cannot locate fuel map table in the definition. Anybody have experience with these models? 1987 Chevy Camaro 5.7 Auto
cannot locate fuel map table in the definition. Anybody have experience with these models? 1987 Chevy Camaro 5.7 Auto
Assuming the 1227165 definitions are similar to the other ECM/PCMs look under BPW parameters, then VE tables.
89 K1500 Scottsdale 5.7L 5spd 3:42 RamJet cam Dart iron TBI heads 427 PCM swap
95 C2500 Cheyenne 6.5L turbo diesel 4L80e 4:10 DB2-4911 Manual pump conversion 0411 PCM trans control 2Bar COS
05 Outback XT 2.5L turbo gas auto
There are no VE tables in $6E, it's MAF only. All fueling is controlled by MAF tables.
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
-= =-
Well there you have it, I'm wrong again Still learning, errr trying.
89 K1500 Scottsdale 5.7L 5spd 3:42 RamJet cam Dart iron TBI heads 427 PCM swap
95 C2500 Cheyenne 6.5L turbo diesel 4L80e 4:10 DB2-4911 Manual pump conversion 0411 PCM trans control 2Bar COS
05 Outback XT 2.5L turbo gas auto
ok eaglemark, first of all I don't speak computer language. I have no clue what you are talking about when you say $6E. So if I used VE tables before that I have experience with how can I use that experience to tune this differant system? I see the maf tables and I understand how the maf changes in voltage according to air flow but why do we have 6 tables and only 1 column in each instead of how the VE table looks with several columns. I can only assume that I need to open all 6 maf tables and watch for my courser for the current stage that needs to be address right? And please explain the $6E part, for I dont know what that has to do with my question.
$6E is hex for the designation of the mask/definition. You should see that in the XDF file your using to adjust the bin.
MAF is using voltage to frequency... what it's doing is measuring air flow and calculating fuel based on the numbers in these tables.
Working with MAF in six tables is hard and IIRC there are differant multipliers for each table? I'm not well versed in $6E so can't help to much. But you adjust the MAF tables similar as a VE table to increase or decrease fueling needs. One thing about MAF is it has to be a very smooth transition/slope from end to end. Which is hard with changing tables. I think the reason they are split up is the limits of TunerPro, or what limits used to be, it would not scroll and could not see half the table.. steveo had changed the $EE mask to include all in one table.
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
-= =-
ok opened up all 6 maf tables and could not find any trace whatsoever with engine running. as far as the $6E I am not seeing that anywhere.
not a tunerpro limitation.... ECM code limitation. GM chose to split it up into multiple smaller tables and use 8-bit values for all MAF applications except for 94-95 LT1, which used a single 16-bit table to move away from the need for scalars(and on later codes, scalars and offsets(even though oddly enough, offsets are 16-bit....)).
it could be patched to use a single 16-bit table, probably with little to no speed/size penalty, though i don't know of how much use it would actually be.
as for EE..... it has always been a single 16-bit table...... i really don't know who decided to split it up or why, but viewed as it is now is correct. there are certainly more extreme examples that i've come across, like the 60V6 MPFI code that has a 112 row table for helping control idle IAC operation, or the 255 row 60V6 SFI code for low pulsewidth injector offsets....
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