Diagnostic Aids

WARNING: This page is about a different car, the 2003 Pontiac Sunfire, 2003 Pontiac Grand Am, 2003 Oldsmobile Alero, and 2003 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.

A small amount of resistance in the battery positive voltage circuit to the PCM may cause a no start. Test the battery positive voltage circuit for excessive resistance or corrosion.
The PCM grounds will cause a no start only if none of them are making a good connection.
If the Crankshaft Position (CKP) sensor is loose the sensor may cause an intermittent no start by moving away from the reluctor wheel.