Car won't go pass 2500rpm, pls help, wants to stall with rev and engine light flickering Options

[malecrod]

Hey Guys, basically I just had my clutch replaced yesterday and the car drove fine. But this afternoon after driving like 3miles the car started hesitating like it wants to stall with some backfires and engine light coming on and off whenever I try accelerating pass 2500rpm. I also noticed engine light comes on for a second whenever I rev the engine pass 5000rpm and let off the gas. Car idle fine with but problem starts when you start to drive. Also I notice tempt shoots up during the hesitations and backfires.
what sucks is I took the car back to the shop that replace the clutch, he tells me the car was doing that before I brought it in, But I know for a fact it was not. Any ideas what the cause might be? Any help would be appreciated.
Thanks
Eli

[malecrod]

An update on my problem: I checked for engine codes this morning and it was normal(constant flashes no pauses). Checked the grounding to tranny and it was fine also. This morning it was still hesistating at around 2500rpm(making a puff puff puff, idle dropping, tempt needle jerking, and engine light flickering), but it never stalls. Then I was kinda trying to see if I revving it up slowly in neutral will make it pass the 2500rpm mark.. and it did! And all of a sudden the problem just went away. I drove it for about a mile to see and it drove fine with no recurrence. Kind of strange. Seems like some kind of intermittent problems?
Thanks guys