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Old 04-07-2019, 11:22 PM
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Help!

Hey guys recently bought an 2005. Mazda rx8,but have run into a problem it doesnít want to start, I have replaced EVERYTHING fuel and spark related, but when cranking over (and when I can get it to start) gas drips out of my exhaust. Has good compression, cylinder 2 run super rich.
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Old 04-07-2019, 11:36 PM
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Iím not as knowledgeable as most on here but have you tried resetting the fuel trims?

Also, what fuel are you running?
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Old 04-07-2019, 11:37 PM
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Sounds like the injectors are miswired. Common mistake when replacing the engine.
Did it work fine at some point, and then broke, or you bought it like this?
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Old 04-12-2019, 03:47 AM
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Is this phenomenon of excess fuel? gasoline burning does not go away very fuel consumption.
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Old 04-12-2019, 07:31 AM
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Injectors

Originally Posted by Loki View Post
Sounds like the injectors are miswired. Common mistake when replacing the engine.
Did it work fine at some point, and then broke, or you bought it like this?
the car ran ok when I got it it had a cylinder 2 mis fire so I tried to put sea foam in the gas and red line it a few times to get it Thur I did that than car started to smoke bad and started going Thur gas quick like 1/4 tank in about 5 mins so I put all new coils and plug and all new injectors fuel pump fuel damper and now the car will start every once in a blue moon and when it dose it hose Thur gas very quick canít drive it any where
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Old 04-12-2019, 07:46 AM
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Originally Posted by Ermintrudew View Post
Is this phenomenon of excess fuel? gasoline burning does not go away very fuel consumption.
the car puts out so much feel itís not starting unless I pull the fuel pump fuse but last night I wasnít Thur all the wires on car found the the 1st iím injector pigtail wires were bearing crossed so I buy new pigtail put it on and no difference so I checked my spark and only my leads are sparking not my trailing???????HELP
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Old 04-12-2019, 07:47 AM
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Can o2sensors if gone bad make your car not start??
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Old 04-12-2019, 08:11 AM
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Only the leads should be sparking, that's fine.
How long did you drive with a misfire?

There are a few options here:
- injectors miswired. I can't understand what you mean about the pigtail. You said you had them replaced, which is when they would have become miswired. It's really easy to mix up the primaries and secondaries. That would cause your current no start problem, separate from the original misfire problem.
--- check your injector positions and wiring against the proper wiring. You can google for that.

- loss of compression due to driving with a misfire for a while and destroying the cat and the engine
--- get a compression test

- some kind of massive air leak. See if it does better if you unplug the MAF.

In any case, get the spark plugs out and clean the gas off them before trying to start again after you perform any fix.




Can you write in real English though? It's really hard to understand and help.
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Old 04-12-2019, 08:27 AM
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I drove it like that for a few days but Compression check was done already and all wiring was checked last night the car was running good when I got it until I did the red line with sea foam in the gas didnít have any fuel issues till I did that?
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Old 04-12-2019, 08:28 AM
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Why do the trailing spark plug not fire?
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Old 04-12-2019, 08:29 AM
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And my car is empty on my exhaust it was hollowed out
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Old 04-12-2019, 08:41 AM
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Trailing ignition is not required in startup.
I think the original misfire issue is separate from this no start issue, and in attempting to fix the misfire (coils, injectors, fuel pump, etc), the new issue was introduced. That's the only thing that makes sense to my mind.
Can you retrace your steps of what all was touched during the work?

Are there any OBD codes set?
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Old 04-12-2019, 08:46 AM
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Everything I mentioned were the only things that were touched and what I had to take apart to get to them I did for goer because a lot of things I looked up said maf sensor going bad I changed that to but when I pull the plugs out the are soaked in gas to and black Sut on them? And the plugs are new
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Old 04-12-2019, 08:54 AM
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Right, so it's flooding out, which means too much fuel. Since we're talking about startup there aren't too many ways for that to happen (given that the spark plugs are firing):

- it's firing the wrong injectors (either r1 for r2 and vice versa, or secondary instead of primary), which means they're wired incorrectly OR the incorrect injector is in the primary position. They are not all the same.

Since you say only R2 is running rich like this, that further confirms it one of the R2 injectors. What is R1 doing?

- there is way, wayyy too much fuel pressure, but this is highly unlikely or even possible.



I know you checked the injectors, but all the signs still point there.

Are the coils wired to the correct spark plugs?
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Old 04-12-2019, 08:59 AM
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I believe so leads are on bottom and trailing on top first coil lead second trail third lead fourth trail and according to the diagram I found injectors are correct and I put them back the way they were when I took them out.cyclinder 2 is near fire wall correct?
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Old 04-12-2019, 09:02 AM
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And the car is doing the same thing it was doing when the problem started before I took any injectors out at all all I did before this happened was put sea foam in my gas and red line the rpms than car started acting up
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Old 04-12-2019, 09:03 AM
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Could the Bare wires that were crossed together on the primary first injector cause this problem to stay happening after being fixed?
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Old 04-12-2019, 09:05 AM
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The only codes I had before this happened was cylinder 2 misfire and heat o2sensore
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Old 04-12-2019, 11:00 AM
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Verify injector wiring is correct:

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Old 04-12-2019, 11:03 AM
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Yes that is the same diagram I found
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Old 04-12-2019, 11:05 AM
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You put seafoam in your gas???? You're not supposed to put seafoam in your gas...
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Old 04-12-2019, 11:06 AM
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Yes I put sea foam in my gas why are you not supposed to I mixed oil with it when I did it so it would mess with drying anything out
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Old 04-12-2019, 11:09 AM
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Seafoam is supposed to be put into the engine thru the vacuum hose, never in your gasoline. Was this seafoam meant for gas use or is it the normal one?
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Old 04-12-2019, 11:12 AM
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The sea foam Is used for gas
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Old 04-12-2019, 11:13 AM
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