Hi there, have you tested; cts sesnor, maf sensor, carbon cannistor stuck open, EGR Stuck open, would expect weak mix with this though. Something is telling veh to increase fuel in closed loop, have you tried disconnecting injectors one at a time to see if its uniform or individual injector, also check for lambda switching with inj disconnected, it should go weak causing switch. What happens if you do fast idle test? HTH Jim