93 Grand Prix Posted October 24, 2002 Report Share Posted October 24, 2002 Replaced Spark plugs,wires, ox. sensor, transmission fluid, ignition coils, ignition module, still missing in fourth gear! What now? Quote Link to comment Share on other sites More sharing options...
RedZMonte Posted October 24, 2002 Report Share Posted October 24, 2002 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 Quote Link to comment Share on other sites More sharing options...
93 Grand Prix Posted October 24, 2002 Author Report Share Posted October 24, 2002 I did replace the coils, and the fuel pressure I don't know about. I know it uses a lot of gas!!! even without the air compressor on. Quote Link to comment Share on other sites More sharing options...
ctx46 Posted October 25, 2002 Report Share Posted October 25, 2002 do you still have your old tail lights? Quote Link to comment Share on other sites More sharing options...
93 Grand Prix Posted October 25, 2002 Author Report Share Posted October 25, 2002 Yes, Been trying to sell them for a while. Are you interested? Quote Link to comment Share on other sites More sharing options...
GnatGoSplat Posted October 25, 2002 Report Share Posted October 25, 2002 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. Quote Link to comment Share on other sites More sharing options...
ctx46 Posted October 25, 2002 Report Share Posted October 25, 2002 what do you want for em, and are they in good shape, do you have any picts? Quote Link to comment Share on other sites More sharing options...
msvestka Posted October 26, 2002 Report Share Posted October 26, 2002 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. Quote Link to comment Share on other sites More sharing options...
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