Date:         Wed, 8 Oct 2008 14:36:36 -0700
Reply-To:     David Kao <dtkao0205@YAHOO.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         David Kao <dtkao0205@YAHOO.COM>
Subject:      Re: Technical question re: Injector firing signal
Comments: To: "B.J.R." <beer_eighty@YAHOO.COM>
In-Reply-To:  <955156.38085.qm@web83601.mail.sp1.yahoo.com>
Content-Type: text/plain; charset=us-ascii

You may want to check the two relays that are often the cause of
this kind of problem, i.e. no signal to injectors. One of them
is called fuel pump relay and the other power control relay.
Do not swap the two with each other. Any of the two being defective
can result in a same symptom. So you will want to find a new one
then try to replace one at a time to identify the bad one.

One of the two injector leads is supplied with +12v and the other
will be grounded by the ECU when the ECU fires the injector. If
the ECU is defective it may not be sending the signal to ground the
2nd wire of the injector. If you get sparks that means the Hall Effect
Unit is working in sending the signal to the ECU. If the ECU is not
defective then the two relays are more likely to be faulty (one of
them).

This was discussed many times before. Maybe this is why no one
jumped out to point this out. Good luck.

David


--- On Wed, 10/8/08, B.J.R. <beer_eighty@YAHOO.COM> wrote:

> From: B.J.R. <beer_eighty@YAHOO.COM>
> Subject: Re: Technical question re: Injector firing signal
> To: vanagon@GERRY.VANAGON.COM
> Date: Wednesday, October 8, 2008, 11:04 AM
> I do not know.
>
> Could you be more specific?   IE: how do I test?
>
> Only wire I see directly to the ECU in the wiring diagram
> is terminal #1 at the ECU.
>
> AND
>
> if there is no signal, does that mean bad Distributer or
> bad signal generator (hall distributor)??
>
> Does it matter, because i believe ONLY entire rebuilt
> distributrors are available, not rebuild kits.
>
>
> ----- Original Message ----
> From: Eric Ley <eric_ley@hotmail.com>
> To: B.J.R. <beer_eighty@YAHOO.COM>
> Sent: Wednesday, October 8, 2008 9:45:22 AM
> Subject: Re:      Technical question re: Injector firing
> signal
>
> do you have signal for the distrubitor ??? need to tel the
> computer when to
> send signal to the injectors
>
>
> --\