97redgt

I went out and got my 97 gt off some guy. He had some upgrade put on it. My problem is when I try to take off I have to it 2000 before letting out of the clutch. The car idles down to 500 when at run temp. I can smell gas like no other from the exhaust. I can unplug the maf and run a little better. I can't get on it. It try to go but it feels like a fuel cut. He had put on msd all the way around and the msd plus 6 box. It has bbk intake, bbk tb, bbk h pipe, bbk fuel pump, bbk fuel regulator, all the o2 have been replace, change the temp swich, change the maf, change the coils. I'm running out of thing to replace. It also runs better when it's cold out. I've check for a vacuum leak and got nothing. So if you can think of anything let me know. Thanks