- Joined
- Mar 1, 2010
- Messages
- 5,522
That looks horribly identical to the one I got off ebay from another supplier. Perhaps they come in different strengths. I'm in Birmingham tomorrow so I'll call in and suck a few. If I cannot get a weak one I'll take you up on your kind offer.
It is the atmospheric pressure,circa 14 psi, on the fuel in the tank that supplies the engine. The pump on the engine just moves fuel out of the way and pressurises it for the injector pump and spill line. I think there must be a relief valve somewhere to supply the spill pipe. Clearly with the engine not running air must be able to get into the pump or injectors area on a healthy vehicle so atmospheric pressure is working at both ends and the supply pipe forms a "U" tube with the tank so both levels in the tank and pipe are the same. Hence the need for the non return valve. It would be much easier with tank on the roof.
I think that makes sense.
Thanks
Frank
It is the atmospheric pressure,circa 14 psi, on the fuel in the tank that supplies the engine. The pump on the engine just moves fuel out of the way and pressurises it for the injector pump and spill line. I think there must be a relief valve somewhere to supply the spill pipe. Clearly with the engine not running air must be able to get into the pump or injectors area on a healthy vehicle so atmospheric pressure is working at both ends and the supply pipe forms a "U" tube with the tank so both levels in the tank and pipe are the same. Hence the need for the non return valve. It would be much easier with tank on the roof.
I think that makes sense.
Thanks
Frank