99 Explorer PO171 codes
#1
99 Explorer PO171 codes
I currently own 10 Fords from 1965 to 2004. By far the 99 Explorer (127K) has given Ford a black eye. My check engine light is on again and the OBD II code is PO171 (too lean). I replaced O2 sensors on one side and the light appeared again a couple of weeks later. I cleaned the MAF, PVC valve and looked for vac leaks. Fuel filter was changed 12K ago. The engine is hard to start in the morning. Once started, it revs up and down for a few seconds and then idles. I have read online that it may be bad intake o-rings. Any similar experiences? Any help would be appreciated.
#2
#3
Thread
Thread Starter
Forum
Replies
Last Post
toddrochester
Explorer, Sport Trac, Mountaineer & Aviator
3
10-30-2011 07:45 AM
jaystersj
Explorer, Sport Trac, Mountaineer & Aviator
3
01-16-2009 11:03 AM
jmwhelchel
Explorer, Sport Trac, Mountaineer & Aviator
9
09-19-2008 04:01 PM