Quote:
Originally Posted by tyler219
No DTCs.
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In the process of troubleshooting I managed to get the car running (coincidence, I'm sure) with one of the ignition modules pulled , so I know the engine is capable of running on three cylinders (even with one plug out). This makes me quite confident that the problem is higher up than the ignition modules.
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OK, no DTCs as in nothing that a scanner with history reads or no engine light? Reason I ask is OM says northstar "limp home" feature will alternate firing 3 cylinders but won't turn on the light. Maybe it thinks ur motor is overheating?