gm altenators...and efi

[Bruce Plecan]

I *think* yours is similiar to the one I had in my 84 F-body, I took it to a
good local altern shop and they changed the guts of it, and walked out with
a 108 for like $40US, or about $2,400 Can..

> Well on my way home last night I notice my signl lights were slow to
flash..
> then glancing over at the factory volt gauge, it was at 8..
> I used the original 3 wire 56amp alternator from the v6 in my s10..
> They list 108 amp for the 87 camaro that the tpi was out of....
> I thought since I did add a lot of extra load ie the 30amps the elec fand
> draw, the efi (injectors, ecm, fuel pump) (truck was carbed before) I
should
> use the original altenator.. this way I could use the oem bracket and
belts
> instead of my jigger rig bracket..


> now for the efi.... As the voltage got lower.. it started running fatter
and
> fatter, till it started missing ( have msd and good coil) I think this is
> due to the bat voltage vs injector offset..... also idle whent up
300rpm....
> Is there something in the code to kick idle up if voltage drops below a
> value???....

Dunno about that, but at 8v the ecm might have had trouble with the 5v ref,
or being able to filter things depending on what took a dump in the
alternator.  Open or shorted diodes can fubar lots of stuff
Grumpy
  Welcome back!


>
> Anywho...though it was cool..
> Mike Rolica
> Plant A,
> Magnesium Products Division
> Strathroy
>
> (519)-245-4040  Ext. 265
>
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