Just wondering if there are any benefits or implications of using one. The pump in question is the OEM VAG intank lift pump from the petrol models. As a lot of people convert petrol cars to diesel on here it may be of interest to some. I understand this pump to be a vane type that does not like being dead headed (ie little or no flow), it was designed to continually keep the fuel bath housing full for the main petrol high pressure EFI pump and thus avoid fuel starvation or air in the injector feed line.So the question is will the Bosch VE pump have enough flow through it to avoid damaging the intank lift pump? And will the pressure the lift pump puts out have any effect on the diesel pump's internal workings due to raised case pressures?It is simple enough to swap out the intank pump for a carb or diesel equipped sender / pick pipe unit. But I wondered if it could be of use and save bleeding issues and keep diesel pump fed with a decent amount of fuel. I understand the later PD engines use a lift pump in the tank.
Higher IP pressure won't affect the running at all but it'll be more prone to leaks.Maybe you could put a regulator in so it would only put like 20psi into the IP.
Oh, I hardly know anything about them new gassers, I know more about the CIS systems.He didn't say what car he's dealin' with either though............
cis has 2 pumps. the external pump being the ~100psi unit, and the in tank being the ~5psi unit.not sure, but i think the mk3 has 2 pumps also..
The other thing I thought about was the bad design of plastic fitting that clips onto the oem fuel filter. Possibly pressurising that may be an issue seeing as they are bad for drawing air as it is.Over here in the UK we can get a different fuel filter off a Rover that does away with the return from the IP needing to go back to the filter. So that eliminates any issues with that.