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1991 Chevrolet Corsica 3.1L Excessive Emissions
Posted to GM Driveability on 7/4/2000

this one came in for im/240 failure {co & hc}. seems to run rich at idle only{block learn 100 @ idle,120 @ 2000rpm}. vacuum is 17.5 @ idle {1.4-1.6v map} and 20 @ 2000rpm {0.9-1.0v map}. all sensors scope out good. o2s is switching better at cruise than at idl...

 
Message Closed w/FIX

car Vehicle Data

1991 Chevrolet Corsica

VIN [No VIN Available]
Engine3.1 L / 6 cyl
SymptomsExcessive Emissions
OccursIdle
Misc.Dis
Message Closed w/FIX

car Vehicle Data

1991 Chevrolet Corsica

VIN [No VIN Available]
Engine3.1 L / 6 cyl
SymptomsExcessive Emissions
OccursIdle
Misc.Dis