Trailblazer has a miss

Asked by Mar 29, 2016 at 07:26 PM about the 2005 Chevrolet TrailBlazer LT 4WD

Question type: Maintenance & Repair

My 2005 trailblazer has a miss while in
park and at red lights no code has ever
come up, I have changed plugs and
insulators,catalytic converter, cleaned
throttle body checked vacuum lines and
it's still missing help please this is getting
expensive

2 Answers

30,055

do a compression check/leak down...

81,715

Possible causes... - Faulty spark plug - Clogged or faulty fuel injector - Faulty ignition coil - Fuel injector harness is open or shorted - Fuel injector circuit poor electrical connection - Ignition coil harness is open or shorted - Ignition coil circuit poor electrical connection - Insufficient cylinder compression - Incorrect fuel pressure - Intake air leak

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