When warmed up EGR valve sticks open

Tiny
RICH MITCHELL
  • MEMBER
  • 1995 GMC JIMMY
  • 4.3L
  • 6 CYL
  • 236,000 MILES
EGR valve sticks open only when it warms up. I replaced EGR four times and I replaced the PCM and EGR connector. I am at a loss.
Wednesday, March 13th, 2019 AT 3:42 PM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good evening,

The reason the valve gets stuck open is from carbon that is in the system and it holds the pindle up and it creates a vacuum leak.

The engine has to be de carboned to stop this from happening. There is no issue with the valve or any other component. It is carbon.

Roy
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Friday, March 15th, 2019 AT 7:32 PM

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