VSS- Part 1 solved

[Mike Hoenes]

sorry to flog this horse again, but most of the contributors here are about
two feet over my head regarding electronics.
anyhow - just so i'm clear on this....
does this software change mean i can run a DC 2000ppm VSS signal into my 91
TPI 730, and this will replace the normal AC 4000ppm VSS signal the 730
expects?
i dont have an electronic speedo so i dont care about feeds to the
speedometer.

thanks for indulging me.
 ----------
From: Bruce Plecan
To: diy_efi at efi332.eng.ohio-state.edu
Subject: VSS-  Part 1 solved
Date: Tuesday, September 29, 1998 11:52PM

OK, this just in and verified.  If you are running a 1227730 ecm,
from a 90-92 TPI that uses prom aujp, and you want to run a 2000ppm speedo
input do the following,

Change prom address 0018 from D8  to 98
Then use C-6 as the speedo input.

As run on my bench in side beside testing they were +/- 1 mph..
Speed was set, and the the diacom reset and run on the other
ecm to compare mph's.  747 to 730.
Cheers
Bruce         Grumpy lost a dime on this bet, and has been in a
                    fit over it (course that's a days wages here).