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I have a 2006 Chevy Trailblazer LS I just replace the throttle body I was having problems with low Idle and when I would turn on the AC the car would shake I'm still having the low idle with the air conditioning off and on my rpm is at about 500 and 550 how can I fix this?

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Sounds like a idle control valve or sensor the sensor has a pintle with a spring from the housing to the tip of the pintle can't be more than 1 1/8 check yours or buy a new one but you still have to measure the new one before you put it in then drive the car at 40mph for 10-15 seconds Straight so it can reset itself

Posted on Mar 28, 2014

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Posted on Jan 02, 2017

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SOURCE: ford freestar, idle is wierd,

try a tune up

Posted on Jun 11, 2009

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SOURCE: idle problem on a 2006 chevy trailblazer 4.2

The code indicates an issue with the Throttle Actuator control. This is a little motor on the throttle body that opens the throttle plates at idle. That control motor may be bad and thus, causing a low idle.

I hope this helps.

Posted on Jul 21, 2009

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SOURCE: Air conditioning causes car to idle or die.

Depending on whether your car is Injected or Carby induction, The aircon system has an IDLE UP circuit which is supposed to raise the Idle while the Aircon Compressor is engaged. The Compressor cycles on & off to charge the system pressure as required. The Idle up system typically uses an IDLE UP SOLENOID which is usually mounted directly on the throttle linkage at the Carby or Throttle body itself, or a Vacuum Solenoid which switches vacuum to a Diaphram which is connected to a linkage on the Carby or Throttle body itself, or a Vacuum Switch which ports air into the throttle body to raise idle (This type on injected vehicles only). It sounds as if the IDLE UP system has failed or is not adjusted properly. Revving the engine spins the compressor faster thus charging the system sufficiently to dis-engage the compressor, which in turn removes the load from the engine, allowing it to idle again. A simple way to test is to disconnect the Aircon clutch wire (make sure it cannot fall into belt) & switch on the Air with the engine running. The RPM should raise typically around 300 RPM. If it doesn't the IDLE UP is not working. Hope this helps.

Posted on Dec 07, 2009

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SOURCE: 2003 toyota sienna idle problem

After about 100K + miles the idle air control valve (IAC) begins to collect carbon deposits that interfere with the movement of the spring-loaded valve. You will not be able to clean this without removal and dissembly of the IAC body. Use an emory cloth or fine sandpaper to remove the build up around the valve. This should free it up to rotate without binding. This is a temporary fix, of course, and will either require cleaning again or replacement of the valve. Getting to the IAC requires removal of most of the intake upto, but not including, the intake manifold. Total time is approximately 3-4 hours, but worth it. Good luck, and I hope this helps.

Posted on Feb 21, 2010

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SOURCE: LOW IDLE

idle is factory set on the computer (UNDER NO LOAD)SO IF YOU TURN ON THE A/C IT WILL IDLE LOW,BUT WONT VIBRATE BADLY.NO ADJUSTMENT IS AVAILABLE.

Posted on Jun 25, 2010

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I hope this helps.

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