It is possible for me to be blind/oblivious, but where in the FSM did you find the procedure to diagnose a misfire?
How did they test the ecm to determine it failed?
I have been chasing a random misfire code for some time. Changed out spark plugs, tested each coil pack, and did a vacuum leak test. No findings. Doesn’t feel like i have a misfire either, just throws the code and i have a high idle 1k.
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