Ok, I have a question for you. Don't know if you can help me, but I am hoping someone on here will have some knowledge of this and maybe some insight as to what is wrong. I had a no-win situation here. I had raced a Mustang GT and was coming up to a red light. (I beat the Mustang) I hit my brakes and nothing. All this happened in a split-second. I thought I have two choices here, either hit traffic going accross the street or downshift into 2nd going 80MPH. Well, I don't want to hit someone, so I downshifted into 2nd. Well, the tach maxed out at 8000RPM's. It still runs, but sounds weird sometimes now. I replaced all 4 plugs, cap and rotor that very day. Tried that, just in case. Not it. When on boost I can feel it hesitating sometimes, like I'll have it floored, and it'll be ok, then I can feel it lagging for a sec, then it stops, then does it again, very irraticly though. But it sounds funny all the time, all RPM's I mean, even before turbo spools up. I don't know what I did. Some suggestions I have had from friends are 1: I messed up my valves; 2: Bent my turbos impeller, or fan, whatever it is called; 3: blew my turbo seals.. What do you guys think? None of the people who told me these things have turbo cars, all have Honda's, actually. (damn Honda's) Please help me if you can, I don't know what is wrong. I am afraid it may be something really bad, but can't seem to find a shop that I trust. I get mechs. telling me this and that, and trying to rip me off. My usual mech. doesn't work with upgraded cars. He does everything, just won't doesn't know about cars like mine with aftermarket stuff done to it. He won't touch it. Please help me!!! Thanks.