Date sent: Sun, 27 May 2001 19:59:38 +0200
From: Paul Mitchell <paul-m@mweb.co.za>
Subject: TR6 fuel starvation
To: Triumphs <triumphs@autox.team.net>
Send reply to: Paul Mitchell <paul-m@mweb.co.za>
List,
I have recently been having an intermittent problem with fuel starvation
on my 1974 TR6 PI. Sometimes, the supply of fuel seems to stop for a few
seconds. After checking all sorts of things, I have formed a theory -
please let me know what you think.
In the fuel tank, there is a wall about 2" high around the feed to the
filter / fuel pump. When the petrol in the tank is low, on a sweeping
left hand bend, the engine will use up all the fuel inside the 'wall',
until the pump is sucking air. It will keep sucking air until fuel has a
chance to refill the wall. Solution: keep the tank topped up. This might
also happen on a straight, where the revs are high, and the rate that
fuel is being drawn exceeds that at which it can leak back in around the
bottom of the wall, giving fuel starvation problems.
Does this make sense, or ring any bells?
Paul
-----------
Paul, I think this would make sense if driving without the swirl pot
The purpose of the pot is to prevent fuel starvation in bends.
To empty the pot you will have to drive left hand circles until the
tank is empty,because the return line is feeding return fuel straight
into the pot and you still have the rather large filter housing
containing around 1/2 ltr.
If you run a Bosch pump the tank outlet could be too small, as the
pump is gravity fed and has in general a much higher pump
capacity than the Lucas pump. A low fuel level together with the
fuel moving around would not create anough gravity to feed the
pump.
Jean R
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