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2009 cts v 6 #4 cylinder miss fire under load

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Old Jan 7, 2017 | 12:19 PM
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Jimkidmotorsports's Avatar
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Default 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
 
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Old Jan 7, 2017 | 05:09 PM
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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.
 
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Old Jan 8, 2017 | 07:31 AM
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Compression good engine will rev up okay after like 2000 rpm no problem
 
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