WarthogARJ wrote:Thanks to both of you for input.
I have a 2004 Mk6 2.0 TD Pumatorque engine.
100PS ABFA ENGINE.
Direct injection, NOT common rail.
A thermostatic valve in the filter return would explain a lot.
But there must be something more.
Howeve it’s wrong as far as the return routing is concerned.
knobby1 wrote:Just curios as to why you want to fiddle with or change something that has been working well on millions of transits for many years??.
Lord Knobrot
v8dave wrote:Howeve it’s wrong as far as the return routing is concerned.
No, it is different.
The document is generic and not specific to the transit.
The vp30 pump has been used on many other vehicles, lots of audis use it.
It has a built in lift pump so that a separate item is not required - item 1 in figure 3.
The ford fuel filter housing is designed to work at a little below atmospheric pressure.
It is designed for the injection pump to be pulling fuel through it.
The facet pump when placed before the filter will be pushing fuel through it, this is not how the filter housing is designed to work.
Maybe the thermostatic valve is lifting and allowing fuel into the return circuit.
Why is it a problem to have both supply and return line open ?
Both go back to the tank below the fuel level.
TDDi transits fitted with the VP44 pump have an additional separate electric lift pump on the filter housing.
This is designed to supply the VP44 without over pressuring the system.
VP44 pumps are not known for mechanical failures, but they have a reputation for electrical/electronic failure probably due to thermal cycling and the use of lead free solder.
WarthogARJ wrote:And if you want to convert to veggie, you need to know how the OEM system is setup.
v8dave wrote:WarthogARJ wrote:And if you want to convert to veggie, you need to know how the OEM system is setup.
Sorry, I'm not familiar with the use of 'vegetable' oil as an alternate to readily available diesel.
I thought it was simply a case of putting it into the fuel tank.
WarthogARJ wrote:As i said, i’d rather spend another £50 and get a proper lift pump, in the right place: next to the tank.
WarthogARJ wrote:However the issue is that if you try to bleed the system by pumping through A, even with a temporary pump, or even that stupid flushing bulb, most flow is just sent straight back to the tank.
v8dave wrote:Thank you for taking the time to summarise the vast array of amateur research on the use of vegetable oil.
As far as I'm concerned the use of any fuel in an engine produces 'carbon' emissions, the only difference between the fuels is the timescale over with the carbon has been accumulated.
Many organisations involved in campaigning to protect the environment are against the replacement of conventional diesel with biodiesel because of the intensive agricultural effort required for production.
UK duty payable is governed primarily be HMRC regulations, it will take some time for me to read them and the regulations they reference.WarthogARJ wrote:As i said, i’d rather spend another £50 and get a proper lift pump, in the right place: next to the tank.WarthogARJ wrote:However the issue is that if you try to bleed the system by pumping through A, even with a temporary pump, or even that stupid flushing bulb, most flow is just sent straight back to the tank.
Sorry, these two statements seem to contradict each other
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