Help with talking to 1995 4.3 "W" NON J1850 VCM

[Shannen Durphey]

Don't be too frustrated if ya can't get things to work.  Even using
the GM scantools I had trouble with these vehicles.  They are
definitely not OBDII systems, but I remember using an adapter cable
with the Tech 1.  I believe the baud rate of the S10 was significantly
higher than other OBDI PCMs.
Shannen

EK wrote:
> 
> Greetings,
> 
> FNG here needing help trying to figure out what will talk to the oddball 1995 flash based VCM-A on a 4.3 W vortex motor, 5 sp stick, 4 wheel anti-lock. This thing has a OBD2 16 pin DLC, with all the right pins stuffed for J1850, but won't respond to at all from B&B Electronics OBD2 AT1 Autotap. Sticker underhood says OBD1 compliant. Anyone had any luck or know if the Rinda Diacom stuff or a custom programmed Hughes Auto Xray unit will talk and/or give anything useful? Both of these units only seem to support 12 pin ALDL. Is a 12 to 16 adapter all that required for either of these to talk? BTW, the B&B unit does give plenty of useful info back on a 1999 OBD2 full size truck, including ability to clear trouble codes.
> 
> Eric
> 
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