6th Gen ('00-'05): 03' Monte Carlo is multi cylinder misfire and now won't start
#1
03' Monte Carlo is multi cylinder misfire and now won't start
My 03' ss threw the fault code for random/multiple cylinder misfire on my way home one day. We came across one of the coil packs wasn't throwing spark so we got a new one. A couple of days had passed by the time I got the new one and before I went to replace it I went to check the battery level and ended up starting the car out of habit and it attempted to start then died right away. (Up till this point I had started it several times and it would run like crap but it would always start). replaced the coil pack and it wouldn't start and the new coil pack wasn't throwing spark so we replaced the whole thing ( the ignition control module and all three packs) and it still won't start. Any ideas what would be keeping it from starting?
#2
My 03' ss threw the fault code for random/multiple cylinder misfire on my way home one day. We came across one of the coil packs wasn't throwing spark so we got a new one. A couple of days had passed by the time I got the new one and before I went to replace it I went to check the battery level and ended up starting the car out of habit and it attempted to start then died right away. (Up till this point I had started it several times and it would run like crap but it would always start). replaced the coil pack and it wouldn't start and the new coil pack wasn't throwing spark so we replaced the whole thing ( the ignition control module and all three packs) and it still won't start. Any ideas what would be keeping it from starting?
#3
Join Date: Apr 2010
Location: Mentor, Ohio
Posts: 12,153
Since you went for the gusto and changed all the coils and ICM, have you verified if you are getting spark at this point? If so, how did you validate spark?
#4
By pulling the end of each of the spark plugs wires off the coil packs one at a time and attempting to start it. The coil pack ends throw plenty of spark and I doubt that it's the plugs because i replaced all of them about 2 months ago.
#8
I can't speak for camshaft, because I haven't touched that. If you're getting spark, I would test fuel pressure. There's a release valve on the rail, and you can test pressure there. I would make sure you're getting the right amount there before you go messing with hard stuff, because it's really easy to test.
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