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2001 Ford Explorer Sport Trac 4.0L Poor Idle Quality, Misfire, MIL Lamp on
Posted to Ford Driveability on 3/26/2015 27 Replies

I am stumped on this one. This vehicle exhibits a very rough high idle at around 1500rpm. It goes away with light acceleration. Mil lamp is on but only for p0171(bank 1 lean). Occasionally will also have misfire code but very sporatic and never the same cylind...

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  Related Documents & Media  2001 Ford Explorer Sport Trac

 
Message Closed w/FIX

car Vehicle Data

2001 Ford Explorer Sport Trac

VIN 1FMZU77E51
Engine4.0 L / 6 cyl / GAS
Trans5-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire, MIL Lamp On
OccursAlways, Idle, 1500Rpm

Trouble Codes

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

car Vehicle Data

2001 Ford Explorer Sport Trac

VIN 1FMZU77E51
Engine4.0 L / 6 cyl / GAS
Trans5-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire, MIL Lamp On
OccursAlways, Idle, 1500Rpm

Trouble Codes

P0171Fuel System Too Lean (Bank 1)