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Air Conditioning idling speed 200 1978

posted by  Klaus Fluoride on  Thu Feb 27 17:03 CST 2003
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last visit: Mon Mar 30 15:07 CST 2009
[RELATED]

How do I notch up the idling a little to compensate for loss of power and engine cutting out when I'm running the airconditioner. Current idling is about 900 rpm, is it ok to go a little higher to keep it ticking over when I'm stopped in traffic. At the moment I'm switching off the a/c when I'm approaching traffic lights etc, very annoying.
1978 245 DL, Fuel injection.








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    Air Conditioning idling speed 200 1978

    posted by  someone claiming to be joe on  Fri Feb 28 03:07 CST 2003 [RELATED]

    My '78 has an a/c fast idle solenoid on the intake manifold. It's located
    near the big plastic idle adjustment screw.








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    Air Conditioning idling speed 200 1978

    uid 27's pic
    posted by  Art Benstein on  Fri Feb 28 03:06 CST 2003
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    last visit: Fri Oct 17 20:10 CST 2014
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    Things 240 were changing pretty fast in 78-79, but my 79 has a solenoid valve on the firewall designed to do just that. If you find one in yours, you could test its function theoretically, by disconnecting the AC clutch wire and then operating the AC switch to hear the change in idle speed. Failing that, you could check the solenoid for electrical function and then to see the vacuum (bypass air) was being switched by it. In mine, if I remember right, the solenoid's switched vacuum controls another, larger bypass valve at the throttle body. My recollection is based on mine having been defective and searching for a replacement in the junkyard.

    Let me know if yours has the solenoid valve on the firewall. I can get more info from manuals, pix and looking at mine.
    --
    Art Benstein near Baltimore







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