blreves Posted August 1, 2009 Share Posted August 1, 2009 my 91 misfires at about 1880 rpms and when it is on a pull going uphill. i have taken it to a mechanic we changed plug wires and coil pacs i put in a new cam sensor. i cant figure it out. it never misses when idling or at low speeds or even higher speeds when it misses i can put my foot in it and it goes away. thank you all you have helped me many times. Link to comment Share on other sites More sharing options...
padgett Posted August 1, 2009 Share Posted August 1, 2009 Symptoms are typical of secondary ignition problem, low rpm/moderate load/high gear. Could be plugs but if you have changed the coil wires (8mm ?) and coils (3) that just leaves plugs and the ICM. Spare from the recycling center is $20-$40 complete and good to have one.Cam sensor is unlikely & crank sensor should not be load related. Link to comment Share on other sites More sharing options...
DAVES89 Posted August 1, 2009 Share Posted August 1, 2009 Try checking the mass air flow sensor Link to comment Share on other sites More sharing options...
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