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1991 Buick LeSabre 3.8L Poor Idle Quality, Surge, Misfire
Posted to GM Driveability on 1/20/2003 9 Replies

Hi All

Vehicle will run smooth in OPEN LOOP, but as soon as CLOSED LOOP is achieved, it will begin to run extreamly rough and surge but not quite stall. Using a Vantage the KVs fluctuate wildly, loosing the signal completely at times. Driving it will operate ...

9 Replies Received (View Replies)

  Related Documents & Media  1991 Buick LeSabre

 
Message Closed w/FIX

car Vehicle Data

1991 Buick LeSabre

VIN 1G4HR51C8M
Engine3.8 L / 6 cyl / GAS
Trans4-speed Automatic
DeliveryFI
SymptomsPoor Idle Quality, Surge, Misfire
OccursIn Closed Loop Only
Message Closed w/FIX

car Vehicle Data

1991 Buick LeSabre

VIN 1G4HR51C8M
Engine3.8 L / 6 cyl / GAS
Trans4-speed Automatic
DeliveryFI
SymptomsPoor Idle Quality, Surge, Misfire
OccursIn Closed Loop Only