× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
1999 Chevrolet Express 2500 5.7L Hesitation
Posted to GM Driveability on 7/13/2007 12 Replies

Thanks to all fellow techs who review this and try to help me out. I have terrible luck with trying to diagnose these CSFI engines. Customer brought to our shop, it was a recent car lot purchase, with bad hesitation, back firing under slight load, checked fuel...

12 Replies Received (View Replies)

  Related Documents & Media  1999 Chevrolet Express 2500

 
Message Closed w/Summary

car Vehicle Data

1999 Chevrolet Express 2500

VIN 1GAGG25R8X
Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / CSFI
EmissionsOBD-II Compliant
SymptomsHesitation
OccursUnder Load

Trouble Codes

P0101Mass Airflow Sensor Range/Performance
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
P0172Fuel System Too Rich (Bank 1)
P0175Fuel System Too Lean (Bank 2)
Message Closed w/Summary

car Vehicle Data

1999 Chevrolet Express 2500

VIN 1GAGG25R8X
Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / CSFI
EmissionsOBD-II Compliant
SymptomsHesitation
OccursUnder Load

Trouble Codes

P0101Mass Airflow Sensor Range/Performance
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
P0172Fuel System Too Rich (Bank 1)
P0175Fuel System Too Lean (Bank 2)