Raced an 00 Gt last night

No it doesn't do that it comes on pretty much when i'm cruising at a certain speed and stays on for about 5 mins or so. After the first time it done that i had gotten to my destination and i sat there at idle for about 5 mins or so it kinda run rough like a motor mount was broken or somethin. I know it's not the motor mount though. I'm gonna change the fuel filter cuz i've never changed it since i own the car and then i'm gonna go from there. I'm also going to be gettin my rear wheel bearings done this week too.
 
Since the Bullitt was brought up I'll add this. My mom owns one, its number 2998. She has let me race it a few time sta the track. BONE STOCK with only 1200miles on it I ran a 14.1 at 99mph and it was the first time I drove the car, let alone raced it. I recently raced it again, only this time I removed the spare and bolted on my 26x10.5X16 ET streets. I had the ET streets filled with 25lbs of air and I slipped the clutch on the launch so as to not break anything. I ran a 13.5 at 101mph, hell my mom ran it the same day and ran a 13.8 at 99mph in it. Don't count the 99-newer cars out guys.

My buddy Mike (goesby DU302 on the boards) has a '00 GT convertible with a 5 speed. With gears, pulleys, H pipe, TA, optimizer, cat back, and ET streets he has run 13.205 @ 102.71 mph IN HIS VERT! Do you know how much I had to throw at my car to match those numbers??? The main difference I see is that there is a limit as to how far a 2V 4.6 can be taken in terms of ET's and such versus a 5.0L... but we also have a lot more parts available for the 5.0 too.