P0087 major problems

[lucas6.6]

Currently going down the highway, rail pressure is low enough that I can't maintain 55mph. At 50 mph rail pressure is 3kpsi. Bad fuel filter? Gelled fuel? It's -12 right now

 

[DIESELMAFIAPER.LB7]

Sounds gelled

 

[lucas6.6]

Im hoping that's the case. Stopped halfway home and poured a good amount of the power service diesel 911 additive in the tank to see if that would help at all. Any way to combat this? It's gonna be this cold for a few days and I'm planning on taking the truck up north this weekend. Also, will replacing fuel filter help?

 

[LbzDMax07]

You're gonna have to replace the filter. It's probably waxed inside and I would just run a little extra additive. You should be good to go then.

 

[DIESELMAFIAPER.LB7]

Do you have anywhere to buy number 1 diesel if so fill it with number 1 and don't worry at all

 

[lucas6.6]

Changed the filter today, fuel that came out was a little thicker than normal. With the new filter it runs fine, I'm still seeing a loss of rail pressure at higher rpms in the higher gears, but I'd say that's because I don't have a lift pump

 

[superswamper003]

How big of a tune are you running?

 

[lucas6.6]

On the 110 tune there's roughly a 4k difference in psi at 3/4 to WOT

 

[superswamper003]

Im no real expert on the matter, but i dont think it should be dropping psi at 3/4 of throttle on a 110 tune