Question about 1989 Chevrolet C/K 3500
I have a 89 chevy van with a 305. it started to back fire and cut out. this seems to happen when the motor gets up to driving temp. i ran the codes and got 32-egr circuit and 45 oxegyn sensor (rich). i poored sea foam into throttle body to clean up the intake this gave me more power back. then i replaced the oxygen sensor. this to made a little improvement. but still back firing through throttle body. i cleared codes after test drive so they are no longer reading. can some one please help me with this?
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Posted on Jan 02, 2017
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