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low vacuum/Lean Idle after GM MAP install

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gsxrtalon

15+ Year Contributor
395
2
Apr 23, 2005
Harrison, Michigan
I just installed my gm 3.3bar, I cut my mdp connector off and wired it straight to the cut wires. Yes I have a 6bolt and my mdp was basically nonfunctional. At the same time I put a new WG spring in, big Blue and put a new steel BISS and o-ring in.

Prior to this the car idled great right around 14.7 @ 950rpms. The car sat for 2 weeks before the installs and took a bit to fire up but once it did my aem wb read dead lean-----
 
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