1991 Chevrolet G Series Van (G20) Questions

Unanswered 1991 Chevrolet G Series Van (G20) Questions

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i changed the fuel pump i checked the map sensor with bobby pin no change i also checked oil sending unit changed fuel filter and i cleaned the throttle body and injectors. i checked all the fuses i am stumped and won...
I have tightened the battery cables once and it came back on.
computer light flashes on dash 6 times. what does it mean.
need computer codes flashes 6 times what does this mean