I'm researching about modifiying my 2002 PSD to include a second heated fuel tank for WVO.
I need to know the fuel line circuit, where the filters are, is there a pre-pump AND an injection pump?
Does the fuel have a return line to the tank? or does it just go one way?

I had an older one running off WVO a couple years back, but i kinda fluked it instead of researching and doing it properly.
That said, i dont think i did too bad, I filtered my WVO with newspaper, some guys have used pillow cases or pantyhose to filter it.

I wonder what micron newspaper would be????

Are PSD fuel pumps 1600$? I know the injectors are worth a lot...

A mechanic told me that all 7.3's are mechanical pumps, hard to believe? i think so , but....whatever

I think it would pass a sunday away to drive around collecting used oil and cleaning it and stockpiling in 55 gallon drums!!

 

I don't know much about running WVO, you might check out the bio forum on the site for that, but I can answer your fuel system question.

I'm not sure what you mean by fuel line circuit, but if this doesn't answer what you're after, let me know.

Fuel is picked up in the tank via one pickup tube. Goes from there to the fuel pump, and onto the engine area. Goes into the fuel bowl, where it's split to feed the heads. Out of the fuel bowl, the passenger side head is fed from the rear, and driver's side head from the front. Both are dead head systems, meaning the fuel doesn't flow through the heads. There is a mechanical regulator and return line on the stock fuel bowl. All unneeded fuel is returned to the tank.

There is one fuel filter, it's a 2 micron element, it is located in the stock fuel bowl. The stock fuel bowl is in the valley of the engine, toward the front. It's just under and behind the plastic "Powerstroke" cover, with a circular cap about 5" in diameter.

There is only one fuel pump, it's electric, and it's just a high pressure fuel pump. It's located on the driver's side frame rail, in the area under the driver's door. There is no sort of pump in the tank or any type of low pressure pump. There is no mechanical pump on your Powerstroke, the mechanic is wrong. Luckily, the pump is not expenve. Depending on where you buy it and what kind you get, they can range from around $150 to $300.

You are correct tht the injectors are expensive though. They can range from about $1300 for a stock set to over $3000 for big modified ones.

Everything I've described is for a stock fuel system. Many of the people on here have made modifications to the stock Ford fuels system, because basically, it's a very inefficient design. You'll see additional pre-pump filters, additional pre-high pressure fuel pumps that are low pressure high volume pumps, externally regulated fuel systems that flow the fuel completely through the heads to eliminate the dead head system, elimination of the quick disconnects before the pump because they injest air into the fuel, modifications to the fuel pickup in the tank, and the list goes on. Below are a couple of links to some threads that discuss the fuel system, and some of the modifications. But, that's just the tip of the iceberg. Search around here and you'll find a wealth of knowledge, and some very helpful people to answer your question.
https://www.ford-trucks.com/forums/s...d.php?t=260173
https://www.ford-trucks.com/forums/s...d.php?t=442115
https://www.ford-trucks.com/forums/s...d.php?t=446151

 

I believe the HPOP (hi press oil pump) which drives the injector pressure is a mechanical unit, I could be wrong and someone will surely let me know.That may have been what that mechanic was referring to.
As JT described, the fuel system is a dead end type in each head therefore it has to be modified in order to purge WVO when switching back to diesel, especiall to start the truck in cold weather.
There is a 99-03 kit here, this link is more for informational purposes as it will give you an idea of what is involved to do this mod. The 99-03 kit is part way down the page and it is expensive. There are other kits out there. On an install difficulty scale rating, I would imagine this kit approaching the upper end.
I was unable to view the actual kit and info this morning for some reason, but when I have in the past it had good info, especially on the mods to the dead end fuel rails in order to make it work.
Hope this helps. I don't think this type of mod is one that I would attempt to cobble together on my own.

 

Yeah yeah!! This is exactly what i needed to know...]

You know where the line branches to the 2 heads, if i put another "T" there, and put a check valve from the original fuel bowl, and one on the secondary, I can put a 3-position toggle to switch between the fuel pump in the stock diesel tank, and the pump in the WVO tank! Man this is gonna be sweet!!!
The check valves will keep the WVO from going to the diesel tank, and vice versa.
All i need to do, is install the secondary fuel system, secondary fuel pump, heat all the lines and tank, install the "T", check valves, wire a switch, install a 6637, hahaha

If i switched over my theoretical system, how long would it take to burn the WVO from the fuel bowl to the heads? how much displacement from the fuel bowl to the injectors?
Mabye its time to get my **** over to the alternative fuel threads...
thanks

 

The fuel bowl holds about 1/2 quart of fuel, and there's probably less than a pint in the lines and injectors. How long it would take to burn it would completely depend on engine speed and throttle postion, but I imagine not more than 5 minutes or so. You should be able to smell the difference in your exhaust though.

 

great, now all i have to do is buy some stuff and get into the project...
oh wait !
to buy stuff you need money!, and to get into a project you need free time!

guess mabye next week...

 

The frybrid site I posted the link for has a comparison table among different commercially available systems and gives times that it takes to make the switch. You might be able to interpolate from that.