what’s up guys!
‘87 cobalt
alpha1 drive
454 BBC
Boat runs great till I stop and hang out floating or beached for a while, then it has a misfire condition around 1500 rpm.
Now here’s the interesting part. If I keep the engine hatch open while hanging out (floating or beached) the misfire doesn’t happen.
Been through the whole ignition system (grounds, coil, timing, distributor ect) only thing left is the ignition control module.
I’ve read that the ICM can be sensitive to heat when it’s on its way out.
thoughts?
‘87 cobalt
alpha1 drive
454 BBC
Boat runs great till I stop and hang out floating or beached for a while, then it has a misfire condition around 1500 rpm.
Now here’s the interesting part. If I keep the engine hatch open while hanging out (floating or beached) the misfire doesn’t happen.
Been through the whole ignition system (grounds, coil, timing, distributor ect) only thing left is the ignition control module.
I’ve read that the ICM can be sensitive to heat when it’s on its way out.
thoughts?
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