Date: Thu, 9 Oct 2008 08:14:48 -0700
Reply-To: "B.J.R." <beer_eighty@YAHOO.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: "B.J.R." <beer_eighty@YAHOO.COM>
Subject: Re: Technical question re: Injector firing signal
Content-Type: text/plain; charset=us-ascii
thanks David.
But that is exactly what I ve outlined in my original post
I built my own Double relay, that part of the system has been tested and functions properly.
The ONLY thing I dont have is a signal to complete the injector loop from the ECU, I have 12v to the injectors.
So in an AIRCOOLED engine, where does the computer get the signal to give the injectors the signal???& how do I test it???
If Im getting spark to all my cylinders, then the hall distributor (AKA ignition control unit) is functioning properly. yes or no??
where does the ignition interface with the ECU???
----- Original Message ----
From: David Kao <dtkao0205@yahoo.com>
To: vanagon@GERRY.VANAGON.COM; B.J.R. <beer_eighty@YAHOO.COM>
Sent: Wednesday, October 8, 2008 2:36:36 PM
Subject: Re: Technical question re: Injector firing signal
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
>
>
> --\
