Okay.... I just bought a 96 Tbird Last week runs absutely fine. I get it home and the check engine light comes on. So I throw it on a scanner and it comes up with comes up with two codes, 171 and 174. These caodes are for bank 1 and 2 running lean because HEGO (Heated Exhaust Gas Oxygen sensor) is switching to slow. I kinda got an idea for that problem so on to the next ine..... While driving the car will not respond to WOT. If you press the gas peddle hard enoug to get a down shift it won't respond. Whats known to cause this problem? If it was a 5.0 I would blame the kickdown cable or TV grommet but.... its a completly computer controlled 4.6 so I'm kinda lost in the sauce!!!