Electrical fuel pump issues

[kerian159]

I've got a weird issue bus ran perfect last weekend then went to drive it to my parents (half a mile) it makes it about 5 min and dies. Turn the key on and nothing from the fuel pump. Let it sit for a while it fires up and runs (cooler evening temps, nw fl). I've tried searching but it brings up over 900 entries. Thanks in advance.
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1976 Type II Westy P22

"Growing older, but not up!"

[pioneer1]

typical of a plugged fuel line or filter. When it sits for a minute without a demand the gas manages to seep through until it runs out again.
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"Always waiting for tomorrow ruined everything"

'85 Porsche 911 Targa

'76 Westfalia project

[kerian159]

That's what I thought but I can't even hear the pump running.
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1976 Type II Westy P22

"Growing older, but not up!"

[pioneer1]

I don't think the pump runs until the engine is turning over?
_________________
"Always waiting for tomorrow ruined everything"

'85 Porsche 911 Targa

'76 Westfalia project

[kerian159]

It comes on when I turn the ignition on.(normally)
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1976 Type II Westy P22

"Growing older, but not up!"

[Tcash]

[kerian159]

Ok I may have not been clear on when I say the fuel pump is running when I turn the key. It is in the "on" position as it would be during normal operation of the vehicle and the fuel pump normally comes on I turn it a bit further for the starter to engage and it runs normally. I drove the bus a couple times over the weekend and finally had it show the same problems. Fired up normal, backed out of the driveway and started for my parents and got to the same exact spot (i'm guessing the amount of fuel in the carb bowls dictating this ) and it died. When I turned the key on I could not hear the normal fuel pump thump. I'm going to be pulling it apart sometime this week, checking voltage and to see if the pump is actually pumping.
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1976 Type II Westy P22

"Growing older, but not up!"

[Tcash]

Note the 3 ignition switch positions.
The fuel pump is supposed to only come on in position #3 as the starter engages. Commonly known as the cranking position.
After the engine starts. A set of contact points in the AFM (air flow meter) close and keep the pump on.
https://www.thesamba.com/vw/archives/manuals/76bus.php

Take a look at this write up on the Fuel pump relay.
thnx to amskeptic
Double Relay Explained. . . In Color!

Good luck
Tcash

[kerian159]

I'm thinking a PO wired it different when they took out the fuel injection
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1976 Type II Westy P22

"Growing older, but not up!"

[busdaddy]

I suspect you are on to something, sounds like carbs from this statement:

[kerian159]

I figured out the problem. When the PO re-wired the fuel pump they didn't do a very good job of it. It's been on my list of fixes just never got to it
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1976 Type II Westy P22

"Growing older, but not up!"