engine is revving to 300 rpm when turned on, what is the problem?

Asked by Jul 16, 2010 at 06:38 PM about the Jeep Wrangler

Question type: Maintenance & Repair

3 Answers

335

could be your throttle position sensor or a vacuum leak

1 of 1 people found this helpful.
30

Vac leak.

30

X2, if your throttle cable was out of alignment it would constantly run high, the vac system does a lot of work at engine start. A (hill billy) way to check for a vac leak is to spray water over the vac lines and watch for bubbles or smoke a cig.

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