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1994 Buick Lesabre car stalls when dropping RPM

Tiny
MITCHOMAN
  • MEMBER
  • 1994 BUICK LESABRE
  • 3.8L
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 100,000 MILES
Hey my buick lesabre is having troubles, itll start up and idle fine no problem and drive fine but sometimes when im driving and let off the gas as the rpms drop itll stall. Causing me to put it in neutral. Start up again. Its getting old. Wondering what the problem could possibly be it doesnt happen all the time either only sometimes while driving, thanks for your time! I appreciate it
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Tuesday, February 10th, 2015 AT 4:38 AM

2 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Clean throttle plate on both sides and iac hole with choke cleaner
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Tuesday, February 10th, 2015 AT 5:44 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
It sounds like you may have a vacuum leek, please use this guide when the engine is cold only.

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

This guide can help as well.

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

Here is how to service the throttle body like HMAC300 is advising with instructions below to show you how on your car.

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

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Saturday, July 6th, 2024 AT 2:04 PM

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