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International Automotive Technicians Network
1997 Mercury Mystique GS 2.0L Poor Idle Quality, Hesitation, Surge, MIL Lamp on
Posted to Ford Driveability on 6/21/2005 9 Replies

Hi Ford Techs ; This vehicle came in originally with mil light on & p1131 code [ up o2 lean ]- road tested 20 miles ,could not duplicate . all sensor readings ok at this time . I gave the car car back to the customer .

1 week later , car returned on the hook...

9 Replies Received (View Replies)

  Related Documents & Media  1997 Mercury Mystique GS

 
Message Closed w/FIX

car Vehicle Data

1997 Mercury Mystique GS

VIN 1MELM6538V
Engine2.0 L / 4 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Hesitation, Surge, MIL Lamp On
OccursIntermittently

Trouble Codes

P1131Electric Vacuum Pump System Related PGM-FI Sensor Signal Malfunction
Message Closed w/FIX

car Vehicle Data

1997 Mercury Mystique GS

VIN 1MELM6538V
Engine2.0 L / 4 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Hesitation, Surge, MIL Lamp On
OccursIntermittently

Trouble Codes

P1131Electric Vacuum Pump System Related PGM-FI Sensor Signal Malfunction