fuel starvation

[simon_wall69]

The w123 has started suffering a little from fuel starvation and this has coincided with a change to (free!) used veg oil. I assume this is a viscosity issue, so could the oil just be struggling to fight its way through the paper pre-filter or could it be anywhere else?

I suppose I don't really need the pre-filter and could just bin it.

 

[SilverSaloon]

The w123 has started suffering a little from fuel starvation and this has coincided with a change to (free!) used veg oil. I assume this is a viscosity issue, so could the oil just be struggling to fight its way through the paper pre-filter or could it be anywhere else?

I suppose I don't really need the pre-filter and could just bin it.

you need to check all the filyers - prefilter, main filter and dont forget the fuel tank strainer.

one or all of these could be clogged. if you only get fuel starvation at a certain % of the tank full then i would place bets on the fuel strainer.

good luck from a fellow veg user!!

whatever you do - dont bin the prefilter. You need some sort of decent filter BEFORE the main filter.

 

[veggie]

Hi,
Your problem is almost certainly to do with the paper element in the filter getting clogged with the moisture that always remains in the used vegetable oil. Viscosity is always an issue unless like me you have a heated filter and heat exchanger to get the fuel up to a decent temperature.

It all depends on how you clean the oil and a cetain amount of heating is required to boil the water off, but all this can be got from veg websites where all the info is available. A small facet pump in line to help pull the veg to the engine would help but i get starvation issues on my w210 when the filter gets a bit clogged up so give the engine a little bit of help and all should be well.
Good luck.

 

[chancha]

Sorry for hijacking the post but I have a simialr problem on my sprinter 310td. This too runs on veggie and I thought that the filter required changing yesterday after it would not rev past a certain poin. I changed the filter and it was fine until I had ran it for about 10 miles, again it hesitated. Stopped and left it for 1/2 hour and it was again until about 10 miles. This has happened 4 times today. The van has a twin tank conversion. Running on diesel it does it also...... any clues? I was thinking the fuel pump (air lock). Is there anything I can do to prime the pump properly?

Rgds Kevin