I have a 2002 Ford Ranger - 4.0 L with 67,000 miles.  Keep getting the
codes P0170 and P0174 fuel banks too lean.  However, engine does not
run rough at all, and no hard starts.  Thought that it may be clogged
fuel injectors, but that was not the problem.  Now thinking that it
may be sensors.  Looking for some suggestions, or a way of determining
the problem.  Also, started feeling a steady thump from the front end
while driving.  Can feel it slightly in the steering wheel.  It does
not seem to speed up with acceleration.  Checked the u-joints, and
they seem to be good, a little play but not much.  The tires have less
than 8,000 miles, and I am going to have them rotated, balanced, and
aligned.  but if that does not help, any suggestions on this problem
as well.  I could use any help on these issues and definitely
appreciate your time with your responses.
Thanks.