PCM maybe
#21
Launching!
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Location: Johnstown, Pa
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One test they taught us at the GM Training Center was a simple "slap test", start your data logger, then slap the ECM/PCM. If the car misses, you found it. If not stop the logger. Play it back and look for data spikes. If it gets extremely hot it could be the problem. High knock counts or mis-fires are seldom the computer.
Any competent tech could find a mis-fire. Injector driver issues are about the only thing in an LT PCM that would make one miss. Very easy to test with a DSO. Bad or missing wave forms will tell the tail.
Any competent tech could find a mis-fire. Injector driver issues are about the only thing in an LT PCM that would make one miss. Very easy to test with a DSO. Bad or missing wave forms will tell the tail.
#24
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Sounds Expensive$$$$. LOL. I called the auto store they ordered me a new fuel pump so after work today I am gonna throw it on hopefully it works right agian.. Just a note for everyone who has a miss or a bog, Check both fuel and spark. This is the second time now that my car has sounded acted like there is something Going on with the ignition side of things and turned out to be fuel related.. (well Ill know for sure soon)But at only 20psi when idling I would say its probably the problem. But the car really seemed to be an ignition issue with missing in the higher rpms. And Shutting off on the highway soon as the revs hit around 2500-3000 rpm. I will post up agian tonite and let you guys know what happens..
Thanks to everyone with helping me out narrow this mess down!!!!
And hope you guys got a laugh from the pcm article!
Thanks to everyone with helping me out narrow this mess down!!!!
And hope you guys got a laugh from the pcm article!