bleeding problems

farlet · #1 (**permalink**) 03-03-2008, 12:35 PM

Are there any tricks to bleeding the fuel system up. I have a '94 IDI and I am converting to run veg oil on a twin tank system with a heat exchanger. I cannot get the veg oil to bleed through the system. I have sucked it up the pipe to within 12 inches of the lift pump, but it will not bleed up and run.

I wondered if there is a non return valve in the switchover valve on the chassis and now that I have bypassed it, it is running back down to the tank. The strange thing is that the diesel side has bled up fine and is running perfect.

Any help would be greatly appreciated as I have run out of ideas

Thanks

165 · #2 (**permalink**) 03-03-2008, 02:12 PM

Does your wvo tank have some way to vent as the fuel goes out?

farlet · #3 (**permalink**) 03-03-2008, 02:30 PM

Its the regular front fuel tank on an F350, so I assume it vents through the cap. I did try it without the cap just in case, and it made no difference

f100guy · #4 (**permalink**) 03-03-2008, 03:07 PM

how cold is it, it may be too thick.. i saw on extreme 4x4 that there is a kit that starts and warms the truck on diesel and you flip a switch to run it on heated veggie oil and you kill the truck on diesel to eliminate a very hard start problem. the kit ran coolant lines to a tank with a coil inside and back to engine to warm oil. the fuel line also ran out of the tank inside another coolant line to the fuel pump. it worked nicely. you can shoot some air into the fuel tank you have now and with your injectors cracked, you should be able to get the oil to the injectors like that. just don't go too overboard with the air pressure.you might want to try to crank it over while doing this. i would only have 4-5 injectors cracked.

bart f-350 · #5 (**permalink**) 06-27-2008, 07:29 AM

It has most surely to do with the viscosity.

you can see it twoways: 1) the veg.oil beiing to thick, or 2) the standard fuellines beiing to thin.

I'm living in France, and prepairing a switchover to run veggieoil also, especcially since dieselprices here are rocketing skyhigh with 1,54 € / Liter.

@Farlet, would you mind contacting me at since you are one of the special breed driving F-350's here in Europe as far as i know of?

thanks anyway,

Bart