Rabbi1 Posted March 8, 2011 Report Posted March 8, 2011 Pulled my codes today and the only code i get is code 42 the car is a 1992 lumina z34 LQ1 Problems with the car are as follows : Stalls upon getting hot at stops (car doesnt overheat just gets warm) Lights dim when i turn headlights & heater (full blast) on car feels like it lacks power Also i tested the alternator & battery, they are both fine. Will be cleaning all my grounds up this weekend. Crankshaft Position Sensor has less than 4000 miles on it Spark plugs have less than 1000 miles on them also the car does some weird stuff when driving, The rpm's kind of fluctuate and i can feel the car lose power for a slight second. Almost like it doesnt want to hold a set rpm. This happens about once every 45-60 seconds once the motor gets a little bit warmed up. Quote
Hairdo12 Posted March 8, 2011 Report Posted March 8, 2011 http://extreme-check-engine-light-codes.com/blog/obd1-codes/gm-obd1-with-code-42/ Quote
Rabbi1 Posted March 8, 2011 Author Report Posted March 8, 2011 would the icm cause my lack of power? I havent done a compression test yet,but as of 3 months ago the compression was almost perfect across the board Quote
Rabbi1 Posted March 8, 2011 Author Report Posted March 8, 2011 when i say lack of power, i mean i feel like im driving an escort Quote
5speedz34 Posted March 11, 2011 Report Posted March 11, 2011 Bad knock sensor causing the PCM to retard the timing? Quote
AL Posted March 14, 2011 Report Posted March 14, 2011 Yes replace your ICM... This happened to me on my 91 Grand Prix Quote
Night Fury Posted March 14, 2011 Report Posted March 14, 2011 Yes replace your ICM... This happened to me on my 91 Grand Prix You mean me, or did it happen twice? Lol Quote
AL Posted March 14, 2011 Report Posted March 14, 2011 You mean me, or did it happen twice? Lol 3 times, I replaced it twice, once it threw code 42, once it didnt... Each coil pack went bad at least once... Did 3 or 4 plug replacements (all 6 each time)cause they kept fouling out... Quote
Night Fury Posted March 14, 2011 Report Posted March 14, 2011 Wonder if it had a short or some shit causing it to go bad a zillion times? Quote
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