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Message: <blockquote data-quote="98GTAZ" data-source="post: 1510744" data-attributes="member: 29480">I did another smoke test. Introduced the smoke at the IAT sensor hole in the CAI. Had the throttle body propped open. Each time I introduced smoke I saw smoke rising from the front of the intake just behind the alternator. It consistently always rose from between two of the intake runners just behind the alternator.Given this, I am thinking this is an intake manifold vacuum leak that is slowly getting worse.Should I just replace the manifold or are there other items to test? If I do replace the manifold, which manifold should I use? The car is a 1998 with NPI heads. I have seen some YouTube videos of people putting the Ford Racing PI intake on a car with NPI heads and using RTV sealant to deal with the port mismatch with NPI heads. What does everyone think of doing that? Good idea or should I just stick with an NPI intake?</blockquote>