I just got done changing my fuel filter after I thought it might be plugged from running B20. I thought this due to the fact that my FP has dropped from 9-10psi at idle to 6psi. And I can drop my FP running hard all the way to 0psi.

To the untrained eye such as I have when I pulled the filter which by the way is super easy....the filter looked good.




So I put in and fire her up expecting to see 9-10psi......aaaannnnndddd nope.
Still seeing 6psi at idle. I have not driven it yet to see if it picks up at all, will tomorrow when I go to work.

Anybody have any ideas as to what's going on??? My truck only has 4100mi on her. I hope my LP isint going out YET!!!!???

 

I was able to pull my stock pump pressure to zero with just the XZT box a long time ago. Your pump may be going bad. Just change it and be done. I recommend a Walbro GSL392.