Date: Thu, 15 Nov 2007 19:13:12 -0800
Reply-To: Scott Daniel - Shazam <scottdaniel@TURBOVANS.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Scott Daniel - Shazam <scottdaniel@TURBOVANS.COM>
Subject: Re: Fuel pump relay cutout switch
In-Reply-To: <473CC7F4.3010300@cox.net>
Content-Type: text/plain; charset="us-ascii"
!! you got me there all right. I failed to catch that.
However, what I wrote applies exactly to both stock vanagon and a subaru
engine conversion vanagon. The fuel pump logic is precisely the same in both
systems, at least for 90's era subaru engines. Late throttle by wire systems
could be different than that for all I know, or ones using CAN-BUS
architecture, they could be considerably different, but the common ones all
are identical to the vanagon fuel pump relay logic.
the part about the Bentley I wrote - yes, there's no Bentley on subaru,
and their wiring diagrams are 'strange' some , and it would be harder to see
what's what in their diagrams perhaps.
There is hardly any way he would change the fuel pump relay logic in his
subaru conversion.
The ecu still supplies grnd for the relay to energize it etc.
He could toss that whole system of course, but if he did, it's unlikely
he would be asking questions about how to disable the fuel pump relay.
I just went to the original post, and read it carefully. No where did I see
that it reveals it's a soobie conversion, -perhaps that's in some of the
other following posts and answers - I didn't' read all of those.
So does the guy have a plan now ?
-----Original Message-----
From: Mark Drillock [mailto:mdrillock@cox.net]
Sent: Thursday, November 15, 2007 2:28 PM
To: Scott Daniel - Shazam
Cc: vanagon@GERRY.VANAGON.COM
Subject: Re: Fuel pump relay cutout switch
I guess few noticed that he said he has a SUBARU conversion. Without
specific info about the wiring modifications that were made in HIS
conversion it may not help to suggest approaches that presume VW ECU and
VW support wiring.
Mark
Scott Daniel - Shazam wrote:
> Thanks for saying what you are trying to accomplish.
> Your idea is sound, and you could interrupt any of 3 wires at the fuel
pump
> relay,
> - the 'supplies ground' signal from the ECU.
> -the power supply wire to the relay,
> - or the 'hot signal coming out' wire that goes to the fuel pump.
> I'd access the fp relay in that black box above the coil, figure out which
> is the main relay and which is the fuel pump relay and proceed carefully.
>
> It really is clearly indicated in the Bentley current flow diagrams, tho
> they are funny to read at first for sure, but if you find the current
track
> for 'fuel pump' .....you should be able to see the pump, and the relay,
even
> how it works internally, if you understand the basic principle of a relay
> anyway. . They don't always show things really well, but on these basic
> circuits, they're ok.
> Scott
> www.turbovans.com
>
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
> David O'Bryan
> Sent: Wednesday, November 14, 2007 3:01 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Fuel pump relay cutout switch
>
> Help. I'm helpless when it comes to reading a current diagram (but I
really
> did try). I want to install a cut out switch on the wiring to the fuel
pump
> relay and cannot figure out which wire from the ignition switch area will
do
> that. I want to run the lower power wire that energizes the relay thru a
> switch as an anti-theft device.
>
> Any help is appreciated. :-)
>
> Regards,
>
> Dave O
> '87 Westy
>
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