Date:         Tue, 11 Nov 2003 22:52:36 -0800
Reply-To:     Austin <austins@IX.NETCOM.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Austin <austins@IX.NETCOM.COM>
Subject:      can a locked fuel pump kill an ECU?
Content-Type: text/plain; charset="us-ascii"; format=flowed

  I go out to start the bus ('87) & after running for ~10 seconds it
dies.  Finally trace that the fuel pump is locked, won't turn at all (yeah
I shoulda installed a filter between the tank & the pump long ago).  But
now the weird thing is that there is no 12v to the pump!  Disconnecting the
ECU & bridging contacts 3 & 13 of the connector to the ECU (per Bentley)
there is solid voltage to the pump leads - & obviously the 2 relays in the
black box over the coil work fine.  Re-connect the ECU & no voltage to the
fuel pump relay, or of course to the pump itself.  Not being an EE the
limit of my electrical trouble shooting abilities is to open the ECU & the
idle stabilizer unit (the box behind the right taillight) and checking for
cold solder joints. NADA.  Is it possible that the locked pump burned out a
transistor or something else in the ECU that should be switching voltage to
the pump?

Austin