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Subject:Re: Random Instant Shutdown
From:mark drillock
Date:Wed, 24 Oct 2012 12:44:19 -0700

Exactly right, a hall problem won't stop the fuel pump from cycling on
for 1-2 seconds EVERY time the key is turned on. Look at the ECU or the
power feed to the ECU. I have seen and fixed numerous intermittent and
solidly dead waterboxer vans by finding a bad wire that kills power to
the ECU. Often one right at the alternator main wiring stud. There are
just a few wires that can do this. If you have access to a spare ECU try
it. IMHO everyone who travels in a wbx van should have a known good,
tested in their own van spare ECU along for the ride. There are so many
floating around now that a used one can be found for under $100 unless
you wait until you have to have one quick. It is not that they fail very
often, just that you can swap one in in 2 minutes and then move on to
finding the real problem, or just to keep a shop from ordering an
expensive part you can't return.

Mark

OlRivrRat wrote:
>                 Ken
>
>         I have a spare Dizzy to try but I but am wondering if the
> HallSensor,
>
> good or bad, has any influence when the engine is not running as it
> would not
>
> be sending any signals until the Dizzy starts turning. Is it a
> situation where
>
> the circuit is disrupted & therefore the ECU does not allow the
> FuelPump to do
>
> its PreRunPumpUp?
>
>                                                         ORR ~ DeanB
>