1982 Holden Rodeo engine rev by itself

Tiny
MAVERICK12TH
  • MEMBER
  • 1982 HOLDEN RODEO
  • 2.6L
  • 4 CYL
  • 4WD
  • MANUAL
After the engine is warm and driven for 20 mins engine revs high and when stopped at lights in neutral or 1st gear engine begin to rev up and down by itself. I have found that if I "ride" balance the clutch it eliminate the rev up and down but still revs high.
Wednesday, March 18th, 2015 AT 3:57 AM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
Is this vehicle fuel injected or does it have a carb?
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Thursday, March 19th, 2015 AT 1:18 PM
Tiny
MAVERICK12TH
  • MEMBER
  • 2 POSTS
Fuel injection
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Thursday, March 19th, 2015 AT 1:56 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
I suspect there is either a vacuum leak or the idle air control valve (IAC and mounted to the throttle body) is the problem. Check for leaks first. If none are found, then the IAC is what I suspect.
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Saturday, March 21st, 2015 AT 9:52 PM

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