Stock displacement LS1
Stock Heads
228/232 .588/.595" 113lsa Cam
Car runs great except for one problem I can't seem to track down. When slowing to stop, as the car returns to idle it leans out very badly (18+ afr). It returns to stoich. after about 5 seconds of sitting at idle. The faster I stop the worse it leans out. I've tried turning DFCO off, but it had zero effect. My fuel pressure is a consistent 58-60psi.
Any ideas?
track4sep.hpt