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bad coil driver?
Posted to Technical Discussion Forum on 6/29/2017 20 Replies

I have a misfiring cylinder that had a misfiring coil that was full of water. Installed new coil and plug and it is still misfiring. Took a voltage sample with the scope on the misfiring cyl and a known good cyl. Does the bad waveform indicate a bad PCM driver? [2007 Ford Expedition XLT, Ignition Photo] [2007 Ford Expedition XLT, Ignition Photo]

Damon Agostino
Technician
Sixth Street Automotive
Macclenny, Florida, USA

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car Vehicle Data

2007 Ford Expedition XLT 5.4L

Engine5.4 L
Trans6-speed Automatic (Electronic)