Question about 2005 Chevrolet TrailBlazer

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2005 chevy trailblazer 4.2 engine. Was driving on interstate engine intermittently began to run rough similar to a miss. Then check engine light was blinking for a minute or two then went off and engine ran smooth. Problem reoccurred several times, then once off the interstate pulled up to a red light and engine at idle was very rough, changining between 500-650 rpms. Parked the vehicle for several hours then drove it again, ran smooth till engine warmed up then the rough idle began. The check engine light is off now.

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  • andrewcaple2 Mar 27, 2011

    On the second tank now still having the issue

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Sounds like it is the EVAP and I think there is a TSB on this that the dealership should fix for you.

Posted on Jul 10, 2012

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Sounds like you might have gotten some bad gas, Try a bottle of HEAT. good luck

Posted on Mar 27, 2011

  • Steve Christmas
    Steve Christmas Mar 27, 2011

    does your vehical have injectors?sorry this is hard without knowing what i'm dealing with, you explained well but just so hard to run things through you mind and get a picture of whats going on.

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