More Questions. now on 94 p/u

[CSH-HQ]

Reread trany type, he's using a PCM, not ecm.
Grumpy



>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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