I installed a new motor in a 1990 chevy Silverado about 5 months ago. every time i start it there is a loud clunky noise which goes away after about 1 or 2 minutes.I took apart the exhaust… why does #2 cylinder have rust on the exhaust port not black soot?
Sounds to me like no. 2 ain’t firing. Does it have a dead miss?
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