Quote:
Originally Posted by mad_sb
Here is one more table that seems to have an affect on trims, all be it indirectly.
I'm not 100% sure what this table is, but I believe it is a load scalar table. So, whatever the ecu calculates the load to be based on maf is multiplied by the values in this table to determine the final load.. but that's just a guess.
It does not seem to be speed density fail-safe table just based on the fact that the higher vacuum (lower manifold pressure) area have larger values than the higher load (higher manifold pressure). If it were a fail safe table I would expect to see values more like 1.2 or 1.3 in the higher pressure area and .5 in the lower pressure areas. I don't know about anyone else but I am easily hitting 1.2 g/rev at wot between .933 and 1.0 bar MAP.
I have experimented with a few areas of the table and seem to have been able to affect fuel trims with it. For example in an area where i consistently had + fuel trims, the table values were less than 1.0 (like .984) and by raising them, the fuel trims were reduced.
One of these days I'm going to flat fill this table with 1.0's and the closed loop target tables with 14.7 and go out for a long logging drive and see if my hunch is correct.
If anyone has any suggestions or information about this table or any table really I'm always open to comments / discussion either openly on the forums or via PM  |
That table looks very close to the STI's Engine Load Compensation Table. EL Comp uses rpm and manifold pressure to modify the amount of fuel that the ECU commands based on MAF sensor readings. So you are right in your assumption of how it works.
On the STI, this table is used to fine tune for intake manifold resonance and fuel rail resonance. More about the topic on iwsti.com and romraider.com forums. The latter has utilities to help tune a CSV log.
Again on an STI, I try to smooth the MAF sensor scaling, then use EL Comp to correct the mixture and make driving smooth.