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I have a 1988 chevy g10 van with a 4.3 engine. The engine runs rough all the time. I changed the plugs, wires, distributor cap and rotor AND the EGR valve. I checked the timing, all is ok. The van was parked for about three years when I got it. It is fuel injected so I sprayed the top of the carburator and jets but it still runs rough. What else can I check?

Optional Information:
1988 Chevrolet g10 4.3

Already Tried:
complete tune up

Customer (name blocked for privacy)

Status: Closed Value: $8

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