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How to test idle control valve 89 240 200

posted by  machine man on  Fri Oct 31 08:11 CST 2008
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last visit: Wed Oct 22 15:40 CST 2014
[RELATED]

THE TEST:

The car should always rev the engine up slightly higher than the set idle when starting. The settle back to the set idle. If you listen for it when starting, you know the motor hasn't failed.


Ater cleaning you should be able to quickly twist the whole thing and get the valve to flop open and closed. The wire check will confirm it powers up.

I you think it needs lube only use a splash of silicone spray. You don't want anything that will collect gunk.


If it does that now, but stays high I would look for either a leaky hose or sticking dirty throttle valve plate. They can go hand in hand with the smut (oil vapors) that get around from that great flame trap invention. Got to keep it serviced for less problems. Of course you know where that is. In that neglecting land down under!





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