Introducing my XJ aka Willain

[Wiggles (Paul Wigton)]

Here is a diagram that might help you understand the system, it might lead you to some other threads that address the problem.

1972 XJ6 Series I fuel system Issue

Nick, the original setup of early carbed cars is quite simple: each tank is connected with one fuel pump “in” and both fuel pumps’ “outs” lead to a “T” in the centre of the trunk containing the valve Mike wrote about. It’s a bit strange though that both parts catalogues for SI and SII cars don’t show any valve, but only a tee pipe C.33901. [grafik] The early SII setup should be quite similar and the parts catalogue puts it better on display: [grafik] In my (limited) experience there always…