Quote Originally Posted by Bigcol View Post
I think Mudnut is referring to the "needle & seat" - that governs the fuel level in your carby

you say you have not done / touched / played with the Carby yet, just trying to eliminate the fuel tank / pump as a source of the problem.............?


I would be putting a carby kit through as soon as you have finished sorting the tank / pump

not ALL Nissans have a filter on the fuel pump - the L24 & L26 did not have, but the L20 & L28 did............... go figure
Fuel pump/related electrics definitely have a problem. As you might have seen from the pictures, LRA has done a poor job with electrical wiring for the pump & sender near the tank. Probably one of causes of the problem, if not the whole reason.
I am putting the pump through proper diagnostics regardless of that to make sure it's not on it's way.

Carby's been through a kit not that long ago.
Float chamber fuel level is usually good. Originally it was always quarter full, but last year I adjusted it to be half full all the time.
It went ok since then.
Having said that, since I started having fuel pump issues, I started giving the fuel pump power directly from battery, bypassing the
Fuel Pump Control Unit(Fuel Pump Relay).
That caused the carby to flood few times so far.(as soon as I connect the direct power line to the fuel pump).
So, it sounds like carby also developed a problem.
I don't think it's likely the fuel pump to put out excess pressure.
Fuel pump start getting weaker when they are on their way out don't they? They don't develop extra grunt before they die, do they?