Originally Posted by B.R.D.
I would check all your exhaust connections, especially at the head. I had a similar problem which ended up being an exhaust leak at the head allowing fresh air to be sucked in when decellerating creating a lean condition.
What kind of exhaust do you have? Stock? Muzzy? I have the Muzzy and think I may have an exhause leak at the head as well. I'm wondering where I can get a new set of those flange gaskets...
2008 LE, Dynatek CDI, AFE intake, jetted carbs with modified slides, Muzzy race exhaust (black teflon coated cans), EPI belt and clutch springs, HID conversion headlights