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Revs in park

Tiny
TLTOUMBS246
  • MEMBER
  • 1991 BUICK PARK AVENUE
  • AUTOMATIC
  • 140,000 MILES
My car is running rough and three service engine light is off and on. They connected the code reader, but my car was not putting out power to the reader. When I put the car in park, it revs then almost shuts off, revs, almost shuts off. Sometimes it just quits running. Any help is appreciated.
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Tuesday, August 21st, 2018 AT 12:45 PM

5 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
In 1991 the car is OBD1 so you will need to follow this guide to get the codes.

https://www.2carpros.com/articles/buick-cadillac-chevy-gmc-oldsmobile-pontiac-gm-1983-1995-obd1-code-definitions-and-retrieval-method

This guide can help as well.

https://www.2carpros.com/articles/engine-idles-too-high

Please run down these guides and report back.

Cheers, Ken
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Thursday, August 23rd, 2018 AT 10:16 AM
Tiny
TLTOUMBS246
  • MEMBER
  • 3 POSTS
Thanks Ken. One code was the lean exhaust. The second link you sent has a ton of useful information! I will let you know what we figure out. Thanks again!
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Friday, August 24th, 2018 AT 4:09 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
Please let us know what you find. We are interested to see what it is.

Cheers, Ken
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Saturday, August 25th, 2018 AT 11:43 AM
Tiny
TLTOUMBS246
  • MEMBER
  • 3 POSTS
It was the air control valve. It took the mechanic a few days to figure it out though. Thanks Ken!
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Wednesday, August 29th, 2018 AT 2:32 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
Yes, that is where we were headed. ;) Use 2CarPros anytime, we are here to help. Please tell a friend.

Cheers, Ken
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Thursday, August 30th, 2018 AT 9:47 AM

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