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1997 Mercury Mystique GS 2.0L Poor Idle Quality, Hesitation, Surge, MIL Lamp on
Posted to Ford Driveability on 12/22/2003 3 Replies

I have a lean condition code and the idle is at 1200 rpm. After initial start up it seams like it tries to idle normally but it stumbles. Immediately afterwards it goes right up. I looked for vacumm leaks and found none. IAC motor, maf, o2 sensors, and tps are...

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car Vehicle Data

1997 Mercury Mystique GS

VIN 1MELM6531V
Engine2.0 L / 4 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / sefi
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Hesitation, Surge, MIL Lamp On
OccursAlways

Trouble Codes

P0171Fuel System Too Lean (Bank 1)
Message Closed

car Vehicle Data

1997 Mercury Mystique GS

VIN 1MELM6531V
Engine2.0 L / 4 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / sefi
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Hesitation, Surge, MIL Lamp On
OccursAlways

Trouble Codes

P0171Fuel System Too Lean (Bank 1)