HI guys
ok my truck the 01 HO is doing something wierd!
as i drive down the hwy my fuel pressure is a 11 psi as I drive it will all of a sudden drop to 4psi if i give it WOT it will go back ut to 11 psi and stay there for a long time then drop to 4 if I give it more fuel the pressure will climb the more I step on it then when I let up it will go to 11 and so on and so forth.
I pulled the codes and get 0573 ? my FSM doesnt show what that is. who can give me the answer?
the lift pump is 8 months old new fuel filter.I will order a new fass for it now too. who has the best price on the kit with out filters(95)
Thanks
R

 

P0573 Cruise Control/Brake Switch A Circuit High

I was having a simular problem when fp would drop 4-5 psi then jump back up when I got on it, but it seems to have worked itself out now. Maybe bad fuel?

 

its wierd how its doing this. is there some kind of valve built in to the pumps to maintain pressure? I dont like it what ever it is

and where did you find the code description at ? my FSM doesnt show it