Quote Originally Posted by curtis265 View Post
Some good info here guys

IT's quite normal to run rich. Stock tunes are generally a bit rich and the ECU adds more fuel to deal with the extra air flow (i think)

my prelude runs sickeningly rich and smells of fuel when u vtak it.

doesn't smell fuelly at idle tho (unless cold)
I'd say we have a winner...but if he's driving it normally, and his mate behind him can smell the car without stepping on vtec...that might be another issue that oopoc mentioned.