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Discussion Starter · #1 ·
I have 1988 Fiero GT with the 3800 SC swap from a 2007 Grand Prix. I installed a boost gauge and KOEO comes up good as calibrated at 0. When I start it up it goes to 20 VAC and at full boost comes up to and stops at 0. Is this a problem with the boost gauge or the Supercharger?
 

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Did you tap a line that's referencing before the supercharger rotors/TB area? Make sure it's accessing the line that's coming from the lower intake port under the S/C snout, same as the MAP sensor and fuel regulator (if running L67 rail).
 
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