× 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
1998 Lincoln Navigator 5.4L Poor Idle Quality, Poor Fuel Economy, MIL Lamp on
Posted to Ford Driveability on 6/4/2004 16 Replies

Hi, I have what seems to be a case of unmetered air getting into the engine. The codes p0171 and p0174 set quickly. The engine has been checked for vacuum leaks using a smoke machine. I am satisfied that there are no hose leaks, but am not confident that the s...

16 Replies Received (View Replies)

  Related Documents & Media  1998 Lincoln Navigator

 
Message Closed w/FIX

car Vehicle Data

1998 Lincoln Navigator

VIN 5LMPU28LXW
Engine5.4 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Poor Fuel Economy, MIL Lamp On
OccursHot

Trouble Codes

171Bank 1 Lean
174Bank 2 Lean
Message Closed w/FIX

car Vehicle Data

1998 Lincoln Navigator

VIN 5LMPU28LXW
Engine5.4 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Poor Fuel Economy, MIL Lamp On
OccursHot

Trouble Codes

171Bank 1 Lean
174Bank 2 Lean