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Old 09-14-2013, 03:33 PM
jonesrsrg jonesrsrg is offline
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miss fire on number 2 cyclinder

2002 trailblazer Ls 4.2 I scanned the codes and it was p0302 and it was number 2 cylinder miss fire can anyone help me figure out this problem.
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Old 09-14-2013, 10:30 PM
Schurkey Schurkey is offline
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Re: miss fire on number 2 cyclinder

Poor compression
Fouled or worn spark plug
Defective ignition coil or ignition coil wiring
Defective ECM failing to drive ignition coil
Defective fuel injector or fuel injector wiring
Defective ECM, failing to drive fuel injector

I'd yank out the spark plug(s) for inspection and compression testing.

Will the coil fire an HEI-style spark tester?
http://www.amazon.com/dp/B0002STSBC/...=I7V84Q7FKSUDV

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