Question about 2005 Chevrolet Trailblazer Ext

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At stop rough idle

Why does my 2005 Trailblazer have a rough idle at full stop

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  • Anonymous Dec 12, 2008

    My 2005 Trailblazer just started doing the same thing! Twice today, when I was stopped at a red light it started chugging and felt like it was going to stall

  • Corey Handeland Apr 10, 2013

    CHANGE SPARKS PLUGS. GAP AT .043. i JUST BOUGHT ONE 2005 84,000 MILES. EVERY SPARK PLUG HAD A DIFFERENT GAP.

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  • Chevrolet Master
  • 1,348 Answers

Idle air speed controller.
dirty throttle body
air cleaner clogged
air flow meter
bad injector
leaking intake manifold
vacuum leak
bad plugs
ignition components

Posted on May 13, 2009

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  • 383 Answers

SOURCE: I have a 2005 chevrolet trailblazer that idles

more than likely a vacuum leak get a can of carb cleaner and spray around intake gaskets throttle body vacuum hoses if idle rises or stumbles you have leak in that place

Posted on Nov 22, 2010

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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1 Answer

2005 Chevy Trailblazer idles rough will start to die


What about the Idle Control Valve I know these are a common fault on Ford's, if so you should be able to get away with taking it off and cleaning with something like carb cleaner. Maybe fuel filter needs changing is that the one you meant you changed?

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Usually means the engine bearings are worn out, or the oil pump is weak.
As the oil gets hot, it gets thinner, which reduces pressure. When the engine is at idle speed the pump is not pumping as fast as it is at highway speed.

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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!

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I have a 2005 chevrolet trailblazer that idles rough and stalls at stop lights.


more than likely a vacuum leak get a can of carb cleaner and spray around intake gaskets throttle body vacuum hoses if idle rises or stumbles you have leak in that place

Nov 22, 2010 | 2005 Chevrolet TrailBlazer

1 Answer

2004 Chevy Trailblazer idles rough. Idles ok when started up, but after warmed up it idles really rough when stopped.


If it has not pulled any codes (idiot light). Clean your throttle body, and change your spark plugs with A/C Delcos #41-103, most other brands will cause rough idle like Autolites and Bosch. This would be a cheap way to fix this problem.

If by chance you have just recently changed the battery or had the battery unhooked. Let me know, it's an easier fix that costs virtually nothing.

Nov 18, 2010 | 2004 Chevrolet TrailBlazer

1 Answer

My blazer has a rough idle


Do you have a check engine light on in your dash ?
It may be your throttle body is dirty. Run some SEA FOAM engine tune up in the gas when the tank is about 1/4 full, dump the whole can in, drive it for a while then let it sit. If rough idle continues you may have to pull throttle body and clean.

Feb 05, 2010 | 2002 Chevrolet TrailBlazer

1 Answer

My 2003 chevrolet trailblazer is idleing rough when stopped


I would start by checking the oil level. See where it is at. Did you have the oil changed by a reputable oil change place or dealership? Let me know if the oil is at the correct level on the dipstick and we can go from there.

Jul 31, 2009 | 2003 Chevrolet TrailBlazer

2 Answers

Idles up and down when my 2003 trailblazer is in nuetral


Here is the common problem and fix.

Here are some of the causes of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

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2 Answers

2002 chevy trailblazer has rough idle


it could be an o2 sensor. it could also just need a tune up

Mar 15, 2009 | 2002 Chevrolet TrailBlazer

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