sounds like one or more of the plugs has a problem. hopefully its not a coil pack

 

i hope its not plugs or coils here is a small vid i took last night.

 

Id change the plugs. Chances are that's your problem

 

sounds like you got cams...but it might be your plugs cuz its mis firing

 

just spoke to my mechanic and he said there is abit of oil on the spark plug bay from the cam cover gaskets and the plugs may be dirty. so 100k service coming up soon. and i was hoping its not the the plugs cause they were changed when i went single.

 

Just change the plugs. Thats your problem.

 

sounds like you got cams...but it might be your plugs cuz its mis firing

Id change the plugs. Chances are that's your problem

just spoke to my mechanic and he said there is abit of oil on the spark plug bay from the cam cover gaskets and the plugs may be dirty. so 100k service coming up soon. and i was hoping its not the the plugs cause they were changed when i went single.

Like everyone said, it's your plugs... After a few WOT pulls the spark plugs will eventually burnt out. Why you think APU owners buy spark plugs cases at a time and not 6. LOL

 

that usually happens with a straight pipe

 

i could be the straight pipe

 

My car is doing this exact same thing, Popping almost misfiring at idle but it doesnt do it till it warms up. Car has 4" straight pipe all the way back it was like this when i bought it. Plugs are new NGKs gapped at .028 along with brand new super spark coilpacks. Its running about 15ish AFR at idle so i know its not running too rich. Is there any other way i can fix this besides putting a converter back on it???

Thanks

 

not trying to scare you. but my car did it, and it was because the exhaust seats were worn out and not sealing properly. its an intermittant misfire that comes and goes. hopefully plugs will fix it, but it didnt on mine.

 

Need to read ur knock count per clys .... Spark plug is not the problem it just the symtom of something else

 

my guess is due to leaky exhaust valve(s) or seats.its an easy fix since you are rebuiding it

 

I'm no expert on why this happens, but I can tell you that I have had two Toyota turbo engines that did the same thing at the same temps. One was my GTE and the other was a 22R-TE. I could not tolerate it on the Supra so I started experimenting with the AEM and found that it is very easy to eliminate by either retarding your idle timing or adding fuel at idle. Timing has a profound effect on AFR so you don't need to change it much. I went from 17.5 degrees of advance to 15.7 at idle and the problem cleared right up. Hope that helps.

 

I was going to say maybe it's running too rich but your afr at idle seem fine. Have u done a compression test on it lately? My car popped and backfired a lot with a bad piston.

 

Bumping this from dead. I'm having the same issue i replaced the plugs and coil packs and it didn't go. Sixsin what was that about?? How did you fix it???

 

Im having same problem any solution?

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