× 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 GMC Savana 3500 5.7L Poor Idle Quality, Surge, MIL Lamp on, Lean
Posted to GM Driveability on 11/17/2011 9 Replies

This truck is adding fuel from idle up into cruise. The lean codes are setting on decel at about 33 mph. I have check fuel pressure under full throttle and it is at 57 psi. The o2's are switching, they are not showing lean. The actual compliant is that it surg...

9 Replies Received (View Replies)

  Related Documents & Media  1999 GMC Savana 3500

 
Message Closed w/Summary

car Vehicle Data

1999 GMC Savana 3500

VIN 1GDJG31R3X
Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Surge, MIL Lamp on, Lean
OccursOn Decel, Idle
Misc.Box Van

Trouble Codes

P0171Fuel System Too Lean (Bank 1)
P0174Fuel System Too Lean (Bank 2)
Message Closed w/Summary

car Vehicle Data

1999 GMC Savana 3500

VIN 1GDJG31R3X
Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Surge, MIL Lamp on, Lean
OccursOn Decel, Idle
Misc.Box Van

Trouble Codes

P0171Fuel System Too Lean (Bank 1)
P0174Fuel System Too Lean (Bank 2)