MustangWorks.com : Ford Forums - View Single Post

FoxBuilder · 02-27-2002, 01:41 PM

I beleave below 3,000rpm the computer will add or subtract fuel to try and obtain a perfect 14.7:1 air/fuel ratio. If your car is running lean and the ECU is not trying to add fuel (especially in closed loop). I would say air is entering somewhere downstream from the MAF sensor, or a sensor somewhere is bad (MAP/BP, IAT, CT, O2). How does the car Idle? Try taking the fuel pressure up to 38-40psi.

02-27-2002, 01:41 PM	#2
FoxBuilder Registered Member Join Date: Sep 1999 Location: Columbus, Ohio Posts: 233	I beleave below 3,000rpm the computer will add or subtract fuel to try and obtain a perfect 14.7:1 air/fuel ratio. If your car is running lean and the ECU is not trying to add fuel (especially in closed loop). I would say air is entering somewhere downstream from the MAF sensor, or a sensor somewhere is bad (MAP/BP, IAT, CT, O2). How does the car Idle? Try taking the fuel pressure up to 38-40psi. __________________ 2001 Mustang GT 4.6L w/AODE: K&N FIPK kit, 87mm MAF, 19lbr., H-Pipe, Mufflers, 2.73, stock rubber, (4) custom programs by me using Autologic chips. Best E.T. 13.890@100.0mph 1984 Mustang LX 5.0L w/T-5: BOSS, TFSTW, Vic. Jr., BG, trick stick.