Code P1280 - ICP?

[SUVeggiecar]

I've got a 2000 Excursion 7.3L running a DIY conversion (deadheaded). Before I converted the rig, I was getting an intermittent CEL code P0673 for glow plug circuit fault in cylinder 3. It came on for a few days, went off for a few months, came on for a few days went off for a few months. Then I completed my conversion and have run roughly 100 gal through my system. I'm also having some heat-related issues, having trouble getting my temps up:

Low WVO Temps

So I've been tweaking my system here and there and in the course of testing things out have probably run some cooler-than-desired oil through the engine (let's say 130 degrees).

My CEL just came back on and threw me two codes this time, the P0673, and also the P1280, which I understand is an Injector Control Pressure sensor. Here's the $10,000 question: could my conversion be causing this CEL, and am I ruining my injectors?

Ever since I've converted my rig, I've been driving around paranoid that I'm ruining my nice PS7.3L engine...(and also paranoid that my WVO tank is going to fall off the underside of my chasis! I've had two WVO leaks which have helped to feed this paranoia, one in a very embarassing stop-and-go traffic situation with LOTS of bystanders luckily isolated to the WVO so I could still drive out on diesel)

Any insight would be appreciated.

Thanks!

[SUVeggiecar]

I guess nobody has had any ICP codes that have been caused by their WVO system? That would be good news, I can replace the sensor easily enough.

[erbilabuc]

wait wait wait. What are you using for fuel pump? When was the last time you changed your fuel filter for veggie side.

[SUVeggiecar]

I'm using the Raw Power pump from WVOdesigns.com

I haven't changed the filter on the veggie side, but I've travelled less than 3000 miles on it, and my veggie is filtered through a 1 micron prior to going into my tank. Also, I have a fuel pressure sensor after my pump that shows I run at about 85-90 psi when veggie is on. I hadn't planned on replacing my WVO filter until I saw the operating pressure drop.

[erbilabuc]

85-90 psi is way too much. Can you bring it down to around 60ish? I dont remember the codes but I used to get something similar when my veggie filters would clog.