Test Description
WARNING: This page is about a different car, the 2002 Pontiac Sunfire, 2002 Pontiac Grand Am, 2002 Oldsmobile Alero, and 2002 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
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When a Medium Resolution Resync occurs, an engine stumble should also occur. If the electrical connection of a component or an electrical wire is malfunctioning, an engine stumble or a medium resolution resync may be induced by wiggling the circuit or electrical connector. - 5
Operating malfunctioning non-engine related electronic components may Emit Electromagnetic Interference (EMI), which may cause a resync. This step determines if the medium resolution resyncs are being caused by an outside source. - 6
Thoroughly check any suspected circuitry. - 8
An intermittent problem may be caused by a number of conditions. - 11
Program the replacement PCM, and perform the CKP system variation learn procedure.