2004 Chevrolet TrailBlazer Logo
Posted on Sep 11, 2011
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My 2004 chevy trailblazer is missing badly. Had them read the code for me at auto zone and it said I had a miss fire on the number one cylinder. I changed the plugs and it is still missing badly

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  • jasonbadyrka Sep 30, 2011

    I appreciate your follow up... Turned out to be the coil pack and now all is well. Appreciate your support!

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Freddy

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  • Posted on Sep 26, 2011
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Try moving the coil pack from cylinder 1 to another cylinder (swap locations) and see if the same code comes up. If code is different, then coil pack is bad. Other reasons for miss; bad injector, poor compression.
Also, I know you changed plugs already, but always use AC Delco 43-103 plugs on this vehicle.

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  • Posted on Jan 30, 2012
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I have a 2004 trailblazer and put it on a computer it said num 2 plug is miss firing change the coil pack from num 4 to num 2 and still said num 2 miss firing what else could it be...

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Sam Akber

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  • Posted on Sep 30, 2011
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Hi, I wonder if you still need help? if its still missing, if its still #1 even after changing the plug, coil, and injector then I am afraid its the cam lobe or the valve on that particular cylinder.

  • jasonbadyrka Sep 30, 2011

    It was the coil pack and my friend got lit up finding it out.... Anyways, all is well now but I do appreciate both of your help.

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