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It's me again...What now?


93 Grand Prix
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only in 4th gear? test your fuel pressure make sure its not low. could be a coil pack. i say have a reputable shot take a look at it. no sence in replacing everthing under the hood for what could be a easy fix.

 

RedZ

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Sounds like it could be an injector.

Does it seem to lack a bit of power on acceleration, and misses worse under load (like when cruising on the highway, then you hit the gas lightly, it misses)?

 

Mine had a bad injector, and that's what it did.

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I agree with Shawn's comments. If it misses in fourth gear under a slight load it sounds like an injector to me. My 89 cutlass exhibited missing under load in 4th gear with the tcc locked. Check the impedence on the injectors, I'll bet you will find one out of spec (12 ohm). I found a pair of injectors that were both at 8 ohm, replaced them and it ran great again.

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