Misfire #1 cylinder

Asked by Tracy Sep 06, 2020 at 05:26 PM about the 2006 Buick LaCrosse CXS FWD

Question type: Maintenance & Repair

It slowly developed a misfire, first at low rpm
and go away at higher rpm. Code reader said
it was injector 1. Now it’s constant. Replaced
injector, plug, coil, still no change! 3.6L gm

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