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1999 Chevrolet Express 2500 5.7L Excessive Emissions, Hesitation, Cuts out, Poor Fuel Economy
Posted to GM Driveability on 3/25/2008 9 Replies

at idle this van runs great. engine will rev just fine on light excell, but med. to heavy excell it will not rev over [...] rpm. backfires through intake. falls flat on its face. fuel pressure in [...] and 55psi when acting up. cam retard at 0- +1 degree. when...

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  Related Documents & Media  1999 Chevrolet Express 2500

 
Message Closed w/FIX

car Vehicle Data

1999 Chevrolet Express 2500

VIN 1GCGG25R8X
Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsExcessive Emissions, Hesitation, Cuts Out, Poor Fuel Economy
OccursAlways, on Accel

Trouble Codes

P0131Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage
P0137Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit Low Voltage
P0151Heated Oxygen Sensor (Bank 2 Sensor 1) Circuit Low Voltage
P0157Heated Oxygen Sensor (Bank 2 Sensor 2) Circuit Low Voltage
Message Closed w/FIX

car Vehicle Data

1999 Chevrolet Express 2500

VIN 1GCGG25R8X
Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsExcessive Emissions, Hesitation, Cuts Out, Poor Fuel Economy
OccursAlways, on Accel

Trouble Codes

P0131Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage
P0137Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit Low Voltage
P0151Heated Oxygen Sensor (Bank 2 Sensor 1) Circuit Low Voltage
P0157Heated Oxygen Sensor (Bank 2 Sensor 2) Circuit Low Voltage