i have a 99 ford windstar with about 67,000 miles, and the check engine light is on all the time. I had it diagnosed and got a P0171, P174 [ system too lean [Bank 1 &2]. Erased the codes and they returned in less than one day of driving. Can anyone help me on this and trouble shoot. Any help will be much appreciated. Thank you.
99 windstar [system too lean]
Feb 27, 2007
5 Replies
I would look and listen for a vacuum leak. It could be as simple as a hose that came off or split. Hope this is helpful!
PoD
here's the best site out there for it.
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Vacuum leak. Get a MityVac and use it.
If his intake is leaking, and it probably is, how is a mityvac going to find it?
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