Question about 1985 Chevrolet Chevy
Im sure it is a vacum hose, I followed the diagram on the radiator sticker however when in defrost vehicle idles high when on floor heat idle goes down
Check the vac pod on the heater case and see if the pod is broken or disconnected
Posted on Dec 05, 2012
Interesting. If it is a vac leak you should be able to plug the line from the intake to kill the leak.
My guess would be the idle speed control is raising the base idle to cover the load the ac compressor would put on the engine.
If the compressor is not working, the computer would not know.
Posted on Dec 05, 2012
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Posted on Jan 02, 2017
SOURCE: vacuum hose diagram got a
I had this problem with my '93 Ford Probe. What happened was the shaft coming out of the vacuum solenoid was onnected to a plastic arm for the valve that rotated for where you want the air to go. This plastic arm was broken over the years of constant use so I make a small metal one.
Posted on Nov 21, 2008
Sounds like a problem with your choke. It may just need to be cleaned (linkages and all). If the choke doesn't close after reaching operating temperature, the engine will rev high. This indicates a choke stuck in the open position. Also, you may need to look for a vacuum leak if cleaning it doesn't fix it. On a 1981 GM product, I'd expect the vacuum hoses to be stiff and cracking.
Posted on May 02, 2009
i would first check for a vacuum leak because this is considered a newer vehicle and does not have an idle screw, so I would get some "brake kleen" and mist it at each vacuum hose, if the idle changes then change that hose it means there is a leak, and that should sove your problem, if it doesnt , I would then check /replace the idle air control valve as this is the motor that controls the idle
Posted on May 26, 2009
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