Date: Thu, 24 Aug 2006 11:21:26 -0700
Reply-To: Mark Drillock <drillock@EARTHLINK.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Mark Drillock <drillock@EARTHLINK.NET>
Subject: Re: Strange no start problem - still having issues
In-Reply-To: <20060824172557.93054.qmail@web33503.mail.mud.yahoo.com>
Content-Type: text/plain; charset=us-ascii; format=flowed
Zoran, I wonder if you are working with the right relay. The fuel pump
relay is the one with the fewest wires going to it and the fuel pump
should run constantly with the relay socket jumped between pins 30 and
87. If this is true, you have the right relay.
If so, you should make a set of extension wires for the relay. 4 wires,
with a male spade on one end and female spade on the other end of each.
3 or 4 inches for each wire is all you need for 3 of the wires. Make the
other at least 12 inches long. Then plug the female ends onto the relay
and put the male ends in the relay socket, using the longer one for
pin 85. Be very careful since one relay socket hole is ALWAYS live and
there is no fuse for any of the fuel injection wiring!
With these extension wires you can measure the voltage on each leg and
see if the ECU is providing the pseudo ground on pin 85. You can test
the system by removing the extension wire from pin 85 of the relay
socket, but leave it plugged into pin 85 of the relay. Then with the
longer wire's male end touching bare metal on the body, you can manually
ground pin 85 of the relay while the other 3 extensions are still in
place. With the key off, nothing should happen. With the key on, the
relay should click and the fuel pump should run each time you touch the
male end to bare metal.
Let us know what happens.
Mark
Zoran Mladen wrote:
> Hey folks,
>
> Thanx for the first round of help, but the difficulty continues. We are still getting no ground from the ECU. We have swapped in two other ECUs - although we are not sure they are good, I find it hard to believe I have gotten three bad ECUs.
>
> We also replaced the wire harness and checked this wire to be sure it is working well.
>
> If we jump the fuel pump relay, the car will start and runs fine. This tells me the hall sender is working fine. I was wondering about one thing. I know the fuel injection system is setup to stop the fuel pump running when the engine is not running but the key is still on - so if you are in a rollover and the key is still on but the engine cuts off, the fuel pump will also stop. How is this done? It seems that the ECU simply does not know to tell the fuel pump to run...like it thinks the engine is not turning.
>
> Also, this may be important, the fuel pump should run for about a second when you turn the key on. Not happening on this Vanagon. Simply no ground from the ECU to the fuel pump relay ever.
>
> Other items that have been changed: ignition coil, ignition switch, distributor. Like I said, when jumping the relay, it starts and runs great. Just can't get that darn ground from the ECU.
>
> Help...running out of ideas...
>
>
| 
