Fuel tank breather issue

[skiron 1]

Hi, I've had a long running issue with my Esprit I'm happily driving along when the fuel pump becomes very noticeable the car loses power and then cuts out.   Usually on a dual carriageway.  Least I get my steps in for the day pushing it.  Anyway yesterday when this happened with a full tank of fuel, I opened both petrol caps and the car started straight away. I have ordered new supply and breather hose and will repipe the system. I can't seem to find the flow lock valves for sale shown on the diagram.  Does anyone know where I can get these???? AND has anyone else had this problem.  

[williamtherebel 446]

I had this problem on my Eclat many years ago. Usually happened on a long run. (scarily, once, in the fast lane of the M6!) Finally found out that the breather pipe on the filler cap was blocked, thus building up a vacuum in the tank until the fuel pump could no longer function.(when I removed the filler cap, sometimes there was a long 'sigh' as the air rushed in. Unblocked it and it was fine.

Hope you get sorted.

[thebartman 127]

I recently replaced the breather hoses on my '85 TE. Assuming it is the same WSM, the plastic breather hose connects to a spigot joining a rubber? hose which then connects to the tank(s). the small locking jubilee style clip was situated behind the metal bracing - and took some fettling to allow enough space the undo the jubilee clip. As for the flow lock valves(non-return valves), these are supposedly to stop any liquid from forcing its way up the tubing. I did not fit these for two reasons ... 1) Couldn't source them 2) I dont believe petrol can force its way around 2 meters of 6mm diameter tubing and around the boot lid. Even if this were to happen, the tubing vents to the outside of the car through the RHS wheel well.

[Chillidoggy 4,476]

Flowlock valves are available from SJ Sportscars.

If I'm correct, these are supposed to prevent fuel leakage in the event of an inversion.