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  • · 101towing Inc.
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    07 IHC 4400 with a DT466E.scanned with an inactive code variable turbo 1 current below norm sid:27 fmi:5. lacks power off idle, I have a fuel pressure problem,checking at the schrader valve reads 20 psi,compared to other truck at idle its 55/60. Not sure suspect the lift pump?? Whats the lift pumps job? I found 2/3/4 small rocks inside the fuel filter housing about the size of a bb or very close to it, so my thoughts are if it passed through the lift pump it may be damaged. I suspect that having to hold down the pedal to the floor and going no ware until it hits upper rpm's might be giving a false code for the turbo actuator,Turbo arm to the actuator moves nice so it should not be an issue.So help, what make the initial pressure to 60 at the schrader valve ?? Might mention the small screen filter on the bottom of the filter housing is dry? should in have fuel in it?? I can even run the truck with it taken off and wide open to the air. Is this correct? my thoughts something is plugged.
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