Ignition Modules

[Mark Douwe]

Jim,
Does the Buick run a knock sensor? I would guess that if it's anything like
my '81 Turbo T/A, using the wrong (read same as non-turbo) module would mean
that the knock sensor "side"  the module would become inactive. Switch back
to a genuine or correct module may solve your problem.
Regards,
Mark D
-----Original Message-----
From: JTesta1966 at aol.com <JTesta1966 at aol.com>
To: gmecm at efi332.eng.ohio-state.edu <gmecm at efi332.eng.ohio-state.edu>
Date: Tuesday, July 27, 1999 10:34 PM
Subject: Ignition Modules


>Ok..I have a question for you guys.
>
>Now this is more directed at parts/construction knowledge than ECM hacking,
>so you EE's put yer thinking hats on :-)
>
>I have a 1986 Buick GN, many years ago I had a ignition module fail.
>Aftermarket sources listed the same part for the NA and Turbo cars, where
GM
>listed seperate numbers. I think this is similar to the MAF debate.
>Aftermarket generalizes them. Knowing theres no real *control* in the
module
>(the ECM pulses or varies voltage on (DC%) the EST wire for timing
>adjustments right?) What could be different in these modules. Seems after
the
>swap, (I used an aftermarket one) my car seemed more prone to ping
(although
>it could be my imagination). Just kinda got me thinking if there WERE any
>timing references in the module, or maybe the crank TDC offset was in the
>module (I know theres a setting in the prom, but I'd think that assumes you
>got the right module right?) Anyone have any insight? Dan SMith? Fred B?
you
>guys seem on a component level as well as a programming level...any
thoughts?
>
>Jim
>