95 LT-1 Idle Cell Comparison - Humidity?

**spfautsch** · 10-10-2019

So back to tuning the prime pulse tables - last night I decided to go ahead and cook my closed throttle BLM split into my individual cylinder trims, which amounted to adding approximately 10% to the right side.

Code:

1    82    130
8    7D    125    increased to >    129    81
4    84    132    increased to >    141    8D
3    80    128
6    83    131    increased to >    140    8C
5    80    128
7    7E    126
2    83    131    increased to >    140    8C

No other changes were made save fiddling with some IAC adders relative to A/C.

To my surprise all startup fueling went out the window. Cold, hot, and everything else required cranking until the run flag was set. I just reverted the individual trim changes and startup went back to how it's been for the past several days - not quite perfect but very good. Just a note to anyone tuning on their startup fueling tables - individual cylinder trims seem to apply to the prime pulse and cranking afr tables.

Another thing I noticed when looking at the individual trims - what I gather from the disassembly it appears to my untrained eye that the 0x126db "low" limit might be ignored for transitioning to the off-idle trim table.

Code:

688A    18 CE 26 E5     @290    ldY    #$26E5                            ; bt8_CylBal(AtIdle)
688E    12 26 08 04         brset    L0026, #%00001000, @291           ; at idle (or closed throttle) status bit
6892    18 CE 26 DD         ldY    #$26DD                            ; bt8_CylBal(OffIdle)

I don't see where bit 4 of L0026 is set - so maybe I'm just missing something obvious.