Hi people,this is my first post as l am a new member.....my L400 suffers from fuel draining/syphoning back into the tank after standing for a while,usually overnight,it didnt used to do this,but now l need to prime the fuel line to start it,then operate the priming pump for about a minute after which it will be fine all day....l am considering a one way valve in the 8mm feed line where it leaves the tank,anyone have any thoughts??....l have the tank out at the moment and am fitting new fuel hoses,but l am confused by the two fittings on top of the tank,connected by a 6mm bore hose with what appears to be a one way valve plumbed in....it has a direction of flow arrow on it but l can blow through in both directions,seems a bit pointless really!!!,any help appreciated,my deli is a 1994/5 L400 super exceed 2.8 diesel 4m40 engine
l400 fuel problem
- Thread starter jack7531
- Start date
That's a 2 way vapor valve and the two fittings interconnected safety valves.
IDT installing a 1 way check valve is a good answer... you've got a leak in the fuel system somewhere (an IP seal is likely given the symptoms) which is only going to get worse over time.
IDT installing a 1 way check valve is a good answer... you've got a leak in the fuel system somewhere (an IP seal is likely given the symptoms) which is only going to get worse over time.
MB845469 - Fuel tank for Mitsubishi Delica Space Gear NSEUF9 - Auto parts
Fuel tank for Delica Space Gear, PD8W frame
mitsubishi.epc-data.com
thanks for the info guys....as you say dust angel,my first thoughts about the valve are that it is faulty,however,sk66 says its a two way vapour valve??,could you expand on that??,also,not sure what an"ip"seal is??.....l do suspect that l could have an air leak somewhere,but it cant be much more than a pinhole,l am tempted to run a complete new fuel feed line,rather than chasing a leak in the existing one,l dont have any visible fuel leaks under the truck,makes it hard to find a leak.