Question about 2002 Chevrolet TrailBlazer

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2002 Chevy Trailblazer running rough when idling, especially when its cold. The engine sounds like it is missing. Thought it was because I got some bad gas but still having the problem.I have replaced the fuel filter and ignition coil #2,4,and 6. When i replace the fuel filter i notice the gas that came out of it was very dirty. I have also used the fuel injector cleaner a few times when I filled up with gas.What else could be making my engine run rough?

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Clogged injectors I bet with the dirty fuel you claimed you had in the tank. Cleaners will not remove all contaminates in injectors for they tend to get seized inside of them

Posted on Feb 06, 2010

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