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1998 Buick Century Custom 3.1L Poor Fuel Economy
Posted to GM Driveability on 8/4/2010 14 Replies

car gets about 16 mpg. vehickle runs like it has a bad cat under heavy acceleration. stft at idle is -10 TO -20 ltft is the same and gets worse when driven. map value at idle is 39 kpa and at cruise is 46kpa. map volts is 1.21 at idle and changes normally unde...

14 Replies Received (View Replies)

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Message Closed w/Summary

car Vehicle Data

1998 Buick Century Custom

VIN 2G4WS52M4W
Engine3.1 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / sefi
EmissionsOBD-II Compliant
SymptomsPoor Fuel Economy
OccursAlways
Message Closed w/Summary

car Vehicle Data

1998 Buick Century Custom

VIN 2G4WS52M4W
Engine3.1 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / sefi
EmissionsOBD-II Compliant
SymptomsPoor Fuel Economy
OccursAlways