Question about 2004 Chevrolet TrailBlazer

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Everytime I cut on the defrost, a/c, or heat, my idol drops and my truck tries to stal/l. What causes that

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The throttle body needs to be cleaned, grime in this area prevents the throttle plate from closing completely and allowing air to enter, making the air/fuel mixture lean.

Posted on Oct 26, 2010

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2 Answers

When in idol the air and heat fan when turned on high kick into low


It sounds like the fan control switch or fan motor before having these checked have the alternator serpentine drive belt and battery checked

Jan 13, 2015 | 2006 Chevrolet Trailblazer

1 Answer

My ford freestar keeps cutting off when starting.


It sounds like what mine does. After it dries out it will run again. Idols at over 2000 in nuetral, when nuetral idol goes back to normal everything should work again.Pretty sure its in the PCM. There is a safety bulletin out on it, not a recall. I blow heat on mine for a couple of days and it will do fine for a while. Did it today and hasn't rained for more than a week?

Dec 07, 2012 | 2005 Ford Freestar

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My Saab 900 se turbo 2.0l 4 cylinder Stals out when I push down on the gas pedal. If I release soon enough it cuts back in. any solutions?


Likely has a vacuum hose leak. The hoses all die from the massive heat generated by the turbo engines. Check all the ones on the throttle for cracks.

Mar 22, 2012 | 1996 Saab 900

1 Answer

What would cause my 2003 ford escape to idle around 2000 to 3000 rpm after it has been running for a while. it runs fine when it is first started up.


If your A/C is on , or you are running the climate control in the defrost windshield mode , the engine will idol higher than normal.
A Vacuum leak could also cause a high idol.. check the vacuum lines and be sure they are in good condition and all plugged in.

Jul 15, 2010 | 2003 Ford Escape

1 Answer

Overheating and no heater while doing so


Replace the oil sending unit,and see if the light will go off.Next fill radiator up full,and or reservoir.Then bleed the cooling system of air.This will cause the engine to run hot,and no heat inside the car.The best way to bleed it is to,fill reservoir up full,to top,run engine and cut engine off before it gets hot,about 218,then wait about 30 to 45 minutes and check level in reservoir.It should have dropped.Refill,and repeat untill engine runs cool,and cooling fans cut on,and cut off by themselves.Do this with ac and defrost off.I hope this will help.

Oct 06, 2009 | 1998 Ford Taurus

1 Answer

Car cuts out when idoling


The idle system has gone bad in your car. Did anyone work on the AC? An overcharged ac also put so much load on the engine that it can make it stall when idling. The idle sytem is suppose to raise up the idle of the engine when there is a load such as a headlight or an ac system.

Jun 29, 2009 | 2002 Mitsubishi Galant

1 Answer

01 xj jeep revs up at idol


That is completely normal for your jeep product idol ranges it does this while warming up it should drop back to 800 when completely warm or when you put it in drive and everything is a go try using a better spark plug from AC DELCO lifetime warranty ones that'll keep some of the heat under control and abnormalities in your jeep product don't forget to change your timing belt at correct interval if not sure when that is call your local dealer and ask the service dept at how many miles should you bring in for timing belt change but of course you can change the belt your self with a little determination and knowledge. wutxtye0rjd9d9ekmodqt1eoxkvn9hr9qjz1l3dabggyud7sdgr36czsrfxqenadhnijx9nfayi+sz1sug0aaaaasuvork5cyii=

Apr 22, 2009 | 2001 Jeep Grand Cherokee

1 Answer

The heating unit blows air from defroster and floor only


defrost is a default if vaccum is lost from engine.. check behind batt in engine comp to see if batt has been leaking. this can cause the acid to drip on small black vacc lines from engine and cause a leak in the vacc system causing it to only blow in defrost . you can fix by cutting damagged vaccumm line and install a small rubber hose over cut ends .. the vaccum lines run between batt and fire wall

Mar 10, 2009 | 2003 Ford F150 Regular Cab

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