Well I just got my car back after 2 weeks. The exhaust manifold gasket was changed and the slave cylinder was replaced. Now I got my car and it runs like shit onces I get to about 3500rpm, u can real it start to hesitate. Mind you it hasn't been run for 2 weeks. So I noticed I had a couple bad plug wires so I replaced them. When I start my engine it goes up to 900-1000rpm and goes right back down and turns off. I've run it and tried to drive it and it still does this after a couple hours. What the heck could this be?