Quote:
Originally Posted by 100IH
A flat cam lobe on the exhaust will also duplicate the issue described by Tom. Under slight acceleration you'd hear a "pop,pop,pop every time the related cylinder was on its intake stroke, not really intermittent, consistent under the right conditions.
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That's right. The last time I ran into the flat cam problem was back in the 70's when I worked at the GM dealership, and Chevy had some soft cam problems.