1998 Ford Ranger 4x4 4.0L V6 137,000 miles.
had engine code on for o2 sensor let it stay for a while but had it fixed. Bucking became real bad after that. It started only under heavy acceleration but it has become where it bucks and hesitates everytime you give it gas. I replaced o2 sensors, fuel filter, plugs, and cleaned the Mass air flow sensor with carb cleaner, but not the wires. I ran a bottle of Lucas fuel stabilizer and injector cleaner through and the truck ran like a dream without a single stumble, so I dont think it is the wires. As soon as that tank of gas went through however the bucking came back and a lot harder, it not shudders and runs at inconnsistent RPMS at idle, and the exhaust pipe all the way along the truck bounces pretty bad but there is not clamps missing or mounts fallen off for exhaust line. No engine light on and nothing is showing up when I take it to Autozone Please somebody help me, im about to push truck off bridge.
Tuesday, June 26th, 2007 AT 4:12 PM