Why does A/C cut out at idle?

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Jun 5, 2008 | 06:49 PM

#21

abecedarian

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Joined: Mar 2008

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From: Temecula Valley, CA

go back and look at https://www.yotatech.com/forums/f116.../#post50845429

Jun 5, 2008 | 07:47 PM

#22

4Crawler

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Joined: Jun 2002

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From: SF Bay Area, CA

Quote:

Originally Posted by 94svt50

Checked it out today, at idle speeds the compressor clutch is cutting out. If you rev it up just a bit and it kicks on. I tried adjusting the vacuum screw in the above photo but it made no difference, no mater which way I turned the screw. So, I just turned up the idle speed at the throttle body to keep the a/c on. Any reason why adjusting the vacuum screw would not work?

There are two adjustments as I described earlier. The idle up valve adjusts the idle speed and the A/C Amplifier knob adjusts the cutout RPM. They sort of work in concert, the A/C Amp says if RPM > cutout then let the A/C turn on. And if the A/C is on, open the VSV that feeds the idle up valve to boost the idle speed. But if RPM < cutoff, turn the A/C off. Adjust the "RPM" knob on the A/C Amplifier, that is located behind the glove box.

Jun 16, 2012 | 10:33 AM

#23

edeslaur

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Joined: Aug 2009

Posts: 299

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From: Sandy Eggo

Here are the steps I followed to get mine working

Here's a shot of the AC Amplifier above the glovebox. Thanks, 4Crawler. I have no idea what I'd do without your posts. BTW, starter contacts completely solved my starter issues, so I kept the rest out of respect for all your posts!! (it's just a few cents, but it's the time you're saving, man!!)