Quote:
Originally Posted by Arthur Dalton
...Anyway..if one does suspect a failing coil in these systems , by moving the suspect coil to another location and seeing if the misfire follows the swap is a cheapo diagnostic trick for the DIY who has no Scope, etc...that is a diyer way of part failure confimation before purchase...
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When my indie was diagnosing my misfire issue, he noted that when plugs were pulled, two of them (from the same coil pack) were fouled. So he changed all plugs and swapped coils to see if the problem would travel to the suspected defective coil.
I drove the car for a couple of weeks.
When he pulled the plugs again, the same two were fouled, despite the coil swap. That led to the conclusion that it was bad plug wires, not coil. Replacing wires cured the misfire in my cases, but unfortunately, collateral damage had already manifested in the form of a fouled catalytic converter and shot O2 sensor.
I suspect that I am eventually going to lose the coils considering they are original...