I have a 1991 Buick Lesabre. When under a load it sometimes bucks around 45 to 55 miles an hour. From a dead stop if you punch it it will pop through the throddle body. Any Ideas out there??? I thought it was fuel related but I have changed the fuel filter and fuel pump, Also changed the plugs wires and pcv valve. graemlins/shield.gif :confused:

Ok I took it to the dealer today and talked to one of the mechanics he didn't give me to much info but he said it sounds like I have a bad TCC which controls the torque converter. Does anybody know were the TCC would be located?