The fuel pump will not run just because the key is switched on. The fuel
pump only runs when the ECU tells the fuel pump relay to energize. When
you first turn the key on the pump should run for 1-2 seconds then stop.
If it does not do that, you need to track down why. The only other time
the pump is told to run is when the ECU thinks the engine is turning.
The only way the ECU can tell if the engine is turning is when it sees
pulses from the hall unit in the distributor. No pulses means no fuel
pump run signal will be sent.

Mark

VWNut Hawk wrote:

>I have a 88 that runs great.  After about 45 minutes of running, it cuts out.
>Soon after that it stops completely.  I noticed that the fuel pump stops pumping.
>I rigged up 12 Volts and powered the pump manually.  It runs and the engine starts and
>runs.
>
>Any idea where to start looking for a bad component or bad connection?
>
>
>