95 LT-1 Idle Cell Comparison - Humidity?

[kur4o]

Initial start was awful - cranking time was 1.7s

Is it dumping more fuel or it is starving. IF it needs more, bumping the key several times will do the trick and should start right away on the 2nd to 4th bump.

Decided to look at lt4 calibration to see how the EOIT is set.
The stock settings are

                                      y-LT4 ;y-LT1 ;f-LT1
RESERVED:337A                 fcb $20   20   20
RESERVED:337B                 fcb $20   20   20
RESERVED:337C                 fcb $20   20   20
RESERVED:337D                 fcb $20   20   20
RESERVED:337E                 fcb $20   40   40
RESERVED:337F                 fcb $20   40   40
RESERVED:3380                 fcb $20   40   40
RESERVED:3381                 fcb $30 ; 4c   50
RESERVED:3382                 fcb $40 ; 4e   50
RESERVED:3383                 fcb $50 ; 50   50
RESERVED:3384                 fcb $50 ; 50   50 
RESERVED:3385                 fcb $50 ; 
RESERVED:3386                 fcb $50 ; 
RESERVED:3387                 fcb $50 ; 
RESERVED:3388                 fcb $50 ; 
RESERVED:3389                 fcb $50 ; 
RESERVED:338A                 fcb $50 ;

There is also baro correction applied

RESERVED:338C                 fcb $1D                 ; 1x10 baro correction for EOIT
RESERVED:338C                                         ;
RESERVED:338C                                         ; SOME TABLE RESULT BYTE_EC
RESERVED:338C                                         ; Baro corr to end of inj
RESERVED:338C                                         ; table value-byte_338d=x
RESERVED:338C                                         ; x+end of inj
RESERVED:338D                 fcb $1D
RESERVED:338E                 fcb $1D
RESERVED:338F                 fcb $1D
RESERVED:3390                 fcb $1D
RESERVED:3391                 fcb $1D
RESERVED:3392                 fcb $20
RESERVED:3393                 fcb $20
RESERVED:3394                 fcb $20
RESERVED:3395                 fcb $20

The baro table runs from 53kp to 104.44kp and stock setting are -3 to 0* EOIT added to main EOIT table.
On lt1 and y and f body the baro correction is set to 0.


ANother fueling routine that left untouched and might play big role in blm splits is the transition fueling. There is some alient math there, that substract fuel on certain condition, possible compensation for the fuel left on the walls unevaporated.

[spfautsch]

Is it dumping more fuel or it is starving.

I'm thinking it was starving, but probably not due to a calibration fault. I noticed when I shut it off I could hear the pump running quite a bit longer than usual. It occurred to me this morning it was probably sucking air (the fuel gauge has been reading near E for a day or two). When I peeked in the filler cap I could plainly see the pump's filter sock, and it seems like the pump might have popped out of the bracket. The y-body fuel tank design is one thing GM solidly botched.

After adding a few gallons and re-priming the system, cold start at 6.5c popped right off. So the O2 shift I mentioned on both sides may be invalid due to air in the fuel system.

The stock settings are

My stock bin had this for the 12df2 table:

20
20
20
20
40
40
40
60
60
60
60
60
60
60
60
60
60

There is also baro correction applied

,,,

The baro table runs from 53kp to 104.44kp and stock setting are -3 to 0* EOIT added to main EOIT table.
On lt1 and y and f body the baro correction is set to 0.

Very interesting find.

There is some alient math there, that substract fuel on certain condition, possible compensation for the fuel left on the walls unevaporated.

This is referred to as Tau in the Banish stuff I have.