Fuel Pump Stays on w/ Ignition in ON position

[salathe]

Howdy -

Trying to get my 87 Syncro started after a 4 year period of sitting and a second notice from the HOA regarding it being not operable and an eyesore.

What I've done:

1. Drain gas, add new with Sea Foam.
2. Had a faulty ignition switch, adding new one.
3. Bench tested relays, they 'seem' be good.
4. Diagnosed faulty fuel pump, added new one.

It still wont start, so I have more tests to do today, but I noticed that the new fuel pump stays on (10+ seconds) with the ignition in ON. It turns off when the ignition is off.

Any ideas what might be causing this?

TIA

[RawUmber]

Given that someone didn't jumper the fuel pump to stay on (bypassing ECU), the pump always being on is likely a problem with the ECU. Normally, Vanagon water cooled ECUs (Digijet, Digifant) start the fuel pump under three circumstances:

The ignition just turned on (ie, the ECU just turned on): ECU turns on fuel pump for ~1s, turns it back off.
Starter engaged: ECU turns fuel pump on as long as starter is engaged
Engine cranking or running (ie, ECU receiving pulses from distributor hall sender): ECU turns fuel pump on.

If the problem was limited to the fuel pump always being on, I would expect it to start. So maybe ECU has other problems or the vehicle does. Trying a known good ECU could help diagnose the problem.

[16CVs]

Is it possible you put the relay in the wrong location? Don't the early ones use 2 separate relays?

Not sure here, just grasping at straws here.

Stacy
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