too late i alredy played but i had the co meter on it and it didnt move from .6 all it did do stop the engine check light from working and also should the exhaust warning temp light come on with the ignition or just when u tur the engine over.
next problem i have is at about 4500rpm the car slows down slightly and sometimes backfires also i would like to know how to turn the idlespeed down as it ticks over at about 1100rpm.
all the car has done to it is a kakimoto exhaust, hks filter,de cat and a forge dump valve once again thanks in advance