P0171 and P0174

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.

"willie" > wrote in message
oups.com...
>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.


change out the fuel filter

read the plugs, whiteish, too lean, there are some good photos on the
internet


>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.

It would have to speed up with motor speed or wheel speed.

Steering wheel says it is one of the front tires

> 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.
>

On Apr 9, 8:57 pm, "Loman Napetos" > wrote:
> "willie" > wrote in message
>
> oups.com...
>
> >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.
>
> change out the fuel filter
>
> read the plugs, whiteish, too lean, there are some good photos on the
> internet
>
> >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.
>
> It would have to speed up with motor speed or wheel speed.
>
> Steering wheel says it is one of the front tires
>
> > 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.


Thank you very much for the help!!

http://www.ford-trucks.com/forums/53...al-thread.html

98 Mazda B4000 and I got the same codes. Replacing the upper intake gaskets
fixed it.



"willie" > wrote in message
oups.com...
>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.
>