Question about 2005 Chevrolet TrailBlazer

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Cylinder 6 misfiring

Changed spark plug already and rotated coils and still reads cylinder 6 misfire

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Did you also swap #6 plug wire with another cylinder

Posted on Sep 09, 2009

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Posted on Jan 02, 2017

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Misfire on number 6. changed spark plugs and coil, still reads misfire on number 6


What vehicle?

Spark plugs never misfire, by design, Wear yes,that stresses the
ignition modules

If you have a coil, that is for all cylinders,the others fire okey !

We need your year,engine, V6, V8, etc, to help

You never change parts to solve any issue
That is called wishing,hoping,pushing,poking,

What code # did you get PO306?

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