Engine races

Asked by Thomas May 28, 2017 at 01:08 PM about the 1998 Pontiac Trans Sport

Question type: Maintenance & Repair

3 Answers
7,455

Brian answered 6 years ago

When? at idle or all the time? Either way check all your engine vacuum hoses for leaks, disconnections, or cracks. Good Luck!

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Best Answer Mark helpful
7,455

Brian answered 6 years ago

Other ideas if this does not pan out is the throttle position sensor or if applicable ruptured EGR diaphragm. If you have a Mity-Vac hand pump you can test to see if EGR holds vacuum. See if there are any stored or pending codes. That's all I have on this one for now.

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