I have an '04 f150 5.4l with 65k miles that jerks when going uphill. Transmission seems to shift fine but it has seemed to lose a considerable amount of power recently. Possibly a fuel system problem? Any help would be appreciated.
Ignition timing would be #1 on the list. Also check your plug wires, or change them. Check your air filter, and change the fuel filter. It could also be your egr system, faulty ignition coil, or a vacuum leak at the intake manifold.
SOURCE: 04 f150 jerking going uphill
I have an 04 f150 5.4 and when i start up a hill or get around 2000 rpms it starts missin and jumpin like crazy. Ran the codes on the computer it said mis fire on cylinder 5
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Only does it going uphill. It doesn't have to be a steep grade of hill either. Once you accelerate while its doing it, it stops jerking and drives fine. Also, no warning light of any kind is on.
extremely odd, I was hoping you would say hard acceleration too....lol
then i could have pointed at the coils.
then again it could be possible that one or more of the coils is weak.
you'll have to take to dealer for a check on that.
have you checked the air filter?
fuel filter?
does it do it on hard acceleration also or just uphill?
is there an engine light or mil light on?
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