1986 GMC Sierra breaks up and loss of power when call for power
I adjusted the timing based off of cylinder number one being on top dead
center. I inspected the distributor gear it was ok. New spark plugs new spark
plug wires new fuel filter new distributor cap and rotor.
You have a carburetor correct?
Yes the truck sat since 2003
PROBABLY NEEDS CARB REBUILD WOULD BE GUMMED UP FROM SITTING
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