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How do I restart a flooded RX8?
Submitted by jkkesler on Saturday, December 3, 2005 - 11:59am

I am about to tow my RX8 to the dealer because it flooded. Is there anything I can do to restart it? If not what does the dealer do that I cannot?

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subject:
Rx8 flooded
author:
date:
November 16, 2010 - 7:43pm
Hey guys i have a question about the same thing, my rx8 wont start and I think its flooded too. If any of you would be nice enough to tell me the instructions step at a time. I would appreciate your help, Thank You! Heres my email: Crisjb07@hotmail.com
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subject:
Flooded RX8
author:
date:
December 3, 2005 - 10:08pm
Don't follow the owners manual because you'll never get it started! I've flooded mine twice (stupid!) and I had to floor the accelerator pedal and keep it down while I repeatedly ground the starter (5 - 10 secs at a time with 10-20 sec pause between). Don't let the pedal up between cranks!! I had to hook another car up with jumpers to give me enough battery power and life. Took about a half hour. After awhile it will start sounding like it wants to start but won't. Just keep at it and don't get excited when you think its started and let up on the gas - keep the gas floored until it's well and truly running. Will be rough as hell when it starts but will smooth out. Your leg will get tired holding the pedal down. Good luck!
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subject:
Flooded RX-8
author:
date:
December 4, 2005 - 5:04pm
The best way to restart it is to remove the fuse for the fuel pump. Its in the fusebox under the hood. Its a 15 amp blue fuse. Make sure you get the right one, there are other blue 15 amp fuses.

Pull the fuse and crank the car until it sounds like you have compression again, then re-install the fuse and try to start it. You may have to try it a couple of times but eventually it will start.

Rory
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subject:
Flooded RX-8
author:
date:
May 20, 2007 - 4:28pm
I tried Rory's method with a twist and it worked like a charm. Took fuel pump fuse out, it actually is yellow 20 amp on my 04 RX8 and revved for about 7-10 seconds to clear out pump.I then turned off car and replaced fuse and started without putting my foot on the pedal. It took about 15-20 minutes and 6 tries and it finally worked. At one point, the battery sounded like it was dying and I used jumper cables to supply extra power to the vehicle during this procedure. Keep trying and this may save a trip to dealer. The only question I have now is do I have to take car to dealer to get recalibrated from removing fuse? The car felt a little sluggish afterwards, but it could be my paranoia of the car stalling on me on the road.
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subject:
Flooded RX-8
author:
date:
March 19, 2010 - 3:39pm
My 2004 RX-8 (Roxy) was flooded one other time and the dealer charged me $500.00 to fix it. Bastards. Thank you Rory and GFaust for your advice....it worked like a charm. The fuse is a 20 amp yellow one and I did a combination of Rory, GFaust and the first post putting the pedal to the floor, running the starter for 10 seconds....10 second pause....10 starter and so on for about 5 min. Put the fuse back in and it fired right up. Oh, and I had to have jumper cables hooked up also. Thank you so very much guys for your advice. I wish I could buy you both a beer for saving me so much money!
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subject:
Great!!
author:
date:
January 4, 2011 - 8:32am
Thanks a million for all of your posts!
Had the same problem with my 2004 RX-8 HP. I used all of the tricks in combination and it worked after struggling a few hours! The owners manual did not solve the problem.

So, just to summerize:
1. Verify that the oil level is ok.
2. Removed the fuel pump fuse (#22).
3. Hook jumper cables to another car (or you will kill the battery within minutes).
4. Depress the accelerator fully and crank it for up to 10 seconds.
Repeat #4 until there is compression again - wait 20 seconds or more between each iteration to save the starter.
5. Re-install the fuel pump fuse
Repeat #4 until the engine starts (you must have compression to success). When the engine starts; rev it so that it doesn't go out. There is gonna come a lot of smoke from the exhaust until it's clean.
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subject:
These are great tips. I tried
author:
date:
October 21, 2010 - 3:18am
These are great tips. I tried them but unfortunately my battery wouldn’t last long enough to clear the flood before starting so had to resort to calling the AA (breakdown service in UK). The guy they sent round had an interesting technique which I’ve blogged about here:
http://spinage.me.uk/228/starting-mazda-rx-8-with-flooded-engine/
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