[ISTA] Datamaster 3.3.0 problems, Data Ok errors every 2 frames

[BT]

Check the wiring for *good* cotinuity from the ALDL connector to the ECM &
ground - sometimes the ground is flakey.  If necessary, use shielded coax
from the ECM to the ALDL.  Check the power into the ECM for AC volts (or,
better, 'scope it) - should be near zero - MSD 6A will introduce noise into
the +12v line; try bypassing it.  MSD sells a *big* capacitor to reduce
this noise.  Run a separate ground from ECM to the laptop.  Is the laptop
powered by an inverter from the vehicle +12v?  If so, try running it on
battery only; noisy power to the laptop will glitch things.

Barry - Sy#26

At 12:39 AM 01/26/2001 -0500, Keith wrote:
>While connected to a local Teal Typhoon down here we noticed that the
>Data Ok box keeps blinking red. It seems to loose the connection to the
>ecm for 1 or 2 frames.
>We tried a different laptop with a different cable - same problem
>Different Ecm - same problem
>tin foiled everything - same problem
>My best guess is that some kind of EMI or RF is causing the problem.
>This Ty does have the AC delete heater box and an MSD 6A installed on
>top of it, but from what he remembers the problem didn't start when that
>was installed.
>Any Ideas?? thanks.
>
>
>-- 
>Keith F.A.S.T.
>Riverview, FL
>'91 GMC Syclone #2173
>'75 Oldsmobile Hurst/Olds
>'92 Nissan Sentra SE-R
>http://www.syty.net
>Direct Forum link -->>>
>http://www.syty.net/cgi-bin/Ultimate.cgi?action=intro
>See my homepage at  -->>> http://home.tampabay.rr.com/keith455
>
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