04 trailblazer

Asked by Guru5TGC8 Jan 04, 2018 at 06:50 PM about the 2004 Chevrolet Trailblazer LT 4WD

Question type: Maintenance & Repair

I just bought a 2004 trailblazer ran good i drove it
home i wanted to change plugs cuz of bad gas
mileage long story short i change plugs and now
misfire on cylinder 1 only i plug it in on my
computer brought up cylinder 1 misfire so i figured
it was the plug bought all new plugs nope still
misfire on cylinder 1 so i bought all new coils still
misfire on cylinder 1 so now im thinking about
changing the ignition coil connector

3 Answers
11,575

FJ4072 answered 6 years ago

Triple check the connection of the coil onto the sparkplug. Feel and listen for the click. Also, the I6 engine loves the AC Delco 41-103 plugs. Others have been known not to work very well.

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