Stalling randomly when the idle gets too low

Tiny
MCGRINDER22
  • MEMBER
  • 2002 GMC YUKON
  • 5.3L
  • V6
  • 2WD
  • AUTOMATIC
  • 283,000 MILES
My SUV has been stalling when I start to come to a stop or slow down to make a turn or just randomly when the truck starts idling too low. I was told that I needed to change the mass airflow sensor, but I just changed it and the truck is still doing the same thing as it was before. What could be some other causes of this?
Wednesday, March 27th, 2019 AT 2:05 PM

1 Reply

Tiny
SEVAG P
  • MECHANIC
  • 405 POSTS
Hello thanks for using 2CarPros.

it seems the idle control valve is the problem or vacuum leak that leans up the mixture and engine stalls.

As a first step you must read the fault codes:
https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Run our guide for engine stalls:
https://www.2carpros.com/articles/stall-at-idle

https://www.2carpros.com/articles/engine-stalls

Our guide how to replace idle control valve:
https://www.2carpros.com/articles/how-to-replace-an-idle-speed-control-motor-iac
and checking for vacuum leak.

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

Please send us feed back if you get any fault codes.
Thank you

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Wednesday, March 27th, 2019 AT 2:33 PM

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