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Date:         Fri, 19 Oct 2012 06:27:33 -0700
Reply-To:     Alistair Bell <albell@SHAW.CA>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Alistair Bell <albell@SHAW.CA>
Subject:      Re: Random Instant Shutdown
In-Reply-To:  <50814712.4070207@cox.net>
Content-Type: text/plain; charset=us-ascii

To add to Mark's comments on the D15 issue, see my blog post about what I found at that connector

http://shufti.wordpress.com/2011/11/02/vanagon-d15-connector-issue/

alistair

On 2012-10-19, at 5:26 AM, mark drillock wrote:

> If you have ready access to a spare then swap the ECU but keep an open > mind. A simple wiring fault could be involved. If you don't hear the > fuel pump when you turn the key back on after it dies you can forget > worrying about the hall unit of the distributor. > > There is a known failure point in the 86+ dash fuse/relay panel where > the wire connects for the ignition on signal that runs back to the > engine compartment. Pin D15 of the panel gets cooked over time and then > doesn't always make a reliable connection. If this is your problem no > amount of parts swapping in the engine compartment is going to fix it. > > From the ignition switch a black "ignition on" wire goes to the dash > fuse/relay panel and then leaves again on pin D15. From there it is part > of the main wiring bundle that heads back to the engine compartment > wiring box. The black wire continues on to the ignition coil to power > it, and then branches off to power up the ECU relay and enable the fuel > pump relay. > > For testing purposes you can run a wire from the alternator power stud > to the ignition coil where the black wire attaches. There should be a > free male spade available there next to the black wire that comes from > the ignition switch. This will immediately power on the coil and ECU > relay so the key switch won't be able to turn the system on or off while > the test jumper wire is in place. I would put a fuse holder in the > jumper wire at the alternator end. Then use the fuse to turn the power > on and off as needed. I'd use no more than a 10 amp. > > Mark > > > > OlRivrRat wrote: >> Hey All Here's one for ya >> >> A NonMech' good friend has an '89 4spd2wd H2OBxr with 217000mis >> ~ It >> will start just fine & idle & run just fine for a Random period of >> >> time then instantly shutdown as if the key was turned off ~ then in >> most cases it will start right back up again. On the occasions that it >> doesn't >> >> start right back up I can tell that the FuelPump is not doing the >> PreStartRun but then after a few tries or a short wait does come on >> when Key is >> >> turned to Start & will then FireUp&Run.


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