I've been dealing with this problem too.. Took it to a local tuner that uses rom raider and he was going to see if he could tune it out but no luck .. I cleaned maf and changed plugs nothing, still does it! Mine does it when my car is totally warmed up only! I noticed if I drive for less than 20 min it doesn't happen. Over 20 min it happens right when you push on the gas pedal at times. No cel ever for me.