2004 Grand Am is down 2 cyclinders. Replaced PCM but is still misfiring on one cyclinder. Fuel injection appears to be working. What is going on?
NEW battery (cause yours is almost 10) new battery cables (if you cannot clean the corrosion with a wirebrush) and assure the bolt that connects the cable to the engine is free of corrosion and the one that connects to the chassis is free of corrosion~ with RESTORED 12.5 volts we will have a shot at the car working correctly~
Interstates are Good...my dad removed the LEAD from automotive battery design...yay~ but test with a multimeter...should have 12.5 volts ....cannot expect a LOAD test these days because the tin/antimony alloy design does not recharge very easily...in fact hardly at all towards the end of it's life~ so would check the voltage at the ECU..make sure that it's got the full 12 volts~
wirebrush connections to the motor block and to the frame/chassis~ this will make a difference in available amperage~
This is not the problem; but thanks for your input. Anyone else have any suggestions!
Cracked distributor cap...not done LIsa...just questioning your power situation...cracked distributor may lead to TWO dead cylinders~
This ended up being a broken valve spring on cyclinder #2! Got the right mechanic who diagnosed it in less than 24 hours. I'm back behind the wheel!
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