not much i can say about it... it creates a skewed airflow number(for..... some...... reason) that is only used for these O2/INT/CORRCL calcs. why there is also a requirement for the table's result to be skewed up to 16 at a minimum as well, i have no clue.
1995 Chevrolet Monte Carlo LS 3100 + 4T60E
haha yeah i figured, i love that kind of thing; i just wanted some more ideas for documentation. sounds like time to make some shit up.
that CORRCL is a real cherry! i'm going to have fun with that one. i didnt even know EE had that code.
so far results are great, i found a bin that had particularly bad blm splits (pretty close to stock) then pushed the integrator base delay right up to ~400ms at idle, and lowered the entire base CORRCL table by 8. the splits nearly dissapeared, and the integrator seemed much more stable. i'll keep playing with it.
FYI, when O2 sensor moves farther back the INT delay get's increased...
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
-= =-
I've double and triple checked everything else so I believe it has to be in the tuning. The car works great everywhere except when I crank the throttle open from idle. I threw some more more PE fuel at it and it went away but I bricked the PCM which put an end to testing. I finally got the parts from China and fixed the PCM but now there is too much snow to drive the car.Originally Posted by steveo
did i say any different?
i've never had such maniacal laughter after testing a bin
i started from scratch again just to play around
thing is, where i live, in a very slow driving old people area with lots of stop signs and crosswalks, where you have to creep around a lot.. i have always been beating the crap out of the blm system, as well as whatever decel code there is. it never played nice.
after three tries just guessing with increasing delays and dumbing down CORCCL a bit, i managed to improve int/blm stability a LOT, my splits are now +/- 2 on average, and the integrator is much more stable. the log of the integrator could have been mistaken for a lazy o2 sensor before, if you know what i mean. it always seemed, from the logs, that transitions between cells 16/17 to normal cells was part of it.
on a whim i went back, re-enabled transient fuel map, and nerfed BLM cells 16-18 like i was originally planning to do, so everything is happening in regular cells now.
this method worked before, probably because my integrator was so unstable, idle/decel was badly corrupting whatever cell it fell into, and when it ended up being used for driving range, it would stumble. i always had weird drivability issues.
i also tried my best to set my cell boundaries so decel has its own cells to play in, and so does idle.
transient throttle response is awesome again, and i dont have any weird decel surging problems. even if i try, find a cell and blip the throttle it without breaking through hysterisis, all the cells seem very stable, probably because the CORRCL mode works like it should
this is awesome stuff! i dont know how i would have done it without these extra o2 parameters
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