I have a 1994 chevy 2500 with a 4.3 L throttle body injection. It is stumbling during acceleration. I read the codes and got a open circuit on the m.A.P. Sensor. After inspection I found the wiring harness on another sensor right next to the m.A.P, it is also connected to manifold pressure. I reconnected the harness and disconnected the battery to erase the fault. It is still stumbling during acceleration and at a certain engine load also. I tested the map and got 300 ohms on the low side 1300 ohms on the high side. Could it be the t.P.S also?
have the same problem?
Sunday, November 12th, 2006 AT 12:54 PM