TravisMcGill2000

iTrader: (2)

I have a 94 trans am a4. it has LT's,4in y-pipe,160*,foil,cai,flowmaster,under pully's. Here is the problem sometimes the car runs real baddly, it skips,shakes, starts shaking,and smoking . then if u stop and then take off the car feels like it doesnt have any power. then all of a sudden it takes off. like u hit nitrous or something. i have changed plugs,O2 sensors,and have checked the wires. does anybody have any answers please i have no ideal. by the way there r not check engine light on