Darrell,
Please keep me informed re: the digijet tool. I'm still very interested.

Ron Semko
1984 Vanagon
skyraider@bellsouth.net

Darrell Boehler wrote:

> ------------------------------
> Hi All,
>     Jim  Maginel fellow listee from Cape Girardeau MO.. dropped by with his
> 85 vanagon this afternoon and we proceeded to open up his spare digijet
> after first making sure it was functional.   I had a digijet tool all made
> up and ready to test so our main concern was installing the cable on his
> spare ecu.   We developed a plan for attaching the cable and did so. We
> tested the ecu with cable and all was fine.  We connected the tool to the
> ecu and we had a no start.  We seemed to be  missing coil pulses with the
> tool installed .  I  had wired the digijet  tool coil LED  the same as the
> digifant tool coil LED. It turns out the transistorized  ignition  control
> unit to digijet pin 1  has a plus driver transistor, where  the digifant
> coil driver is a negative driver.  So a quick rewire  of  the coil led and
> we were functional.
>     The digijet seems very similar to the digifant .  Without the heated
> oxygen sensor it takes it longer to start controlling the fuel mixture other
> than that there is little difference with the exception of the ignition
> system  being integrated on the digifant.  The tool seemed  functional,  we
> went on a 5 mile cruise and watched for problems and found none.  All
> readings  seem very similar to the ones I had experienced on the  digifant.
> Like  Temp1 , temp2, oxygen, and afm all read the same voltage   as the
> digifant.   The  digijet has the same 6 digital signals the tool monitors
> power to the ecu, start signal , fuel pump on, throttle switch, coil pulses
> , and fuel injector pulses. Even though the digijet has  a separate ecu pin
> for  each injector all 4 fi ecu pins are common to each.
>     The digijet tool Jim is testing has a built in LCD voltmeter. It is
> about 3x1.5x 0.5 inches.  This  is a feature many listees seem to be wanting
> for the digifant tool also.  I find this to make the tool more convenient to
> use and it seems well  worth the extra cost involved.  The tool has a rotary
> switch that allows selection of the 4 before mentioned analog signals plus
> battery voltage and a probe for testing other points selected by the vans
> person.  The 6 LEDs , rotary switch, a db 25 pin female connector for
> probing digifant / digijet ecu pins and the  LCD volt meter are all built
> into the top of a  6x4x2 inch black plastic box.  The tool  looks good,
> probably could / should be made smaller but I like the present lay   out.
>     Jim is going to test for a while and develop a set of tool operating
> voltages for  the digijet and we can see what develops from there.  The
> digijet tool Jim is testing has  about $50 worth of parts in it.  I need to
> locate some better prices for parts and maybe I can drive the parts cost of
> the tool down some  more.  Any and all suggestions are always  welcome and
> appreciated.
>
> Darrell Boehler
> Makanda Illinois