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1999 Ford Expedition XLT 4.6L Poor Idle Quality, MIL Lamp on
Posted to Ford Driveability on 2/19/2009 5 Replies

Hello all. This vehicle came in with a cel on and misfire code. Foiund failed plug wires. Replaced plugs wires fuel and air filter. Test drove runs fine. Returned vehicle to customer. 500 miles later vehicle comes in with po171 po 174 code. Check maf sensor wa...

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  Related Documents & Media  1999 Ford Expedition XLT

 
Message Closed w/FIX

car Vehicle Data

1999 Ford Expedition XLT

VIN 1FMRU1868X
Engine4.6 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, MIL Lamp On

Trouble Codes

P0171Fuel System Too Lean (Bank 1)
P0174Fuel System Too Lean (Bank 2)
Message Closed w/FIX

car Vehicle Data

1999 Ford Expedition XLT

VIN 1FMRU1868X
Engine4.6 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, MIL Lamp On

Trouble Codes

P0171Fuel System Too Lean (Bank 1)
P0174Fuel System Too Lean (Bank 2)