Question about 2006 Chevrolet Colorado

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2006 Chevy Colorado, rough idle when cold

When I first start the engine, and it is cold it has an extremely rough idle. I need to step on the gas slightly until it warms up or else it wants to stall. If the engine is warm and is started it idles just fine. any help or suggestions with this problem would be greatly appreciated, thanks

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  • Jeff Lee Feb 18, 2009

    This is in regaurds to my '06 Chevy Colorado With the rough cold start. The head was replaced at approx. 55,000 miles, I now have about 66, it's been a year, the check engine light has been on ever since the head has been replaced. My cold start problem started about 2 months ago, and has been steadily getting worse. I would appreciate any kind of feedback. thanks

  • Bruce Bracey
    Bruce Bracey May 11, 2010

    Do you have a service engine soon light on at anytime?

    Let me know,

    Regards.

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Mine did the same thing at 16K miles, I cleaned the throttle body and the ploblem went away. Took me about 30 minutes.

Posted on Feb 28, 2009

6 Suggested Answers

c17hydro
  • 2984 Answers

SOURCE: how do i change out the knock sensor on a 2006 chevy colorado

You didn't list your engine size so please pick the applicable to your motor size:

Removal & Installation 2.8L & 2.9L Engines To Remove:

  1. Lift the vehicle high enough to gain access to the knock sensor (KS) through the left front wheelhouse.
  2. Remove the left front wheel and wheelhouse liner.
Knock sensor (KS) (A), Engine harness (B), Knock sensor (KS) connector (C)


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  1. Disconnect the knock sensor (KS) connector.
  2. Detach the knock sensor (KS) from the engine block.
To Install:
  1. Attach the knock sensor (KS) to the engine block.
    • Tighten the bolt to 18 ft lbs (25 Nm).
  2. Connect the knock sensor (KS) connector.
  3. Install the left front wheelhouse liner and wheel.
  4. Fully lower the vehicle.

Posted on Sep 03, 2009

GregV24CHOPP
  • 11 Answers

SOURCE: when cold, it idles rough, revs high then low! After warmed up it runs fine

if it runs high when you first start it then mellows out,, theirs no problem , all of our chevys do that.... but if its sputtering or you hear a quiet popping noise check spark plugs

Posted on May 20, 2009

  • 1 Answer

SOURCE: Rough idle

I had the same exact problem on my 2004 Colorado (3.5L). Cleaned the MAF sensor (with MAF sensor cleaner) and throttle body/plate - cleared it right up.

Posted on Aug 24, 2009

wracefans24
  • 1985 Answers

SOURCE: 1994 GMC Jimmy engine runs rough when cold; smooths out when warm

you need to have the codes checked to know what direction to start repairs,Autozone does this for free

Posted on Jan 20, 2010

  • 98 Answers

SOURCE: idles rough after engine is warm

check ALL vacuum lines for cracks/holes and replace as nesissary

Posted on Feb 25, 2010

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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Rough idle


I had the same exact problem on my 2004 Colorado (3.5L). Cleaned the MAF sensor (with MAF sensor cleaner) and throttle body/plate - cleared it right up.

May 10, 2009 | 2006 Chevrolet Colorado

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