Having problems with your 1999 Pontiac Grand Prix ?

Supercharger troubleshooting???? i have a 99 gtp. when i drive and my foot is constant on the gas and the boost meter is at 1 or 2 bars it starts shaking unless i step on the gas some more or take my foot off of it. if you have any idea what this may be it would really help me out.

Posted / edited by AnonymousUser on : 15-01-2018

Answers :

Check for a vacuum leak from the inlet and outlet hoses on the boost bypass valve and especially the boost solenoid.
Repair Help & Product Troubleshooting for 1999 Pontiac Grand Prix

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