Hey guys, just bought an 08 F-250 with 6.4. 65k. The truck already has a EGR, DPF delete, full exhaust and Sct tuner installed. When i bought the truck the green wrench light was on and I assumed it was some type of service light, however now researching it I realize its not. No check engine lights but I talked to my buddy thats a Ford tech and he said its probally trying to regenerate the filter, but since its deleted its throwing the light. No drivablility issues, runs crazy good. Wondering if its something I should has checked out or its normal with mods? I connected my scan tool and it showed no codes (I assume the light is controlled by a seprate control module beacuse the check engine light is not on) Any Suggestions? Also the tuner with it is a SCT 8900 but it only has the box that plugs into the obd port, no display. It will blow a little smoke with it plugged in but none when its unplugged. Im assuming also its a mild tune but I am unable to change/read any data without the display. Any suggestions would be appriciated. Love this truck, just wanna make sure I take care of any problems...