1995 Chevy Truck idle issue

Tiny
BRYAN FULLER
  • MEMBER
  • 1995 CHEVROLET TRUCK
Transmission problem
1995 Chevy Truck V8 Two Wheel Drive Automatic 200k miles

truck acts like it is stuck in first gear. Idle runs high, even seems to accelerate at times. This is a very intermittent problem and is not happening consistently. I drove truck for about an hour and it did it a few times, then as engine warmed up, it seemed to stop? Not sure? As engine was idling at about 2100 rpm, ( I was coasting at about 20 mph) I shifted truck into neutral, this did not affect the idle speed at all, still reved high. Not actually revving up. Just won't go back to idle speed. Again, it feels like it's stuck in first gear, yet if I switch to neutral, doesn't change the rpm. It is in neutral. Just rev's high. At a stop sigh, after I let off brake, truck accelerated to about 20 mph without me touching accelerator pedal. Then. After a few more minutes of driving around. Stopping, starting, etc. It quits acting weird and goes back to all normal?
Sunday, January 18th, 2009 AT 1:57 PM

4 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Clean out the idle air control valve and also test the throttle position sensor closed/WOT voltages
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Sunday, January 18th, 2009 AT 2:00 PM
Tiny
BRYAN FULLER
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  • 3 POSTS
Can you tell me where to locate the Idle air control value and the trottle position sensor? I can not find the info anywhere.
Thanks
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Sunday, January 18th, 2009 AT 3:22 PM
Tiny
RASMATAZ
  • MECHANIC
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Do you have a repair manual if not get one this is where start-it can get complicated and I need you to follow as I go along to solve the problem

This 2 components are right on the throttle body assembly
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Sunday, January 18th, 2009 AT 3:26 PM
Tiny
BRYAN FULLER
  • MEMBER
  • 3 POSTS
No.I do not have a repair manual. Any way to do it without one?
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Sunday, January 18th, 2009 AT 3:33 PM

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