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Question (Category: Car)
how do i tell if i have a bad cam lobe. the sb chevy idles ok, but under a load it misses. this started suddenly. this is not carb problem, it could be ign. Optional Information:Year: Pre-1983Make: ChevroletEngine: 400Already Tried:all spark plugs are firing and was ritch i drop the power valve to 3.5 and droped 2 jet sizes. this didn't help. this engine has brodx heads and intake, lunati cam. and only 20 hours on rebuild.

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