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2001 Buick Century Custom 3.1L Poor Idle Quality, Stall, MIL Lamp on
Posted to GM Driveability on 9/2/2009 14 Replies

This one has me baffled! The fuel trims look normal for a few minutes after starting, but then start to climb both at idle and high rpm until they pin. The engine runs fine until the trims go up and then starts running poorly until it stalls. It goes way rich ...

14 Replies Received (View Replies)

  Related Documents & Media  2001 Buick Century Custom

 
Message Closed w/FIX

car Vehicle Data

2001 Buick Century Custom

VIN 2G4WS52J11
Engine3.1 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Stall, MIL Lamp On
OccursHot

Trouble Codes

P0101Mass Airflow Sensor Range/Performance
P0171Fuel System Too Lean (Bank 1)
Message Closed w/FIX

car Vehicle Data

2001 Buick Century Custom

VIN 2G4WS52J11
Engine3.1 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Stall, MIL Lamp On
OccursHot

Trouble Codes

P0101Mass Airflow Sensor Range/Performance
P0171Fuel System Too Lean (Bank 1)