Engine
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Junior Member
Joined: Jul 2003
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From: TEXAS
Engine
I have a 98' F150with a 4.6 and the engine light is on,I had the code's pulled and the computer is telling me that it is runing to lean on bank's one and two. If there is anybody that has had this problem, I would like to know what you did to correct it. Thanks for your help
Last edited by D.E.H; Jul 22, 2003 at 11:09 PM.
Member
Joined: Apr 2003
Posts: 42
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From: Vermont
From a friend of mine that works at a Ford dealer, the two most common problems that would cause a system too lean code are vacuum leak or dirty MAF sensor.
From this board, most people seem to find a problem with the vacuum connection on the back side of the throttle body adapter. This connects to your PCV valve. That would be the first thing I would check.
Or you can do a search on this site using P0171 or P0174 and it should bring up quite a few threads about this same topic.
Good luck
Rob
From this board, most people seem to find a problem with the vacuum connection on the back side of the throttle body adapter. This connects to your PCV valve. That would be the first thing I would check.
Or you can do a search on this site using P0171 or P0174 and it should bring up quite a few threads about this same topic.
Good luck
Rob
Junior Member
Joined: Nov 2002
Posts: 1
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Lean banks
I agree that you should check for vacuum leaks and the MAF sensor, however I found the on my 98 4.2 after 8 months of searching and replacing sensor after sensor it was the feul pump itself that was defective. I have not had a problem since then. I would check for vacuum leaks first, because to fuel pump is around $100
