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

[Rjb23]

When they replaced your clutch did they unplug your battery? If it was unplugged for any long amount of time the ecu has to completly relearn and it may run like crap for a little bit until it relearns, it may have been that.

[malecrod]

When they replaced your clutch did they unplug your battery? If it was unplugged for any long amount of time the ecu has to completly relearn and it may run like crap for a little bit until it relearns, it may have been that.

Yeah, they did unplug the battery and also the air intake. The problem seem to be intermittent, i.e. yesterday right after posting about the problem going away, I went back and check again and it is back. It comes and goes kinda like something is loose or so. because it only does it when you rev try to move but not at idle. I replace a bunch of hoses I thought were a little on the loose side but to no avail.
Still trying to find what it is today, will make appointment with toyota tomorrow if I can't figure it out.
Thanks