Thread: 2004 Lincoln Towncar p0171 & p0174 codes
View Single Post
Old 09-10-2010, 03:03 PM   #2
danielsatur
AF Enthusiast
 
Join Date: Mar 2008
Location: garner, North Carolina
Posts: 3,579
Thanks: 86
Thanked 100 Times in 100 Posts
Re: 2004 Lincoln Towncar p0171 & p0174 codes
Sounds like unmetered air leaks, causing the engine to run lean.
Do a Google ''Auto vacuum leak smoke test''
Plastic, rubber, and gaskets will go bad with age + mileage.
Suspect the EGR, DPFE, or PCV system is sucking in Air.
danielsatur is offline   Reply With Quote