1997 Pontiac Grand Am Repair Question
Asked on September 14, 2011
What should I do next?
2.4L was misfiring. Codes for misfire, O2 and lean bank. Replaced plugs, coils, CPS, had ICM tested - ok. Did spark test- no spark. Battery charged. checked incoming harness to ICM. I did get 1 volt between purple and yellow. seem to have no voltage while cranking on the two wires carrying a/c voltage.
Asked by Kbullman1963Answer
Replied on September 14, 2011
Lean fuel condition could be caused by one of the following below:
1.Vacuum leaks
2.EGR and PCV valve.
3.Low fuel pressure.
4.Dirty fuel injectors.
5.Mass Air Flow Sensor.
6.Oxygen Sensor.
No spark: No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs,coil's resistances,cap and rotor,distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it and keep testing
