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2002 trailblazer wont idle with ac on and shuts off

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There is an idle circuit that is built into the programming. Also the compressor could be locked up and do the same thing. Loosen the belt and see if itwill turn by hand.

Posted on Oct 12, 2009


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1 Answer

I changed the water pump on my 2002 trailblazer LS and now it when i turn the AC on it will not idle and will shut off. What do I need to do to correct his issue?


Sep 19, 2011 | 2002 Chevrolet TrailBlazer

1 Answer

The idle on my 2005 trailblazer is low , and the vehicle shuts-down whenever I turn on the ac.

You vehicle has an idle air solenoid that increases engine speed under a load at idle , they get carbon build up and stop working, some can be cleaned some have to be replaced, ck with your local mechanic, he may just clean it!

Apr 19, 2011 | 2005 Chevrolet TrailBlazer

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May 05, 2010 | 2002 Chevrolet TrailBlazer

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Car shutting off when air condition is turn on causing it to stall

There is a switch that works the computer upon turning on the air conditioning. Upon turning the AC on the switch sends a signal to the computer to increase the RPM's to the engine so it will not die out

Jan 16, 2010 | 2002 Chevrolet TrailBlazer

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Same problem motor shutting off when turning the AC at a low idle

I don't tjink your a/c is directly killing the engine. The electrical load it demands may be the issue. Hve your battery checked and your alternater outout. The alt. is supposed to ofset the loads imposed on the battery so as not to ppermit the battery to drop below what is needed to satisfy other accessories which are on orrunning. The charging voltage output of the alt is 13.6 - 14.2v @ 13,6v the alt is charging near its capacity. and 14.2 it is backing off. The lower the voltage the higher the amps. Constantly running @ or below 13.6 will shorten the lufe of the alt due to hear builup damage. Have your battery load tested w/engine off. Then ck the alternater output engine running @ 800 rpms. Alternaters, unlike the old generators, charge from the minute it starts turning, where a generatoter has to have speed to generate anything. Watch what the alternator does when you turn the a/c on and off. or simply watch the battery readinsgs when you turn each accessory on. like the headlights... Good Luck

Aug 24, 2009 | 2002 Chevrolet TrailBlazer

2 Answers

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Get the mounts fixed asap,and go back to the dealer,let them put the idle back where it belongs.The AC need the extra horse power to work properly.You got the right Idea.

Jul 27, 2009 | 2002 Chevrolet TrailBlazer

2 Answers

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if your engine tries to stall when you turn on the ac then there is a posibility that your ac compressor is locked up

Jul 08, 2009 | 2002 Chevrolet TrailBlazer

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2002 Chevy Trailblazer idle down cut off when heater or AC is on

most of the time computer just needs to relearn itself. should straighten itself out after a drive.if not try cleaning the throttle plate

Dec 03, 2008 | 2002 Chevrolet TrailBlazer

1 Answer

2002Chevy trailblazer engine cuts off when heater & ac is on

remove the airintake boot and clean throttle butterfly with a rag and carb cleaner

Dec 03, 2008 | 2002 Chevrolet TrailBlazer

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