Idles high then touching gas causes it to shut off?

Tiny
LAURA8880.LG
  • MEMBER
  • 1995 CHEVROLET TRUCK
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
Idles fine as soon as I give it gas it shuts off.
Saturday, November 19th, 2022 AT 6:28 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Hi,

If it has a high idle and then turns off when the throttle is touched, my first possible suspects are either an engine vacuum leak or a fuel pressure issue.

If you haven't, start by checking for leaks.

Here is a link that explains how it's done:

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

If you are unable to find leaks, then check the fuel pressure.

Here is a link explaining in general how that is done:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

I attached the fuel pressure specifications below.

Do this and let me know what you find. Also, let me know if the check engine light is staying on when the engine is running.

Take care,

Joe

See pic below.
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Saturday, November 19th, 2022 AT 9:24 PM

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