[Diy_efi] Re: Electronic expertise requested

[Daniel R. Nicoson]

Carter,

My hands-on experience is in tuning my 1994 Mustang GT with is the older
EEC-IV, still uses a distributor and a spark module that works with the EEC.
I haven't dug into the spark side of the house yet.  I like this year of EEC
because I know I can control all the necessary parameter including the
ability to run open loop if I run leaded aviation fuels.

When I'm ready to put this all together I will have to get into the wiring
diagrams and see how it all flows.  I know if I stick with stock 1994 Ford
ignition I need two of that module.  I had one fail recently and it is a
common complaint on the Mustang forums.

I appreciate your thoughts.

Dan

-----Original Message-----
From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]On
Behalf Of Carter Shore
Sent: Thursday, June 19, 2003 1:37 PM
To: diy_efi at diy-efi.org
Subject: [Diy_efi] Re: Electronic expertise requested


Dan,
A KISS solution is a 4PDT toggle switch for the wires
to the injectors. Obviously, use a MIL SPEC or
aircraft rated unit.
What about ignition? Are you using the EDIS? It has
the capability to run independently without an EEC,
but depends on the crank sensor, so there's another
SPOF, unless you fit a second sensor (180 degrees from
the primary) and EDIS.
Some of the inputs may be OK to wire to both EEC's,
but the temp sensors depend on a pullup that's inside,
so you'll have to account for that. Either another
switch, or externalize to a single pullup resistor.

Carter Shore



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