Several things could be causing this. First, have you checked the computer to see if there are trouble codes stored? Have you checked fuel pump pressure to make sure it is within the manufacturer's specs and the pump is producing proper pressure and the regulator is working properly? When was the last tune up?
Let me know the answers to the above questions. Also, just FYI, if this is a 4.3L, they had problems with the spider under the intake (the injection system). The regulator would go bad and cause similar issues. Let me know the above answers first, then we can go from that point. NOTE: I will need you to check the function of the fuel pump and fuel pressure regulator.
Wednesday, May 21st, 2014 AT 5:58 PM