I have a 94 T-BirdSC, and the problem started when I had this bucking problem when I was in boost mode. yeeeea boost is nice!!! But N E Ways i changed my plugs and wires and i put bosch platnium plugs which now i figured out that those are theworstplugs 4 these types of cars. But after i put the plugs and wires in the car i drove that day probley about 3 hours and i was at a gas station and i took it up to about 5,500 RPM's and then left the gas station and SC was all slow. Exspecially under boost. the car actually drops rpm's when u hit boost and every time u go into boost the exhaust manifolds glow red along with the cats. Some people said that the cats are clogged but they r not. Another person said that the timing is off so i messed around with the sycronizer thing for the timing where the cam sensor goes on top of. yea so i guess the timing is suppose to be 10 degree's btdc. checked that and it's fine. So i ended up putting autolite plugs in her and she is still doing the same thing i am clueless. Also the harmonic balancer is bent a little, or it's called a vibration dampener it wobbles, i looked in the site and read something about that throwing off the timing. But i dunno i need a car drive so if n e 1 know's n e thing please let me know. Thanks alot.