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Old 01-18-2022, 12:40pm   #21
Aerovette
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Originally Posted by mrvette View Post
Looks ok on timing light, I changed plug wiring/caps....engine runs more or less ok, just shakes like HELL, and misfires under load I have drive it a bit around the block, tried to warm it up a bit,.....pulled two plugs and found them wet/black like too much fuel...oil?? I waiting for warmer this PM, and going to check the O2 sensor output, it's a heated unit, and new maybe 1.5 years ago....
Intake/vacuum leak. I'd put money on it. Check youtube for how to make a dirt cheap smoke type leak detector. Also spray brake cleaner around ports, gaskets, any suspected air leak places.
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