Engine light on getting code 12

[Shannen Durphey]

C'mon over!  It'll only surprise me the first time. 8-)  Prolly oughta
bring over some weight, too.  It'll save the tires until I get used to
things.
Shannen

Mike Rolica wrote:
> 
> He he he.  Wna test mine:-)..
> Mike Rolica
> Plant A,
> Magnesium Products Division
> Strathroy
> 
> (519)-245-4040  Ext. 244
> 
>         -----Original Message-----
>         From:   Shannen Durphey [SMTP:shannen at grolen.com]
>         Sent:   Sunday, July 30, 2000 4:58 PM
>         To:     gmecm at diy-efi.org
>         Subject:        Re: Engine light on getting code 12
> 
>         Sounds fine to me.  Code 12 with a&b jumpered is "no distributor
>         reference pulses", a condition you should definitely have if the
>         engine is not running.  Code 12 is sort of used as a sanity check
> for
>         the ecm.
>         Check other GM cars, you will find the same thing.
> 
>         You haven't mentioned whether or not the engine starts, which would
> be
>         a key issue.  No pun intended. : )  No start with code 12 indicates
> a
>         need to make sure the dizzy is sending out pulses to the ecm.
> 
>         I'm surprised that you don't have a service manual for that truck.
> It
>         should have a description of the code, and a trouble tree for
> checking
>         it.
> 
>         However, if want some personal attention, you can send your Sy to
> me,
>         a professional mechanic, and I'll volunteer to flog it-- I mean test
>         it and make sure everything is ok.
>         Shannen
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