= 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.

----- Original Message -----

From: Mark Ingalls

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

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