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1991 Chevrolet S10 Blazer Tahoe 4.3L Excessive Emissions, Poor Fuel Economy, MIL Lamp on
Posted to GM Driveability on 6/14/2005 6 Replies

I cannot get this truck to go into closed loop fuel control. The only scan data that doesn't make sense is O2 voltage. Snappy scanner shows .453 mv, never changes, regardless of engine temp or engine rpm. By backprobing near the computer(bed-of-nails clip on g...

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  Related Documents & Media  1991 Chevrolet S10 Blazer Tahoe

 
Message Closed w/Summary

car Vehicle Data

1991 Chevrolet S10 Blazer Tahoe

VIN 1GNDT13Z0M
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic
DeliveryFI / TBI
EmissionsUS Fed emissions
SymptomsExcessive Emissions, Poor Fuel Economy, MIL Lamp On
OccursAlways
Message Closed w/Summary

car Vehicle Data

1991 Chevrolet S10 Blazer Tahoe

VIN 1GNDT13Z0M
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic
DeliveryFI / TBI
EmissionsUS Fed emissions
SymptomsExcessive Emissions, Poor Fuel Economy, MIL Lamp On
OccursAlways