More Questions. now on 94 p/u

[Mike Rolica]

Your on the ball grumpy ;0). Must be getting better!   Correct, pcm is a 625
I believe.
Mike Rolica
EXT. 260
 :-)


	-----Original Message-----
	From:	nacelp at jvlnet.com [SMTP:nacelp at jvlnet.com]
	Sent:	Monday, October 25, 1999 6:48 PM
	To:	gmecm at efi332.eng.ohio-state.edu;
gmecm at efi332.eng.ohio-state.edu
	Subject:	Re: More Questions. now on 94 p/u

	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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