i have my car tuned by triangle speed shop, which they use SCT....when i had it tuned they cleared the light for the O.R. x pipe, but i guess something went wrong, because now my car shows NO CEL's when i scan it at work............the other day number 6 cylinder was DEAD (fouled a plug).......i unplugged injectors until i determined the dead cylinder, and it STILL never threw a light. (which it should). i got to work and hooked the IDS (scan tool) up to the car, and it had absolutely NO codes in it at all. im worried about this because i would like for my car to still let me know if anything is wrong. any help guys?