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1987 Chevrolet V30 Silverado 5.7L Excessive Emissions, Poor Idle Quality, Hesitation, Stall, MIL Lamp on
Posted to GM Driveability on 6/20/2008 25 Replies

The truck came in with a code 33 for MAP sensor and and oxygen sensor code. The fuel state stays rich even after replacing both affected components. Oxygen sensor volts are .69 wirh 0 cross counts. IAC is 47 and coolant temp switch is working. Can not figure o...

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  Related Documents & Media  1987 Chevrolet V30 Silverado

 
Message Closed w/FIX

car Vehicle Data

1987 Chevrolet V30 Silverado

VIN 1GBHV34K7H
Engine5.7 L / 8 cyl / GAS
Trans3-speed Automatic
DeliveryFI / tbi
SymptomsExcessive Emissions, Poor Idle Quality, Hesitation, Stall, MIL Lamp On
OccursAlways

Trouble Codes

33MAP sensor
Message Closed w/FIX

car Vehicle Data

1987 Chevrolet V30 Silverado

VIN 1GBHV34K7H
Engine5.7 L / 8 cyl / GAS
Trans3-speed Automatic
DeliveryFI / tbi
SymptomsExcessive Emissions, Poor Idle Quality, Hesitation, Stall, MIL Lamp On
OccursAlways

Trouble Codes

33MAP sensor