Hard to start 747

[Ward]

On Mon, 12 Jul 1999 20:43:45 -0400, Jason Weir wrote:
Hi B. how it going,

The 2d table in question is an VE adder to the 3d VE table.
the values are sumed to make up the final VE, wich is limited to 100% (255
decimal).
See dissassembly blelow.

D6BD:  LD6BD     LDX     #$D37C		; POINT TO VE1 TABLE
D6C0:            JSR     LFB67		; 3D LOOK UP
											
D6C3:            ADDA    L00A9		; SAVE TOTAL VE RESULT
D6C5:            BCC     LD6C9		; IF NO OVERFLOW
											
D6C7:            LDAA    #255		; USE 100 % VE
D6C9:  LD6C9     STAA    L00A9		; SAVE VE RESULT


Ward
 
> CSH-HQ wrote:
> > 
> > At one time there were a set of tables that I mis ID'd as fuel adders
for WOT.
> >   The bottom step at 400 rpm has an effect at crank start fueling.
> > Been a while but in the archives might have some tables with them
changed.
> > Grumpy
> 
> If I remember right Bruce is talking about at table that lived at 0x3c7
> to 0x3d7.  Boy was that fun thinking that table was WOT adder, anyway
> depending on who you ask this table starts at 400 rpm or below. either
> way it defiantly has an affect on fueling during cranking. As soon as
> the ECM sees 400 it starts adding fuel, to go along with the fuel
> already there due to the crank signal. I have reduced the fuel in the
> lower RPM ranges this table, and the main VE table and reduced the fuel
> in the higher temp ranges of the cranking fuel table. This seems to have
> cleared up the hot restart problem, but will it affect cold start
> operation, guess I'll have to wait to winter...
> 
> 
> BTW no leaking injector problem...I stared at them both for 15 minutes
> and didnt see a drip, I guess I need a FP gauge... What was this talk of
> a DIY way to high pressure injector cleaning.. Was this TBI injectors or
> TPI ones??
> 
> 
> 
> Jason
> 
> 
> 
> 
> -- 
> 88 Wrangler - 158K miles and counting
> 258 I6, 4.0 head, Cherokee header, 2.5" High-Flow Cat & Flowmaster
> GM TBI (Soon to be MPI hopefully), Crane 260H Cam
> TJ Fender Flares
> http://jweir.home.att.net
> CNC 4X4 Member - http://cnc.4x4.org/





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