[Diy_efi] EEC-V Tuning

[Torbjörn Forsman]

As far as i know, all Ford MAP sensors output a square wave whose 
frequency is a function of the absolute pressure. All of them, the 
stand-alone MAP sensors used with EEC-V and most EEC-IV, as well as the 
sensors integrated in ESC-II ECUs, seem to have roughly the same 
transfer function.
It is easily measured with an oscilloscope or frequency counter. Of 
course, a computer with a sound card and suitable software (for example, 
Cool Edit), can also be used for measuring the output frequency.

Most other EFI manufacturers use, however, MAP sensors with a DC output. 
   This is true for GM and a lot of japanese and european systems. But 
beware, some of them outputs an increasing voltage with increasing 
absolute pressure, while others give a decreasing voltage.

Best regards

Torbj?rn Forsman

Daniel Nicoson wrote:
> Ben,
> 
> The lowest cost way to tune EEC-V that I am aware of is the Moates hardware
> at www.moates.net
> 
> I use the TwEECer on my EEC-IV.  This device works on EEC-V too.
> www.tweecer.com
> 
> I'm not sure about the map sensors.  I am used to MAF sensors, they use a
> 0-5volt signal.  Does your EEC-V use a map?
> 
> Dan Nicoson
> 
> -----Original Message-----
> From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]On
> Behalf Of Ben P
> Sent: Sunday, October 08, 2006 6:02 AM
> To: diy_efi at diy-efi.org
> Subject: [Diy_efi] EEC-V Tuning
> 
> Hi people, I'm just trying to find out whether it is possible to tune the
> ford EEC-V computers, as found in the 1994-2002 Ford Falcons.
> 
> I have heard that it is possible using a special expander board, but I am
> unsure how this works.
> 
> I have also heard of a flash tuner being released to alter maps via the
> diagnostics port, but the companies that do this charge way too much. Does
> anyone know how this is done and whether or not it is possible for the
> diy-er to do this themselves?
> 
> and the last EEC-V question: Do the map sensors for these falcons output a
> voltage or a frequency? I have heard both, and am a little confused.
> 
> thanks
> Ben
> 
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