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RX8 Starting Problems | RX-8 Flooding issue

December 3, 2008 · Print This Article

The RX8 (and many other new cars which comply with EURO 4 emissions) can be prone to flooding. The reason for this seems to lie with the need for the catalyser to be warmed quickly to comply with EURO 4 emissions. This means that initially the engine runs very rich increasing the risk of flooding if the engine is not allowed to warm up before switching off.

The manual gives advice on starting which will minimise the chance of problems. The recommended procedure is to depress the clutch; do not touch the accelerator; crank the starter until the engine starts, even if that means cranking the starter for up to 10 seconds. The engine sounds a bit different from a piston engine when starting and can take longer to catch but it’s best to keep going rather than have several attempts.

If this does not work after several attempts then either call Mazda Assist or fully depress the accelerator and crank the engine for 10s (This actually shuts off the fuel to the engine and helps clear fuel from chamber), then try to start as above again. Alternatively removing the fuse to the fuel injection system and cranking the engine should have the same effect.

If this doesn’t work then the plugs may need to be removed to clean them.
Following an episode of flooding the functioning of the cat should be checked by the dealer as it has been known for the unburnt fuel to damage the cat.
In practice problems only seem to happen following a short move from cold e.g. moving car from garage to driveway. If you need to do this then run the engine for a few minutes or go for a run round the block before switching the engine off.


If following the recommend procedure above does not work, you do not have Mazda Assist support and you feel competant, here is the technique Mazda Assist will normally use (to be performed at your own risk):-
  1. Use jump leeds to connect to additional power source (see note 1).
  2. Unplug Air pump connnector (see note 2)
  3. Take fuel pump fuse out (see note 3)
  4. Crank for 4 seconds, pause for 2 seconds, repeat for about a minute
  5. Leave for a minute
  6. Crank for 4 seconds, pause for 2 seconds, repeat for about a minute
  7. Put fuel pump fuse back in
  8. Crank for up to 10 seconds, if it catches but doesn’t start, stop cranking
  9. If not started go back to step 3
  10. If started, wait 30 seconds for oil pressure to rise
  11. Stand on throttle until white smoke stops coming out of the exhaust
  12. Disconnect jump leads
  13. Leave to warm up on idle for a few minutes
  14. Put air punp connector back on (see note 3)
  15. Go for a nice long drive to recharge the battery


An additional power source is required as the standard battery will not crank the engine for long enough to clear a serious flooding. Eiher connect to an additional high capacty battery, or to another car with its engine running.

The Fuel pump fuse is number 22, a 20A, 3 from the top of the second column of the fuse box.

The air pump connector is on the black circlular motor housing to the left of the oil filler cap. Removal is recommend to reduce power drain on the battery, to prevent fuel vapour blowing back in to the chambers, and to reduce the possibility of a backfire after starting which can damage the catalyst.



This is part true, but mostly untrue.

If you start up an RX8, move it 2 feet and then stop the engine, you dramitically increase the chance of flooding the engine (for the reasons described by crabacle above). It’s not a certainty though. That said, it is strongly suggested you don’t do that.

You don’t have to go on a 10 mile run to avoid the problem though (although it might be fun).

How to minimise the chance of flooding

1 - If the temperature gauge is in it’s normal position (normally there after ~5 minutes of driving), then it’s highly unlikely the engine will flood. So don’t worry about it.

2 - If you need to move the car a short distance when it’s cold (it’s ok when it’s already warm - see point 1), sit there and enjoy the music/engine/exhaust note for a few minutes until the temperature gauge begins to move. Once this has begun to move, it’s highly unlikely to flood.

3 - Follow the shutdown procedure (although generally option 2 is preferred). There is a leaflet provided by Mazda with the newer RX8’s that covers this.

4 - Go for a short drive (couple of miles). Preferably down some twisty country lanes. That should warm both you and the car up.

I’ve personally followed these guidelines for the last 3.5 years, and haven’t flooded the engine yet (now touching wood).

If the worst does happen and you flood the engine follow Mazda’s guidelines initially (described by crabacle above), and if that doesn’t work try druck’s solution (above).

Credits to rx8ownersclub.co.uk


97 Responses to “RX8 Starting Problems | RX-8 Flooding issue”

  1. Flooded on January 15th, 2009 10:49 pm

    Thanks so much for posting the de-flooding info. I’ve tried different procedures in the past, but they never worked. Your procedure worked after two tries. It saved me a trip to the dealer. Thanks again.

  2. Andy on February 6th, 2009 9:45 pm

    I have recently bought a 2004 RX8 and I love it. I would swap my wife for on, its that good.
    However, I have had this flooding problem. Just this morning I drove it around 3 miles to a petrol station to fill up, this was to make sure the engine was warm. After filling I could not get it started again. I followd the startup proceedure but nothing. I left it for 20mins and tried the startup proceedure again and this time it worked.
    My RX8 usually takes around 10 sec to start up. Having read a few links on various sites it would appear that this i not as it should be, although the dealer told me this was standard for the rotary engine.
    I am wandering if the combination of a poor starter motor and not knowing the proceedure to turn off the engine correctly are to blame for my woes.
    Having said this i would like to say again how fantastic the car is when it is running.

  3. Ian on March 12th, 2009 6:29 pm

    i have an 05 rx8 i went and got me spark plugs changed and now it wont start at all. Is this a flooding problem or what?…what would be the solution to this problem?

  4. Amanda on March 26th, 2009 1:35 am

    I have an 04 mazda rx8. It just flooded on me for the first time because I moved the car in the morning and then left it. This afternoon it took me a while to start it but, after following the instructions in the manual, I finally got it to start. I was just curious to know if it is ok to drive the car immediately after I have just started it from its flooded state. Should I let it rest or drive it for a while. What is the best procedure to follow after starting an rx8 that has become flooded from sitting all day?

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  6. Anonymous on May 16th, 2009 7:04 pm

    how do i properly decarbon rx8 rotary engine

  7. Dave on May 20th, 2009 5:15 pm

    I Have an 05 RX8 in mint condition and have decided I hate it now. Does anyone here want to buy this fully loaded, euro touring pacakge, sport flairs, DVD mapping and everything else possible attached to it car?

    $17,500 is my going rate…

  8. Peter Zambouros on July 6th, 2009 3:32 pm

    I have a 2004 RX8. The car is a lot of fun to drive. The only drawback is the engine flooding problem. This has happened to me 6 times since I purchased the car. Each time I have to replace the starter, the alternator, or the battery, wires etc.or all of them. I am sick and tired of this costly nonsense. Obviously the motor has defects that cause the flooding, and the Mazda dealer does not know how to deflood the engine without replaceing all or some of the above. I will never buy another Mazda as long as I live, and I am going to sue Mazda if I don’t get satisfaction.

  9. RX-8 cost of ownership - FinalGear.com Forums on July 26th, 2009 1:40 am

    [...] http://www.rx8blog.com/rx8-starting-…looding-issue/ If you start the car, you can’t turn it off until it reaches temp or else the motor may flood and not restart. Could be VERY annoying if you just want to move the car a few feet (to pull it out of the garage for a wash for instance) or drive somewhere close quickly. Personally, I’d stay away because the reliability is questionable. __________________ "Acceleration, not nationalization. Of the banks. Although obviously it’s easy to make a credible case for state ownership of other industries, such as utilities." - James [...]

  10. David Z on July 28th, 2009 5:24 am

    Dave i will give you $10k to win your ongoing pain! :-)


  11. kenny. on August 27th, 2009 3:53 pm

    great advice. worked for me first time. love the car. going for a nice long drive now.

  12. JIm Oct 20, 2009 on October 20th, 2009 9:48 pm

    I bought my 2004 RX-8 new in Oct 2003, It has been a great car, no problems of any type what so ever. Until last week. It would not start after I was out of town for a month. I’m sure I flooded it right before I left as in looking back I started it cold, moved it a couple of feet, and turned it off cold. I know better, but it was a senior moment. Anyway, I put in a new battery , also used jumper cables from another car for extra boost, and used the technique discribed above in removing the fuel pump fuse , and cranking it a number of times. I had to go through the procedure twice, but it fired up and is now running as good as ever. This was a great tip—THANKS. It really worked for me.

  13. Paula on November 3rd, 2009 4:51 am

    I own a 2004 RX-8 and I love it. I do however have trouble when turning off the engine (when hot) and trying to start the engine after a few minutes. Many times I have to wait 10 minutes before restarting the engine. Does anyone else have this problem? I find myself dilly dallying to waste time on short errands.

  14. Proud Veilside D1GT RX-8 Owner on January 19th, 2010 11:46 am

    I have an 2003 RX-8 and have had all the flooding experience in the world.

    Solution :
    Some motors have lower compression , weak ignition coils, weak plugs and a weak starter. Mazda only reviewed the starter of the RX-8 on the 2005 edition. This all contributes to the flooding issues.

    I contacted BHR (Black Halo Racing) in the US and replaced my coils with BHR ones, my wiring with MSD leads and plugs with NGK iridium plugs.
    Get your compression tested and watch your RPM readings coming from your starter. 2003 and 2004 starters are weak so I recommend an upgrade to a 2006 one or equivalent. My RPM reading was low on ones of my rotors so I replaced the starter and I’m happy.

    So far, my car has been immune to flooding :)

  15. Nathan on January 19th, 2010 9:39 pm

    Hi, I’ve got a 04 RX8 231, i’m having problems, when temprature guage is at optimum temp, it won’t start but once it cools down, it starts perfectly, i don’t know whats wrong but its doing my nut in.

  16. Thomas on January 20th, 2010 6:47 pm

    I used this procedure and it definately works to de-flood the Mazda RX-8. (Disconnecting fuse and air-pump connector). Make sure to follow to the “T” as not to overwork the starter. It actually took four full repeats, but voila…..my car started and I’m estatic! Thanks to this website for saving me hundreds vs a dealership.

  17. Jonathan on January 13th 2010 on January 23rd, 2010 1:03 pm

    I flooded my engine and was unable to start it. After several attempts similar to above, the battery was beginning to be affected. I removed the fuel pump fuse and attempted again, but to no avail. By this time the battery was pretty dead.
    I attempted a bump start by rolling the car down a hill and to by total surprise despite going about 15mph it didn’t start.
    In the end I succeeded starting it by towing it at about 15-18mph and bunp starting it. Took quite an effort but it started.
    Not plesant, but a valuable lesson learned after simply putting my RX8 in the garage from cold. Appart from this minor hiccup it’s a faultless car. :)

  18. simon on February 2nd, 2010 3:28 am

    I have a 04rx8 and have flooded it on a number of times.The best way to get it going is to tow it..First take out fuse for fuel injector. Then tow round the block,,leaving it in second gear.It wont start when towing but when you have finishing towing,put fuse back in and it will start 100percent.
    Nice car but had enough 15miles to gallan round town.Off to buy a micra.

  19. Dragan on February 6th, 2010 12:58 am

    Love my 2004 RX8 but not Mazda service. I had my clutch hose rupture requiring a tow to the dealership for replacement - not a big deal can happen to any car. The problem was when they gave me the keys to take it home the engine wouldn’t start because they obviously moved it a short distance and turned it off – flooded first time. While the dealer was trying to resolve the starting issue, this was the point they rang me to say that my starter motor needs replacing. I rang Mazda Australia (what a waste of time) demanding an explanation as to how my car could go in for one thing and suddenly need another. By the way the other thing would come at a cost of $600. Mazda Australia rang the dealership and low and behold they got my car started. From this point my car never started the same, took longer than normal and sounded different. Later my car developed the problem where the coolant light stays on because the sensor is not working properly - $300 AUD problem to rectify because you have to replace the whole reservoir, finally decided to get this done when the dealer calls me to tell me that when they went to remove the hose from the bottle to radiator the top of the radiator broke off. This issue cost me $1200 to for the new radiator and $300 for the bottle. Mazda Australia said that my car was out of warranty and that was it. Does anyone know how statutory warranties work? Another time I got my car services at the same dealer, got the keys went to start my car to find a crack in the windscreen right down the middle. No I am not a gluten for punishment but had no choice because all of the Mazda dealerships are owned by the same people. Finally found a rotary specialist through another RX8 owner who replaced my started motor with a generation 3 type – car starting better than ever. “Love the car, hate the company”. They do not care after the 3 years and will not help you.

  20. jeffw on February 6th, 2010 10:23 pm

    I experienced the dreaded “rx-8 flood” for the first time last night when I went out to the garage to start the car after it had been sitting for about 4 days in cold weather (20-40F). I bought my 04 rx-8 in October of 09 with about 36K miles on it and I was warned about the flooding issue so I have always let the car warm up to temp before shutting down. I have had no other issues with the car thus far.
    I beleive this issue was caused by a combination of the cold temps/battery going bad. I noticed on my initial try at starting it was not turning over very good but the battery was not all the way dead so my several attempts at normal starting may have caused the flood.
    This morning I purchased a new battery (Duralast Gold), installed it and then tried the de-flooding procedure in the manual but It didn’t work, so I did a web search on this problem and found this post. I printed the procedures listed here and went out to give it a try. I am happy to report it worked perfectly! The car fired right up after two rounds of the 4sec, 2sec steps. Thanks for posting as this saved me a costly tow to the dealership.

  21. Gary on February 7th, 2010 4:35 pm

    Thank you for the great info! My 2004 RX8 was moved in and out of my garage by my wife while I was away. I’ve tried starting it for a month now with no luck. Using the procedure listed above, it finally came to life, with a nasty cough at first.

  22. Nancy on February 17th, 2010 4:44 am

    I have a 04 RX8 with flooding problems common for the vehicle when turned off after a short distance…However, I just had the spark plugs changed and the fuel system flushed and de-flooded last week…And, already I’m having issues starting it again…The dealer wants to change the coolant system sensor…also a common problem with the RX8….but I can’t find anything that would indicate this causes starting problems….Anyone have a suggestion..??

  23. jobi1 on February 18th, 2010 12:36 am

    followed instructions to get rx8 unflooded and eventually worked, now am having a problem after filling up, it takes around 15 to 20 seconds to get started but only after filling up, battery nearly dies every time but starts fine any other time (if not flooded), can anyone help?

  24. Pirate on February 18th, 2010 4:14 pm

    What Mazda should do is leave the exterior and interior of the RX8 exactly as they are, but, take the engine that’s in the MX5, add twin turbos to it and drop it in the RX8’s engine bay. Instant rocket with none of the hassles of the Renesis. They’ll sell ‘em faster than they can make them.
    But, some will say, ” That’ll spoil the whole personality of the car. The Renesis rotary is the heart and soul of the RX8″. Not so; the looks and practicality are the cars’s attraction points. The Renesis engine is the “eve of its destruction”. This engine requires more maintenance and hassle than keeping a WWI bi-plane in the air.

  25. bramms on February 20th, 2010 5:12 am

    Thank you who ever you are! Love my rx8 moved the car too soon to garage in cold, fool!! Besides this precaution and “foam on dip stick scare” love the RX8: style, form, function,balance, performance and price all in one. Watch revs manage oil let warm treat like creature enjoy.

  26. Justin Foster on March 16th, 2010 1:22 am

    YOU ROCK!!!

    I was just about to tow my car in and get the dealership to fix it. I must have flooded it right at the end of the winter when I put it away. Between the flatbed towing and new plugs it would have been > $500. I gave this a try and after 3 goes at it, it started.

    I’m so happy, it goes like a ROCKET!

  27. Bee on April 14th, 2010 6:01 am

    I just brought a 2004 Mazda rx8 with 45k miles. Its run pretty good until when I leave it outside while rainning day for the whole day and put it back inside the garauge during the night. The next day in the morning I went to start up my car and it just didn’t start. Was it because I start it up and shut it down fast when its still cold. when I put it in the garauge than I just turn it off. Is that the problem! is it flooded?

  28. Anonymous on April 16th, 2010 4:10 pm

    @bee… is its flooded because u moved it just a bit a day before. Read this post in order to start the rotary engine from being flooded.

  29. Stephen on April 19th, 2010 8:58 pm

    2007 Mazda RX-8. This procedure worked for me on the third try, Last time my car was flooded was four months ago; had to take it into the dealership. Also, now I know _what_ is causing the flooding (this last one was a short hop into the driveway).

    THANK YOU!! You saved me a repair bill and educated me on the cause. I am forever indebted.

  30. tref on May 14th, 2010 3:16 am

    would ether or quick start help with the mazda rx8 start problems after flooding?.

  31. robby on May 15th, 2010 7:10 pm

    I have an 04 rx8 with about 51k on it. The issue I seem to have is when I make multiple stops on errands its just stalling out on me.I can get it started back up fairly easy after a couple of minutes…I just dont want a car that stalls out at traffic lights and stop signs…any info on how to prevent this?

    I notice it happens after im driving on the highway,is the engine getting too much gas? I hear an almost grinding sound when shifting gears,like a clogged cat,but i just had mine replaced along with coils and plugs.

  32. leo on June 3rd, 2010 1:02 am

    hi guys , i brought my rx8 two years ago from Germany since than i have changed one engine because of compression issue and after this winter same story it wont start and the incompetent mechanics in my country say its compression again but this time there is no warranty and they have no clue how to fix it and i new engine just would really cut into my finances :) and don’t lough because there is only four rx8 in my country and no rotary engines i mean in theory they know but they wont dare touch it not even at Mazda dealers.i took the sparks out and they are black maybe from unburned fuel i guess i don’t know could this be a flooding issue or do these cars have compression issue really ,if so whats the best way how to check compression and what special tool do i need or is it standard just like for a piston car.
    any advise or suggestion will be much appreciated

  33. Ruth on June 6th, 2010 1:07 pm

    Thinking of buying an RX8 and have been told by the garage that I should purchase the additional warranty. They currently offer a 4* warranty with the car but have advised the 5* one, which will cost me well over £800. Have any current RX8 owners come across any issues, other than the flooding, that may cause me an issue for which the 5* warrenty may be beneficial.

  34. kobe on June 17th, 2010 8:21 pm

    my rx8 takes way too long to start and sometimes it doesnt even start..it turns off in the middle of the street sometimes..i have tried to change the battery n see if that was the problem but it wasnt. Would it have anything to do with the fuel injector? ..starter?..or ignition switch?

  35. Jerry on August 7th, 2010 4:49 am

    why does my 04 rx8 not start unless it has cooled off? if started, it will run…but when shut off, it won’t immediately start…immediately meaning a few hours…

  36. Louise C on September 2nd, 2010 5:39 am

    Oh my god, this is amazing!!! Thank you so much! My boyfriends Mazda flooded other day moving it down the road! Mechanic didnt have a clue said it needed to go in garage!! So glad when we stumbled across this, saved us a HUGE bill! Worked after 3 attempts! Thanks again xx

  37. Curtis WW on September 5th, 2010 4:04 pm

    Worked on the 3rd time round ….. absolutely stunning !!!! Definately saved me a few £100 :)

  38. adriana3078@yahoo.com on September 7th, 2010 5:13 am

    I am currently seeking to file a law suit against MAZDA CORPORATION in regards to the 2004 RX8 or the RX8 in general. Anyone interested please email me.

  39. zerokool on September 7th, 2010 8:26 pm

    Hey people. The mazda rx8 has problems like any other cars.
    but like everything else everything has a solution.
    I have been working with cars n this particular car grabbed my attention when a friend of mine had problems with the flooded engine and more.
    Anyways if u have questions about this car i’ll be glad to help you with whatever I can.
    Just email me at zerorx8cool@gmail.com

  40. teddy on September 12th, 2010 8:49 pm

    woe this really worked I thank you sir for this post and yea I have a 04 to and it’s been giving me alot of trouble I had 3 trannys put it and their service dept was not fond of my coming it with my warranty issues because they only get the warranty time

  41. RX8 Tech Guy on September 17th, 2010 9:21 pm

    I have the solution to the engine flooding problem, and have flooded my engine on purpose JUSt so i can prove my slution correctly. It takes LESS THAN 5 minutes, and all you need is long-nose (or needle-nose) pliers… E-mail me for more info!! OptimismNeverFails@gmail.com

  42. ADUSL on September 19th, 2010 12:58 pm

    Thanks for the info everyone, not glad why I had to look you up. 04 and yes, i moved it out of the drive way and now it is stuck. Will find that fuse, then eventually to service dept for check for any missing recalls and service bulletins.

  43. redvers hunt / redvershunt@btinternet.com on September 24th, 2010 6:31 pm


  44. Babyzoomer on October 4th, 2010 6:27 pm

    While I am disappointed that the RX-8 is prone to this flooding problem, I was able to get mine started eventually using the 2nd procedure (15 step) given in this blog, however it took me 4 attempts before it started and stayed started. If you use this procedure, the Mazda Owner’s Manual will show you where the fuel pump fuse is located. I had to go to page 190 of the following web site to find the location of the “air pump connector”:

    Thanks for the information. It saved me the time and hassle of having the vehicle towed and two trips to the dealership for the loaner car.

  45. andy ,uk on October 14th, 2010 6:36 pm

    i bought an 06 plate rx-8 a few weeks ago ,but feel the car has a problem while driving along at steady speeds ,the engine feels like it has a miss and judders sometimes aswell .does anyone else have same problem

  46. Anonymous on October 15th, 2010 9:15 am

    @andy: what oil do you use? Have you recently changed the oil?
    I recommand using5w30 idemitsu or 5w30 royal purpal, both semi-synthetic.

  47. andy on October 16th, 2010 1:40 pm

    just useing mazda recomended oil for car ,not had to put oil in car yet though

  48. Alex K on October 19th, 2010 5:19 am

    Someone else mentioned pullug the Rotary motor out of the RX8 and replacing it with a twin turbo from the Mazda Mx5 or MPS.. i totally agree.

    Anyways.. i’ve owned my 2004 RX8 since new and for the first time last week i experienced the flooding issues. I had replaced the battery some months ago and surely that wasn’t the issue. I called mazda and apparently it was a known issue. (i had no idea). I was asked to press down on the accelartor for 20 seconds while trying to start… this didn’t work.

    Called NRMA lucky for me the mechanic was totally aware of this problem. He attempted to start the car by removing the fuse and pressing down on accelerator all to no avail.

    He then got some long nose pliers and removed 2 vacumm plugs from an area in where oil can be pumped into the rotary motar. Once he did the car cranked up coughing out white smoke from the exhaust. The mechanic advised me that my car was the most difficult to start.

    Im now looking at possibly upgrading my starter motor to something more powerfull. I’ll do some research and go with the plan. I dont know how much longer lll keep the car but i want to be pro active in ensuring i dont get stuck somewhere with another flooding issue.

  49. Melios on October 28th, 2010 12:17 pm

    I’m planing to buy Rx8, but all these problems make me “fear” of mazda.
    I dont know what to do, shall i buy it ?
    (p.s i will not but a new one, just used one)

  50. giles on November 2nd, 2010 2:05 am

    I bought rx8 great car .had first flood .phoned r.a.c. he knew what the problem was. now i know how to sort it.no problem ever since.love my sliver beauty.have got rust on boot where brake light is. will buy a new boot from anyone.gilesbailey@hotmail.com

  51. micky on November 2nd, 2010 3:29 pm

    why does my 04 rx8 not start unless it has cooled off? if started, it will run…but when shut off, it won’t immediately start…immediately meaning a minits,like getting fuel…please help

  52. Dave C on November 3rd, 2010 2:55 pm

    No hot start. Has on 3 occasions taken 10 mins to start .
    Would be more occasions but living around the problem by not switching off. Always takes a few attempts average 90 secs .
    Very embarrising in a busy car park ! and potentially life threatening in some situations.
    Now avoid stopping engine to refuel so Pay Pumps only.
    Mine is a 54 plate less than 43K miles
    Starts fine when cold
    Enough is enough / engaged local dealership.
    Checked Cat / Coils , changed the oil because it was milky around the dipstick which according to TSB 01-050/06 is OK.
    The hot compression test is below minimum .Tell me need new engine ,warranty say if the rotor tips are worn ,not covered by ZZ+ warranty , now I’ve been hung out to dry ! bill now £300 for nothing.

  53. Dave C on November 3rd, 2010 3:18 pm

    Part 2 .No hot start
    I was also told by the Mazda dealer that the battery fitted was incorrect , too low on AH.
    This was sold to me by another local Mazda Dealer / they are ok to exchange this week for the correct item. This battery was fitted Jan 2010.
    Reading other forums tells me when the car is hot and switched off ,the outer casing expands and creates voids between the casing and rotor tips . I gather from this the engine needs to spin faster to create a higher compression . Higher rated starters from 2006 may be the answer.
    Normal running compression is maintained by the cooling system .Looking at the engine construction , the waterways surround the combustion chambers .The heat is dissipated in normal running , once stopped the water gets extremly hot and the casing is not being cooled thus expands and gaps appear .The expansion of the rotors would not change uniformally with the case as they are different metals. When sufficiently coolled down all goes back again.
    Any way warranty wanted the engine stripped at £550 cost to me , but if wear was the cause no go !!!
    Hopefully the correct battery will help matters ,I may try the uprated starter even though £350 + , better than £4 K quoted by dealer , also a stern letter to Mazda Warranty / then Mazda UK then Mazda Japan.
    It does appear that US customers have better luck and a better deal than us poor UK little people when it comes to warranty period and engine milage allowance.
    One thing I have learnt , do not take your vehicle to a new franchise , they are clueless , the service man even said I probably know more about the problem than they do ! Not much for my wallet nor confidence .
    This is a common problem and I don’t think the root cause has been nailed .

  54. Anonymous on November 4th, 2010 1:07 pm

    @ Dave C. It is true that your problem is common for rx8 with more than 50k km. Try with a new starter.

  55. Panda on November 12th, 2010 2:49 am

    My RX8 a little ****** at starting. Always need to wait up to 20 mins after filling up (local garage getting to know me now and follow me out after paying to push car away from pumps), if she stalls can take up to an hour even following info above and don’t get me started on short trips!!! Even the AA could not sort her out. Dealer says I should rev engine for 20 secs before turning off but makes no difference to above problems. Worry about getting stuck in traffic or when out late at night.
    Wish I’d never bought her and definitley would not have if I had been told about starting problems.

  56. VBird on November 30th, 2010 3:20 pm

    I haven’t been able to move my RX8 since Saturday due to the ridiculous amount of snow we’ve had. I turned the engine over on Saturday, Sunday and Monday but today, Tuesday, I tried to start it and it’s not working. I’m not sure it the engine is flooded or the battery is flat. It did turn over yesterday although it struggled to begin with. I don’t think I’ll get it moving for a few days because of where I live and this weather.

    When I went up North in October and it was freezing and I let it sit for a few days and it wouldn’t start. A local mechanic towed it and eventually it started but I won’t be able to tow it until the snow melts.

    Help please…..

  57. Dadedo on December 3rd, 2010 9:50 am

    Have recently purchased 04 rx8 no problems to date but drinks gas like no tomorrow. Live in fear of being caught out in traffic and car stalls. My other car is a 1970 volvo 164 manual 3 litre with dual SUs. Goes like the bats and uses less fuel and nothing, but nothing ever goes wrong with the engine. LOL

  58. ang on December 10th, 2010 6:21 pm

    my RX8 is wonderful . but today when i started it it bellowed white smoke with a hint of blue . the engine took a while to quieten , switched it off and didnt drive . any clues??

  59. rX8 FLOOD VICTIM on December 14th, 2010 12:36 am

    Yes, followed the instructions to the word and after a rew repeats of going back to step 3, it did work. Thanks guys.
    To be sure which is the air pump connector check here http://www.rx8club.com/showthread.php?t=178937

  60. RB on December 22nd, 2010 4:09 pm


    Wonder if anyone can help me…

    Have had my 2004 RX8 (46k miles) for 6 months, it broke down a month ago with a mis-fire and required a new cat, I got the cat, coils, plugs and leads all replaced at a main dealer Mazda.

    When I picked the car up the guy said its having a hard time starting (it wasnt before it broke down).

    Now if I switch the car off and return back to it say after 10 minutes it will take around 2-3 attempts to start it back up!! Very embarassing at the petrol station for example!! :@

    Mazda said a new starter will fix the problem and when I said could it be a compression / new engine issue the guy said he doubted it.

    However I spoke to my local mechanic about this and he has found out that the new starter from Mazda themselves does not really sort this issue out.

    Like I said before I had this huge mis-fire which fried my CAT I had no such issues…

    Whats the best thing to do?

    I’m considering selling the RX8 in favour of something that actually works!


  61. bluerx on December 26th, 2010 3:39 am

    1. check battery (from autozone ect ) and see if you need a new one
    2. check spark plugs and spark plug leads
    3. get mazda to reset computer (reflash)-might not be the problem but might some how fix it
    4. if all above fails you may need new starter

    Check online for help at other forums for a second opinion

  62. matt on January 5th, 2011 10:17 am

    brought mazda christmas for my self starts great cold as soon as i stop it wont start for 10 mins doin my head in now do i take it back to dealer i brought it from..help

  63. DAVID on January 6th, 2011 3:27 pm

    I have been looking to buy an RX-8, but after some research etc, i am staying well away. Fantastic looking cars, but prone to problems due to people neglecting the rotary engine. I dont know how well the previous owner has looked after theirs.

    There’s around 10-15 in my budget in the Auto Trader now, four of which have mechanical problems. Not for me

  64. Karl on January 7th, 2011 6:56 pm

    I followed a combination of this method and the “DIY: Deflooding for the average Joe the plumber” on RX8Club and after 3 days have a working Rex!

    Here’s my victory video: http://www.youtube.com/watch?v=MIdK3nyMSow

  65. stephen on January 8th, 2011 12:21 am

    io have a 54 plate rx8 and its been nothing but hassel. new coil pack,new plugs,new clucth at 48000. my car does not start whn it is warm been to the mazda dealership 3 times and thy say thy cant fix it .its been on the computer and says theres not a problem so there basically thrown me 2 one side. there no help atol total pricks. the mechanic told me 2 change the fuel i use, and also i dnt use the car enough, what a heap o shyt. they never told me tht when i bought it

  66. Anonymous on January 23rd, 2011 2:48 am

    Flooding trouble? E-mail me the explanation of your trouble, how much time you spende on this, how many times the car got towed or went to the machanic. Trying to collect enough names to get sometime of action against Mazda e-mail to RX8Lemon@hotmail.com Thanks!

  67. Harv on February 1st, 2011 4:02 am

    The multi-step procedure worked for me. Had to go back to step 3 three times before it started up, but it did.

    This is the first time this has happened to me and it was because we moved the car from outside into the garage in 30 degree weather and didn’t let it warm up.

  68. Trini on February 4th, 2011 7:26 pm

    I love my Rx8 but there are too much problems with the engine…

  69. Tony on February 5th, 2011 10:05 pm

    just got home after filling up my 04 rx8, love the car, hate filling it up, i have to watch about 10 cars come and go before it starts, nightmare.

  70. Nithi on February 8th, 2011 2:09 pm

    Last month I bought a 2005 model RX8 in England. Soon after I drove home with 12 months MOT from previous owner the car wouldn’t start in the morning. Previous owner advised me that car might need new battery as he jump started it (he didn’t use it for few months due to snow, etc.,). So with the help of my mate’s car I managed to jump start the car after 3rd attempt. Drove to the garage and left it for initial check and battery replacement.

    The mechanic came out with a big list of things to do – Crank shaft positioning sensor, CAT, Battery, Spark Plug and HT leads. The vehicle has done only 24k miles on clock (verified). I couldn’t afford to do all in one go, as I have recently spent huge money on purchasing the car. Left the car off road for a month

    I did CAT, Crank shaft positioning sensor and battery this month. Still sometimes it comes up with sensor light in dashboard and it takes more than 10 seconds to start, some time it just wouldn’t start(Especially if I try to start after a 50 miles drive/ engine is hot). Cranking with fuel fuse off the fuse box helps sometimes (ref - http://www.rx8blog.com/rx8-starting-…looding-issue/) I still love the performance of the car and the looks etc., but this starting problem is making me to hate the car. I just hate it when it embarrasses me in from of friends who can start and drive their little banger in front of my beast.
    Planning to do the HT leads and the spark plug end of this month with full service. Hopefully that should resolve the problem.

    If not I recon I need a new N3Z1 starter motor as well.

  71. Borgy on February 22nd, 2011 7:39 pm

    I have a 2004 RX-8, (73,000kms) love the Car even with the quirks
    and it has a few , flooding is the big one
    Somehow this morning it flooded when I tried to start it
    1/2 hour later it started, with a big puff of black smoke
    but now the engine light is on, but it is running fine.

    This happened last time it flooded and I needed a new CAT

    no problem with hot starting , but cold is a different story
    Im looking for a winter car
    (I live in Calgary Canada -20′c winters)

  72. Dave Cooper on February 23rd, 2011 12:06 pm

    Still hot start problems.
    My observations are ;-

    The car will not re start for at least 7 mins when the temp gauge is reading normal .
    The car will restart straight away when the temp is between cold and normal .
    I did an experiment where I parked on a slope after a run of 6miles , the temp read normal . I stopped the engine and tried to restart. It would not start so I bumped started it in 2nd and fired up straight away.
    Thoughts are that it is not the plugs or coils it may be compression and that the engine needs more spin .
    I’m tempted to think that the oil is too thin when hot and I’m not getting the necessary compression ,as the car is always ok from cold , I may try 5W/40 oil as it will be more viscous when hot and see what happens.?!!!? Also I do’nt want to waste £400 on a starter !!

  73. Fernando on March 4th, 2011 5:08 pm

    I just both a 2010 RX8 but the engine is flooded due to weather and the dealer told me to totally rebuild the engine. my question is; is if the 2004 RX8 engine and the 2010 engine are the same because i have a friend with a 2004 engine for sale

  74. Geoff on April 22nd, 2011 9:53 pm

    Thank you to all that posted advice about the flooding issue. I tried to start my baby yesterday and knew it waas flooded by the sound of it turning over as this has happenned twice before. I am getting sick of having it towed to the dealer too.

    Removed the fuse for the fuel pump and turned it over twice for about 8 seconds each time. Replaced the fuse and tried starting it without touching the gas. It started to “catch” so stupidly I tried to give it a little shot of gas but that just flooded it again. At this point my battery was low and it wasn’t cranking very fast. I decided the best thing would be to go to the beer store and let it sit a bit. After about an hour, I hooked up a power pack to the battery and tried it three more times and on the third attempt, it sputtered to life with a huge ploom of smoke from the exhaust.

    After it warmed up, I took it for a bit of a burn and she is running awesome now.

    Thanks again to all. It saved me a lot of time, hassle and money. Time for a beer.

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  91. Frank on June 1st, 2011 6:48 am

    I’m considering buying an 04 RX8 GT from a local used car dealer. He has replaced the alternator and battery recently, and when I took it for a test drive, I noticed the “check engine” light was on. Is this a sign of things to come? Should I be worried? Also, what would be a good price? He has offered $13200 all in. That includes a 2 year warranty.

    Any help would be extremely appriciated!

  92. jesse rodriguez on August 14th, 2011 1:17 am

    I am working on my step-son-in-law’s mazda rx-8.When I first saw it,the battery was dead.I put a new one,but it still wont start.I tried the de-flooding procedure,and still it won’t start.I cleaned the spark plugs,and still nothing.The fuel gauge says tank is nearly full.I hear the pump kick-in with the key.My guess is that the timming gear needs to be replaced.Does anybody have any suggestions?Would be glad to hear from you at:jessegodfearing@aol.com.May God bless.

  93. Josh Edwards on August 17th, 2011 11:41 pm

    a rotary engine does not have a timing gear. quit being a cheapo and replace the spark plugs. check the entire ignition system. check the fuel filter.

  94. kate on August 23rd, 2011 12:23 pm

    please tell me the de flooding procedure just flooded my sons rx8 o4 plate

  95. darren on October 29th, 2011 3:58 pm

    done the same worked after the 7th time cheers

  96. charles on November 6th, 2011 10:50 pm

    I tried the manual, didn’t work then the battery was so dead I took it in for a check and it was no good, bought a new one. Used this method and about 30 min in got it running but the only thing now is the car will not idle right. Any comments

  97. wifeofrx8ownr on November 14th, 2011 1:27 am

    My husband was skeptical….had to try about 7 times….but it finally worked. Thanks for the tips!

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