Buick Century 2.2 EFI with OBD 1.5. Car hesitates at speed (kind of bucks), and it sometimes idles high when sitting. I've replaced the plugs, wires, air filter, fuel filter, fuel pump, and throttle position sensor. The hesitation doesn't happen all the time, but does happen quite a bit.
Wednesday, September 19th, 2012 AT 5:21 PM