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.

 

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.

 

Have you looked at the spark plug?

 

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.