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post #1 of (permalink) Old 07-27-2000, 09:14 PM
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Idle and air conditioning

on my 90 jimmy 4.3 i just got the air charged and now when the air is on the idle doesn`t go up and the charge gauge goes way down on idle.Anyone have this problem?

1990 blazer 4.3
1991 blazer 4 dr 4.3
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post #2 of (permalink) Old 07-28-2000, 07:49 AM
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Re: Idle and air conditioning

Your idle is controled by the computer, and it should stay about the same with the air on or off. If your volt meter is going on the low side, take a volt meter and put it across the battery terminals and check what the voltage is with the truck running, headlights on, blower motor on high, and if it is below 13 volts, then the voltage regulator in your alternator is probably bad. I hope this helps.
David G.

'91 S15 Jimmy 5.7L 4X4
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post #3 of (permalink) Old 07-28-2000, 09:24 AM
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Re: Idle and air conditioning

It's not vacuum controlled? Most other systems have some sort of bleed valve that's supposed to supply more vacuum to keep the idle up. If this was adjusted to specifications it might show that you're running really low on idle. Crank up that valve and it'll raise your idle accordingly.

Does the fan clutch engage when you have it on regularly? Or does it take a long time for the clutch to engage?

J.R. [img]/wwwthreads_images/icons/cool.gif[/img]
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