Sluggish Celica, Check engine light on too Options

[Tru_Pol]

Ok, I bought a 95 celica ST with 70,000 miles on it for 500.00 bucks sometime ago. I have installed a custom cold air intake, racing plugs, wires, and a new cap. I have removed the 1st cat and hollowed it out (so if I get pulled over I can show its still there) and have a B5 bomber muffler. I have also just installed my bullet fenders (painted too). I have alot more planned but have run low on cash.

Now my problem.......My check engine light has come on and the car seems to run sluggish. It seems to take a long time to get the car to move. Does anyone have any ideas what the problem might be? Im thinking it might be a clogged fuel injector, or fuel filter. Any ideas would be great!

[Tru_Pol]

This ST I bought was beaten the living crap out of it. I can tell it has been in 2 or 3 accedents (hence the fact I needed new fenders and a new bumper). The interier is all stained and it needs new seats, and all the wiring is messed up. So judging from that I dont think this car was taken car of at all. In fact I bet oil changes were done every 10,000 miles.

Also does anyone have any ideas what I could do to give the car more pep? I know it has the 4cyl 1.8l engine and a swap will be done in a year or so, but for now I would like to move alittle faster.