ok my CEL is on...and when i raised the car up i noticed that there wasnt an O2 sensor on the header....theres not even a hole for it on the header...also the car doesnt have a CAT...its straight pipe but i dont even see the wires for the 02....is this wats causing my CEL to light up?? also my car got beat ny a d15b nonvtec coupe....which im sure i shouldve beaten, i kno it depends on the driver but hes my homeboy and we both have about the same driving skills....my motor revs up to 6000 rpm before it makes me shift gears, i thought the ls motor is suppose to be able to go higher than that.....any advice would help...if i get time today i will do that paper clip thingy to the ecu and see wat codes come out......thanks for any help