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system too lean

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badwoj
New User

Nov 11, 2009, 6:40 PM

Post #1 of 4 (3508 views)
system too lean Sign In
ODB II reader gives me PO171 &174 system too lean bank 1 bank 2. What can make both go at same time?

2001
ford
ranger
4.0L
84,000
4wd


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Nov 11, 2009, 7:12 PM

Post #2 of 4 (3499 views)
Re: system too lean Sign In
Although there are numerous possibilities for these codes, I seem them quite often on Fords and it's almost always due to a severe vacuum leak. With the engine idling, listen for a hissing noise and try to follow it to it's source. Pay close attention to the rubber connectors for the PCV line and any other large feeds. They are notorious for sucking a hole right through the connector that only is visible with the engine running.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



badwoj
New User

Nov 12, 2009, 6:28 PM

Post #3 of 4 (3477 views)
Re: system too lean Sign In
You were correct, the rubber 90 that goes to what I think is the PCV was sucked and cracked. Could the Pcv be plugged and causing this? I went to the dealership and the parts guy said that what I explained has a re-heat on it 2 small and 1 large hose. Never seen a PCV like this before. What do you think.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Nov 12, 2009, 6:44 PM

Post #4 of 4 (3473 views)
Re: system too lean Sign In
It's just decomposed rubber. Replace it and you'll be fine



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.






 
 
 






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