1998 Ford Expedition Fuel/Air Metering problem

1998 FORD EXPEDITION
147,000 MILES • V8 • 4WD • AUTOMATIC
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ROOSTER89
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I need help with a 98 Ford Expedition 4.6liter 4X4. Recently the check engine light came on and after a quick OBD II scan I came up with three codes. During the troubleshooting I replaced the Bank 2 downstream oxygen sensor, throttle position sensor and the MASS Air Sensor. This cleared all three of the codes. Well sixty miles later the check engine light is on again this time with an upstream Bank 2 oxygen sensor and the OBD II Code of: P1151 Manufacturer Control Fuel Air metering. Any tech savy people out there want to try and help me figure this out? The truck has about 147k miles on it. thanks!
Apr 22, 2008 at 5:43 PM
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EXPEDITIONDOCTOR98
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just yesterday i corrected my air fuel problems that i had for quite some time. on several random peices of advice i concluded my problem originated in the egr. this issue was the two egr ports on the rear of the throtle body. they were COMPLETELY obstructed with carbon deposits and this caused the computer to throw a chain of codes including the ones you cited. i recomend doing this maintainence to ANY ford truck or any brand vehicle with high mileage that uses recurculated exhaust gas. Carbon buildup is one of the greates performanc/efficiency and gas mileage culprits on modern vehicles.
May 2, 2008 at 7:25 PM