My 03 srt4 I put a new agp wastegate on it now when As soon as you start to run I'm getting 5psi and my gauge starts shacking and the car wants to stop?
Check you installation to make sure the vacuum lines are hooked up properly.. check with these diagrams to see how you need to install your vacuum lines with your new wastegate http://www.srtforums.com/forums/f24/vacuum-line-setups-565729/
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