Date: Fri, 30 Jan 2004 12:09:08 -0800
Reply-To: mark drillock <drillock@EARTHLINK.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: mark drillock <drillock@EARTHLINK.NET>
Subject: Re: What should I be looking at next?
Content-Type: text/plain; charset=us-ascii
The ECU is supposed to turn on the fuel pump relay for a few seconds
every time you turn on the key. If it is not, then there is a fairly
short list of things it could be since you have +12 at the coil terminal
with black wires.
First, jumper between pins 87 and 30 of the fuel pump relay socket. If
the pump now runs, this proves it can and that the problem is not the
pump or it's wiring.
Second, is the ECU getting +12 volts to it's pin 14 and does the ECU
have a good ground at it's pin 13. Do not skip these tests!
Third, if the above all test ok, REPLACE the ECU.
There are a couple more wiring checks you could do but the ECU is more
likely.
The 2.1 ECU lives under the back seat. Hit a sharp knock or 2 a try to
start again. These things get intermittent connection problems inside as
well as components that go bad.
Mark
John Carpenter wrote:
>
> Hi All,
> Thanks for all of the help I've received!
> It has really helped a lot,
> but, unfortunatly my 91 bus is still not starting :(
> ANY Ideas appreciated!
> Heres the scoop.
> First, and maybe pivitol, is that the fuel pump is not giving the initial
> sure..
> The engine cranks over, but no spark...
> Key switch checks out; I tested the #2 relay space, and replaced the switch.
> Fuel pump and fuel injection relays have power and have been replaced.
> Coil has 12v, both terminals when key is on.
> Even if the coil, or the hall sensor were bad, wouldnt the fuel pump still
> surg?
> Last, but by no means least is the ECU.
> I suppose there is no test for it?
> What is the unit behind the air cleaner tubing wall on the passenger side?
> Its number is: 251-907-393-d?
> I assume this is the ECU?
> If it is< I guess that is what I should be looking at next?
> thanks for all of your help so far,
> and thanks in advance for you help up to this point.
> The good thing, is that I got it towed up to my work place,
> the bad thing is that I work 45 miles from my house!
> lordy lordy lordy, its always something! :)
> John C.
> SLC, UT
> 91 Westy...
> OK; Power to the main terminal on the fire wall.
> Power to the
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