Is there a "best" cleaner for ISV?

Doyt W. Echelberger Doyt at NWOnline.Net
Sun Dec 15 12:11:05 EST 2002

For the past week, I have been running my 87 5kcstq (267k miles) with the
ISV electrical pig tail disconnected. 100% success in eliminating high idle
(2,000+ RPM!)when coming down off a run, like at a toll booth, and only a
hint of problems when starting cold at 20 degree temperatures in the
morning. I just stay with it on the pedal for about a minute.

Haven't tried other cleaners because the weather is too cold to spend much
time outside messing about with such matters.

After the disconnect, I just used a small flat bladed screwdriver to touch
up the idle speed at the throttle body, so it idles hot at about 800-1000
RPM. This hot setting is a little low for cold start-ups, hence the need
for staying on the pedal at first.

Let me know if you find a magic bullet for the balky ISV. I tried cleaning
mine with carb solvent a few years ago and it helped for a short time.

Doyt Echelberger
Ohio   USA
At 09:01 AM 12/15/2002 -0500, you wrote:
>Cleaning the old ISV with carb cleaner spray resulting in stable idle for
>just a week or so. Anyone found a cleaner that works "best"?
>Mike Aiello
>87 5kcstq, 288k miles, orig. owner

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