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Miss firing issues


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ron36535's Avatar
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August 12th, 2017, 3:50 PM   #1  
Miss firing issues

2005 Silverado 1500 4.8 automatic.

Cylinder 5 is showing miss firing. I have replaced the fuel injector, moved the plug, wire and coil to a different plug that is not missing. I am still getting the miss fire ! help please.

 
kevinkpk's Avatar
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August 12th, 2017, 5:19 PM   #2  
Miles? You might have a piston ring issue, can you do a compression check?

 
ron36535's Avatar
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August 12th, 2017, 7:18 PM   #3  
Posted By: kevinkpk Miles? You might have a piston ring issue, can you do a compression check?
90,000 miles. I would have to work on getting the tool for that.

 
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August 13th, 2017, 8:40 AM   #4  
Have you looked at the spark plug?

 
ron36535's Avatar
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August 13th, 2017, 1:10 PM   #5  
Yes, if you look at my first post, I swapped the spark plug, wire, and coil to a known good cylinder. also
checked wiring with a noid light.

 
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