Originally Posted by
High Compression II
The lift-pump is fitted inside the tank, as far as Im aware, there is no NRV fitted If you are getting air in the system its a leak somewhere, ( injector sticking open ?)[COLOR=Black] or maybe the transfer-pump within the main injection pump on the engine has worn allowing drain-back of fuel when standing--This is common on the mechanical VE Injection Pump on which the EDC pump is based, and uses the same Transfer-Pump components.--If this is the case, then the Injection pump will require overhaul and the transfer pump components replaced, and the pump recalibrated. (Been there, Done That with many a VE!) Oh dear-oh dear - megabucks then ? hope its a sticking open injector?
Does the fault happen more when the vehicle is parked facing uphill with little fuel in the tank? Yes, and yes.
Also, Is the elec. pump supplying any pressure--Should be around .4 bar, around 7 PSI or thereabouts, Tee in a fuel-pressure guage just before filter on the rubber pipe to check lift-pump pressure. Yes - recently (2 weeks) replaced and fills a bottle on top of engine quite meaningfully, so seems good (it's new)
Worth also replacing fuel-filter It may be partially blocked and causing the IP to draw air in through its front seal even though the elec pump is operating correctly. Replaced about 1000 miles ago - genuine part.
Check ALL hoses at their connections from tank to IP for leaks and loose fittings. All checked and vacuum and pressure tested - all OK
These are the transfer pump components....
Wish I had this fault instead of the one Ive got!
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