2009 cts v 6 #4 cylinder miss fire under load

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01-07-2017, 12:19 PM

Jimkidmotorsports

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2009 cts v 6 #4 cylinder miss fire under load

I have a miss fire just under load number 4 cylinder 3.6 di replaced coil and plug fuel pressure good

01-07-2017, 05:09 PM

slowroll

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Compression test. Is injector getting pulse? there is no easy way to check if injector is spraying. you could disconnect the other 5 crank engine and see in fuel pressure drops.

01-08-2017, 07:31 AM

Jimkidmotorsports

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Compression good engine will rev up okay after like 2000 rpm no problem

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