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Discussion Starter · #1 · (Edited)
Need help on this one.

Have a constant yet not consistent (like a single cylinder) misfire. When I first start the car it idles fine for about 2 seconds, then it starts in this slight random misfire. It occurs anytime the engine is at a constant rpm. It does not seem to be there when speeding up or slowing down.

I have:
Performed the IAC cleaning - no change
Removed and cleaned the throttle body - no change
Performed the TPS wire search - no broken wire, no change
Replaced the plugs - no carbon tracking, no change
Switched the MSD wires back to the stock wires - no change
Switched the MSD coil pack back to the stock coil pack - no change
Reset the computer several times - no change
There are no vaccum line leaks that I can find, all clamps tight, and always boosting normal. Is not a WOT problem with a 13.575 @105.11

It is NOT throwing any CEL's.

Any thoughts??? Could it be a bad TPS that is not sending proper signal unless it is moving? Anyone know of any other sensors/switches that could cause the problem? Could it be an injector? Anyone else experience this?

Thanks for the help.
 

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do you have a cel? sounds like the same problem I was having for a while, then I got an 0303 cell. Its at the dealership now, they said that it required a reflash to the stock ecu. I also noticed some people were having problems with injectors.
 
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