More Questions. now on 94 p/u

[Squash]

Hmmm...  I think that truck is the year after the last
747 computer was used.

Are yo usure about that trailer weight?  11 tons? 
22,000 US pounds?  He should be using a 2 1/2 ton
truck to pull that!

For those mods, the stock ECM will have to be tweaked.
 Possibly you can switch to a 747 since it is
completely "hacked" (if it isn't a 747 already).  

SqUASh

--- Mike Rolica <mrolica at meridian-mag.com> wrote:
> A while back I got the motor on my old mans pickup
> rebuilt.  It is a 94 Fs
> GMC ¾ ton 4x4 Ext cab shortbox.  It has  350 tbi
> 4spd (60L4E I think) 16"
> tires ect ect.
> He does a lot of towing as he has a farm on the
> side, A 20' 2 axle cattle
> trailer- about 11 tons most of the time.  He goes to
> Denver col. Every year,
> new york, ect. Ect at 200 000km the motor started to
> knock when it was
> cold., burn oil ect.
> 
> We rebuilt the motor using Isky custom sing pattern
> cam, 265 adv., 450 lift
> (I think, it's around there)  I did some work to the
> heads :-) gottem swirl
> chamber buggers to flow a little better (80%)  which
> is the reason for the
> single pattern cam.  Used hyperutectic flattops,
> decked block to .005 in the
> hole.  Runs about 10.5:1.  On the dyno it ran
> awesome, used a Oval track
> distributor some 104 oct and a 2bbl Rochester also
> used for oval track with
> an adapter plate  made up.  Plate was kinda crude as
> intake bores were a bit
> out compared to the carb.  Motor made 300hp,
> 405ft-lbs.
> 
> Now in the truck runs like crap!
> Before, the truck ran rough at idle (shook), smelled
> like rotten eggs some
> times. Now it is worse.  Also sound like a diesel
> when cold until goes into
> closed loop,
> Would appreciate it if some people could give me
> info on the following:
> *	Ecm/pcm type number
> *	Type of prom
> *	Suggested mod to programming for new motor and the
> application of
> the truck
> *	Links to anyone having experience on this ECM
> *	What to do
> *	Any suggestions
> *	Bruce? Any comments
> *	Please
> *	Hacks
> *	Where to look
> Mike Rolica
> EXT. 260
>  :-)
> 
> 


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