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1991 idle keeps going up and down (hunting)

Tiny
NAW
  • MEMBER
  • 1991 CHEVROLET CORVETTE
My 1991 corvertte is hunting. When in drive holding the break the idle keeps dropping. It goes up and down. A mechanic say it is hunting. However two dealers could not fix the proplem. They did everything.
stats
1991 convertable
117000 miles
automatic trans.

everything is in good shape

help asap I love this car.
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Sunday, June 24th, 2007 AT 10:13 PM

2 Replies

Tiny
ETTEVROC
  • MEMBER
  • 2 POSTS
91 vette. 79k miles. Same problem here. Any help, anyone.
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Saturday, June 30th, 2007 AT 3:49 PM
Tiny
JOHNLAUG
  • MEMBER
  • 1 POST
I have a 94 automatic that had the same problem. I replaced the EGR valve (exhaust gas recirculation) and that cured the idle. The dealer mechanic put me onto this, of course he was trying to get me to have him do it. The valves are available from aftermarket suppliers (ecklers. Com) and it is not hard to change yourself. Just treat it like a spark plug change and be careful to not get gunk inside the engine when you taake the old one off. The new one should come with the gasket. This tends to be a prblem on cars that are not driven regularly, but daily drivers are not immune.

Hope this helps.
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Monday, July 30th, 2007 AT 6:42 AM

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