Emissions, the gas throttle keeps racing high?

Tiny
SUSAN MANN
  • MEMBER
  • 2002 CHEVROLET TAHOE
  • 141,765 MILES
The gas throttle keeps racing high.
Saturday, June 24th, 2023 AT 1:03 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,154 POSTS
Hi,

When you say throttle keeps racing, do you mean the engine idle speed (RPMs) are high? If so, how high does it idle? Is the check engine light staying on when the engine is running?

As far as a high idle, it can be a few things. If the engine light stays on, have the computer scanned.

Here is a link that explains how to scan all modules:

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Next, a higher idle can be caused by an engine vacuum leak.

Here is a link explaining how to locate and repair a leak:

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Let me know if these things have already been done. Also, am I correct in saying the engine speed at idle is too high?

Let me know.

Take care,

joe

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Saturday, June 24th, 2023 AT 10:03 PM

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