Electric Fuel Pump

[colinthefox]

If you need more convincing, here's a wiring diagram for an electric fuel pump which avoids the danger of pumping on with a stalled engine........

.........and here's one for a mechanical fuel pump........

It's much simpler.

 

[PaulJL]

Depends where the leak is.

Last week I left the petrol van idling nicely to warm up in the barn and went to find something. When I came back the van had stalled, choked itself to a standstill because there was a problem with the carburetor float valve. The carb was full of liquid fuel. If it had been an electric fuel pump, it would have still been pumping fuel all over the floor via the exhaust manifold for five minutes while I was away. Someone else on the VW forum had the same problem yesterday with an electric pump

My personal choice is to stick to mechanical. I understand that others may have different opinions.

You've got me thinking now.. the pump I have on my van can empty the tank in seconds.

 

[S0updragon]

I was wondering if there was a way to wire it up so it cut out if stalled. A mec pump will still pump if stalled but still coasting in gear Mind you I’m highly unlikely to be in the fast lane anyway.

 

[AAA]

BL did it in the 70s/80s! They wired the electric pump through the oil pressure switch, (using a relay). If there is no oil pressure, the pump shuts off. It was done to stop the engine if oil pressure was lost and reduce potential further damage to the engine. For starting, there was a feed from the tag on the starter solenoid to the pump, (which powered the pump without oil pressure when the starter motor was spinning).

 

[jimberlake]

I’ve not done that on mine, just put in the inertia switch - the pump should just pressure up and then hold that pressure as long as it’s 3-4psi