Question about Pontiac Grand Am
Ok, i recommend checking the following areas for faults--
INspect the Ignition timing. make sure that it is correct. incorrect ignition timing will induce these types of symptoms.
Inspect the entire fuel injection system for clogged injectors and rails.
Inspect the Intake Manifold gasket(s). there may be a leak or the gasket may be damaged or worn. replace if damaged.
Inspect the valve assembly. you valves could or May be Burned, worn, or sticking due to faulty or bad valve springs. if the exhaust valve is sticking , it will cause a misfire.
NOTE-- the ignition timing is controlled by the ECM/PCM in this build so, you should inspect the ECM/PCM for faults as well. replace if found to be faulty.
Pressure in the cylinders seems to be optimal at most so, the rings seems to be in good condition.
Posted on May 23, 2009
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Posted on Jan 02, 2017
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