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misfiring question / engine health

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Old 11-29-2010, 07:33 PM
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misfiring question / engine health

So I post this because, I am curious if anyone else thinks this is very suspicious of a possible excess carbon build up.

I made a few 'accelerations' today and at one point got a flashing CEL...ok no big deal...it happens. Not long after, I got another one...this time it flashed then stayed on. Ok...so fouled plugs?

My records indicate I changed the plugs and wires 12k miles ago and the IG coils like 17k miles ago.

So, does that mean I could be getting a lot of build-up? (Beyond the normal)
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Last edited by dmorales; 09-09-2011 at 04:04 AM.
Old 11-29-2010, 07:52 PM
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with your mileage you might want to consider a compression test. Mine started off that way and then got worst. My engine is now completely taken apart pending a rebuild due to 2 broken apex seals. I'm guessing Initially it might have been a sign of a cracked seal that progressively got worst. Then again it might just be your coils went bad.
Old 11-29-2010, 09:04 PM
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Yeah, it might be time for a compression check.
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Last edited by dmorales; 09-09-2011 at 04:04 AM.
Old 11-29-2010, 09:29 PM
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About what mileage where you at when yours failed? Just curious
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Last edited by dmorales; 09-09-2011 at 04:04 AM.
Old 11-30-2010, 12:11 AM
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Clean your MAF and clear the code.
Old 12-04-2010, 12:16 AM
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Originally Posted by dmorales
About what mileage where you at when yours failed? Just curious
Mine went out at around 56K but I was boosted
Old 12-04-2010, 12:23 AM
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Originally Posted by Suave177
with your mileage you might want to consider a compression test. Mine started off that way and then got worst. My engine is now completely taken apart pending a rebuild due to 2 broken apex seals. I'm guessing Initially it might have been a sign of a cracked seal that progressively got worst. Then again it might just be your coils went bad.
With
"worse," not "worst"
No need to capitalize "initially."
Numbers lower than 10 are spelled out.
Old 12-04-2010, 01:01 AM
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Bullitin for you - grammar is not a concern in the 'technical' forii.

I suggest you keep your obnoxious trolling in the lounge, and/or getalife.

This will be your only warning......
Old 12-11-2010, 10:33 PM
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fyi A BLINKING CEL is def a prob it doesn't happen unless there is a pretty major problem.....MISFIRE....check coils/plugs/wires first...if not time for comp test as said above
Old 12-13-2010, 09:34 AM
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Hey, I have a 2005 rx8. It started running rough and check eng light is flashing. took to shop and it has code po302 missfire cyl #2. shop says #2 coil is bad. where is it located? Thanks for any help.

Last edited by suede05rx8; 12-13-2010 at 09:46 AM.
Old 12-13-2010, 09:48 AM
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Originally Posted by dmorales
I made a few 'accelerations' today and at one point got a flashing CEL...ok no big deal...it happens. Not long after, I got another one...this time it flashed then stayed on. Ok...so fouled plugs?
not what I would say. In 60K+ I've only had misfire like that ONE time.

in no particular order, things you might wanna look into:
plugs, wires, coils(especially if your on OEMs with more than 30-40K on them)
MAF clean?
compression

covering those bases will most likely cover the culrpit
Old 12-13-2010, 10:47 AM
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Originally Posted by StealthTL
Bullitin for you - grammar is not a concern in the 'technical'FORA.

I suggest THAT you keep your obnoxious trolling in the lounge, and/or getalife.
Sorry, had to do it
Will you kill me?

Originally Posted by suede05rx8
Hey, I have a 2005 rx8. It started running rough and check eng light is flashing. took to shop and it has code po302 missfire cyl #2. shop says #2 coil is bad. where is it located? Thanks for any help.
The coils are located on the left of the engine. Remove the airbox and you should be able to see them, in the end it is where the spark plug wires end!
Replace the 4 coils, don't cheap out and change the broken ones only. Weak coils lead to weak sparks, weak sparks equal increased carbon buildup
Old 12-14-2010, 08:22 AM
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Thanks for your help? How would I be able to tell is Po302 cyl #2 would be leading or trailing since they are both stamped as cyl 2? I went ahead and ordered the other three coils. but 1 came in today. so it will get me moving today.
Old 12-15-2010, 12:17 PM
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fyi

cleaned the MAF and disconnected the battery. Put all back together, and no CEL so far. (1.5 days)
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Last edited by dmorales; 09-09-2011 at 04:05 AM.
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