Date:         Mon, 5 Mar 2001 07:03:05 -0600
Reply-To:     Darrell Boehler <midwesty@MIDWEST.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Darrell Boehler <midwesty@MIDWEST.NET>
Subject:      Re: Digijet Digitool Info
Comments: To: Mark Ingalls <ingalls_mark@HOTMAIL.COM>
Content-Type: multipart/alternative;

Hi Mark,
         Thanks.   As you point out the tool will work equally well with a digijet or digifant. All  that is required is to get the proper inputs to the tool. It will also work on an L-jetronic or digifant 2 system.        
    Hooking a led circuit (light emitting diode) direct to coil minus takes out the digitool coil led. I have installed filters on all digitools that I have sold to my knowledge.  The coil leds still occasionally go out.  Early (during  beta testing  stages) I found some digijet distributor  hall units would fail (cause the engine to miss at high rpm).  I switched to using the coil minus signal instead of the hall signal.       
        On the latest (3.0)  version of the tool I eliminated the coil led and the power led. You know you have power if the tool lights up and the meter turns on. Most vans have a tach which will twitch with each coil minus pulse  while cranking. I feel a tach  is better and makes the coil led redundant.  You know you have a probable hall failure if you miss both the coil and fi (fuel injection) pulse.
Darrell
  
                
  ----- Original Message ----- 
  From: Mark Ingalls 
  To: vanagon@GERRY.VANAGON.COM 
  Sent: Sunday, March 04, 2001 11:43 AM
  Subject: Digijet Digitool Info


  Alfred and the List,

  This is how I modified Darrell's Digitool to work with the Digijet FI on my 85 GL.

  For the LED's:

  Pin #13 to:--------à l----------ZZZZZ---------Pin 7 for Power Supply LED

  Pin 13 to----------à l---------ZZZZZ----------Pin 20 for Fuel Pump LED

  Pin 13 to----------à l---------ZZZZZ----------Pin 11 for Fuel Injector LED 



  Pin 21 to ---------à l----------ZZZZZ---------Pin 7 for Start enrichment LED

  Pin 19 to----------à l----------ZZZZZ----------Pin 4 for Throttle position switch LED



  (   -----à means the LED,     ZZZZZ means the resistor )

  I did not hook up a LED for coil pulse. Darrell suggested I use my tachometer twitch for the coil pulse indication, he had reports of using a LED on it had caused the Hall unit to sometimes fail.







  For the Digital Multi-meter part of the tool I used:

  Temp II       02      Temp 1       AFM       Ground

  Pin 2        Pin 5      Pin 14        Pin 15         Pin 7



  Other Notes:

  I soldered a wire to every ECU pin. In retrospect I only need to solder a wire to all the above Pins. 

  I had never soldered before. I used a spare chip I had to practice. I learned to keep the tip tinned for the proper heat transfer. 

  Please E-mail with any comments or suggestions,

  Mark Ingalls

  85 GL

    ----- Original Message ----- 
    From: Kara Bagdan 
    To: Mark Ingalls 
    Sent: Monday, March 03, 2003 11:56 PM
    Subject: Digitool


    Hi Mark,

    I read sometime ago that you built yourself a Digitool for your 85 Digijet ECU.  I am trying to build one too for my 85 Vanagon as well.  I have looked at Darrel's site for the instructions, however his plans are for the Digifant ECUs.  If you have built the digitool for the Digijet, could you please e-mail how you have done it.  I have the Bentley manual, Darrel's plans for the Digifant Digitool, but need some guidance as to which wire connects where for the Digijet.
    Your help will be appreciated

    Thanks

    Alfred
    85 Westy



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