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1989 Pontiac GRAND AM 2.3L Hesitation, Surge, Poor Fuel Economy
Posted to GM Driveability on 9/2/1999

the problem is the system is running lean all the time. When idiling with scanner on,O2 mv stay at around 877 ( system goes into CLSD loop ) Integrator is at 28. Then o2 mv start to drop to approx 378. Then integrator jumps up to 128,then the car runs fine...

 
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car Vehicle Data

1989 Pontiac GRAND AM

VIN 1G3NF11A6L
Engine2.3 L / 4 cyl
EmissionsOBD1
SymptomsHesitation, Surge, Poor Fuel Economy
OccursUnder Load, Idle
Misc.2Dr
Message Closed

car Vehicle Data

1989 Pontiac GRAND AM

VIN 1G3NF11A6L
Engine2.3 L / 4 cyl
EmissionsOBD1
SymptomsHesitation, Surge, Poor Fuel Economy
OccursUnder Load, Idle
Misc.2Dr