There are 2 relays in the engine relay box. Both must click on for the fuel
pump to run. Your symptoms sound like the typical bad or loose connection
in the main fuel injection power supply path. I have seen it many times.
Usually it is at the alternator red wire but can also be at the starter red
wire or the wiring box red wires.

One of the 2 relays clicks on when the key switch has sent power to the
ignition coil. This relay powers up the ECU with power from the red wire
path I mentioned above. The ECU then turns on the fuel pump relay for a
second.

If the ECU doesn't always get power it won't always run the pump relay when
it should.

Mark
On Jul 11, 2016 7:41 AM, "Fuzzy :philippe" <fuzzmeister@gmail.com> wrote:

It's not currently happening and I suspect it's why my van won't start.

I normally hear some relay click off around the fuse box when the fuel pump
stops, but I can't figure out which relay this is.

Thoughts?

Philippe
'87 Vanagon 2.1 Digifant