TR4/4A Vapor lock????

[mctriumph]

The most insidious thing is a fuel hose that has swelled internally.Always use fuel injection grade
hoses.Todays gas is crap ,and destroys the made in china regular hoses. The hose at the tank
will give you just a dribble at the pump if this is the case.
Even worse is a leaf from a big tree(sycamore ) that floats about randomly stopping fuel.
This causes multiple changes of fuel pumps for the next 10 years.........
Mad dog

 

[Pgwiegman]

Possible clog in the fuel system. My TR 3 did just that. The line from the tank to the pump had a partially collapsed section and fine grit from a rusting tank would collect and prevent fuel from passing. After sitting and the relief of suctioning the fuel in the line cleared and the car ran until the grit gathered again. New fuel line, no problem. Now the grit is getting collected by the filter in the pump and an in-line filter.

 

[titanfan10]

Possible clog in the fuel system. My TR 3 did just that. The line from the tank to the pump had a partially collapsed section and fine grit from a rusting tank would collect and prevent fuel from passing. After sitting and the relief of suctioning the fuel in the line cleared and the car ran until the grit gathered again. New fuel line, no problem. Now the grit is getting collected by the filter in the pump and an in-line filter.

Thanks

 

[Hamish Racing]

I had weird fuel delivery issues and I put an airline on the fuel pipe from the pump to the tank. The pressure rose then just gave as if a blockage had cleared.
Drove ok for a bit then returned.

I checked the pipe work and some PO had put a rubber pipe to join the metal pipes from the tank the join was about the position of the front of the rear wheel.
See the attached plan.
Swapped it out and cured all my fuelling issues as the pipe had degraded inside. In just the shorted gap between the 2 metal pipe ends.

 

[titanfan10]

Thanks