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Won't boost in 2nd-5th

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SaxGopher

15+ Year Contributor
151
0
Sep 19, 2004
Minot AFB, North Dakota
Hello,

I've looked around and couldn't quite find anything here that explains this problem, so I'm going to make a post about it.

I just bought a Straightline Specialties MBC for my car and hooked it up. My problem is as follows: for some reason my car boosts up to 16psi in first, and in 2nd it goes to about 14 and falls down to 10, and remains at 10 for the remaining gears. I've tried swapping springs in the MBC, and that didn't solve the problem. What could be causing this?

P.S. I have the MBC hooked up to the wastegate, and then T-spliced into the blow-off vacuum line.
 
sounds like you may have a problem with your wastegate sticking open or you might have a boost leak.
 
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