Engine will not idle

BOBC789

MEMBER
1992 CHEVROLET CORSICA
3.1L
6 CYL
2WD
AUTOMATIC
177,834 MILES

I was warming it up, I was going to check tyranny fluid. It was idling just fine, then a small miss and it just stopped running. I started it up and it ran fine as long as I was giving it gas but as soon as I let off it just shuts off and won't idle. I just replaced the fuel pump, and it ran fine the day before. Any help would be appreciated.

Sunday, May 8th, 2022 AT 5:44 PM

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
51,685 POSTS

It sounds like you have a vacuum leak, or the throttle bore is gritty and needs service. here are guides that can help us fix it please go over them and get back to me:

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

and

https://www.2carpros.com/articles/throttle-actuator-service

and

https://www.2carpros.com/articles/stall-at-idle

Please run down these guides and report back.

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Monday, May 9th, 2022 AT 11:01 AM

BOBC789

MEMBER
2 POSTS

Ken, I just now found your reply, thank you. While I was waiting, I found a real thin vacuum line that ran from a thick line coming out the back of my engine, then it reduced down and split off in different directions. One went around the driver's side, then just stopped under my battery. I could not find where it went so, I plugged it. Then I cleaned out my throttle body with Sea foam, took it for a ride with the pedal to the floor, came back, it's just purring. You just actually nailed everything I did, and you were spot on brother, well done. I'd still like to know where that spaghetti line that I plugged went to. Ken thank you kindly, Blessings be to you.

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Friday, May 13th, 2022 AT 10:49 AM

KEN L