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Misfire on cylinder 1

prfrmr3

New Member
Joined
Feb 22, 2020
Messages
2
Location
Maroa, IL
I have an 07 Avalanche LT. I have a P0301 code. I have done a compression test and have 120psi. I have swapped out the coil and wire with another cylinder and replaced the spark plug. Still have the misfire on cylinder 1. Any help would be greatly appreciated.
 
Now swap fuel injectors...
 
You have an AFM lifter failure on No 1 cylinder, most common one where the problem starts.

Search the forums for AFM Lifter failure or Google it and you will see whats up. Very common
issue in particular with 07/08 models. First years for AFM..
 
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