Date: Sun, 2 Aug 1998 21:58:30 -0400
Reply-To: Scarlett Semko <damosem@MAIL.MCO.BELLSOUTH.NET>
Sender: Vanagon Mailing List <Vanagon@vanagon.com>
From: Scarlett Semko <damosem@MAIL.MCO.BELLSOUTH.NET>
Organization: Pre-installed Company
Subject: Re: digijet tool testing
Content-Type: text/plain; charset=us-ascii
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
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