DTC P0251

[MrMarty51]

Had the wifey come out and hold the throttle at about 2200 RPMs.
Right at the stage where it starts cutting out and blowing a lot of smoke.

Intake manifold not yet on. Turbo bolted up so the main of the exhaust goes out the pipe. Pressure side of turbo to atmosphere.
There is no air intrusion whatsoever in the clear hose.
Post FFM fuel pressure is right at 11 PSI. At the Air Dog fuel pressure is holding a steady near 30 PSI. IDK why when I adjusted the FP upwards that at the AD the pressure went from about 12 PSI to next to 30 in order to get the post FFM pressure to 15 PSi and now for some reason the pressure has dropped to about 11.
Guess I’ll change the FFM filter and see whats going on.
It was a new FFM filter at the last oil change 450 miles ago.
Guess I’ll change all three filters not knowing where in the system the sending unit is placed for the AD FP.

 

[MrMarty51]

AD sending unit, marked back at the switch.



Post FFM sending unity. Marked FRONT near the switch.

 

[jrsavoie]

Have you run fuel.out the T drain?

I'd run about 1/2 gallon or more out the T drain into a gallon pickle far. Let it sit for a while and see how it looks.

Do your stations have mostly Biodiesel?

 

[MrMarty51]

Have you run fuel.out the T drain?

I'd run about 1/2 gallon or more out the T drain into a gallon pickle far. Let it sit for a while and see how it looks.

Do your stations have mostly Biodiesel?

I will give that a try, draining out the T valve.
I have seen no signage on the pumps that I use that advertises that any portion of the fuel is bio diesel.