2002 Chevrolet Trailblazer General Question

the 2002 Chevrolet Trailblazer has the 4.2 motor. number 5 cylinder has a miss. plugs have about 50k on them. seems to get worse under a load.

Posted Apr 23rd by Jim Sherwood the owner of a Chevrolet Trailblazer Chevrolet, Trailblazer, cylinder

Answers from the Automotive Experts

Jim, If you have replaced your spark plugs, and wires, and still have a misfire on #5 you can switch out the coil pack with its neighboring coil pack. If your miss fire moves to the replaced cylinder, then replace that one coil pack.

⟩ Answered on Apr 23rd, 2015 by Amanda J. Pierce, MBA "AJ", Certified Mechanic at VIGOR Alaska Industrial Shipyard

Sounds like it needs coils - tune up item

⟩ Answered on Apr 23rd, 2015 by Gelina Aquilina, Service Advisor / Mechanic at

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