Road tuning filters for MAF

[tonn0297]

Hello, im trying to get some filters going for road tuning my MAF, but i can't seem to get the result i expect... here's the current formula:
([50091.156] > 10) And ([50091.156.avg(500)] > 10) And ([50091.156.avg(-500)] > 10) And ([50091.156.slope(2000)] < 5) And ([50091.156.slope(-2000)] < 5) And ([50020.113] > 20) And ([6310] = 0 or [6310] = 2 or [6310] = 3 or [6310] = 4)

([50091.156] > 10) And ([50091.156.avg(500)] > 10) And ([50091.156.avg(-500)] > 10) And
//Filter out anything under 10% throttle, and a window of 0,5sec before and after it goes over 10% (transients)

([50091.156.slope(2000)] < 5) And ([50091.156.slope(-2000)] < 5) And
//Try and filter transients, if slope is under 5% in the last 2s and 2s after a transient don't log

([50020.113] > 20) And ([6310] = 0 or [6310] = 2 or [6310] = 3 or [6310] = 4)
//Speed over 20km/h and the fuel trim cell not in decel (we really need a <> or NOT in the conditions)

But i can't see a change in the logged data or the count on the cells in the histogram, can some explain why? Ive looked at a few posts here exsplaning but i exspected no data if filter did not work.
Link to the threads ive read
https://www.ctsvowners.com/threads/u...ng-maf.147996/
https://forum.hptuners.com/showthrea...n-ve-afr-error
https://forum.hptuners.com/showthrea...anation-how-to

[tonn0297]

So a tip to others that struggle with the filters, put it in a Math parameter and graph it, it will help alot rather than shooting in the dark... just note you need to close and open the log to update on math change
found out my TPS parameter was wrong.

So now the math looks like this:
[50090.156.slope(3000)]<5 AND [50090.156.slope(-3000)]<5 AND [50091.156] > 10 And [50091.156.avg(5000)] > 10 And [50020.113] > 20

the LOG on bottom graph shows the output of the parameter
VCM_Scanner_gDBBzVfKEV.png

[blindsquirrel]

Attachment 152709

[hjtrbo]

just note you need to close and open the log to update on math change

No you don't. Just duplicate / delete the parameter in the graph setup.

[Pavetim]

On a side but similar note. What would be the parameter to filter out DFCO and COT so you can leave that engaged

[tonn0297]

On a side but similar note. What would be the parameter to filter out DFCO and COT so you can leave that engaged

im using fuel flow, so fuel flow needs to be over 1kg/h before i log, but i do not have COT so no clue

[KillboyPowerhead]

See https://www.hptuners.eu/help/vcm_edi..._fuel_loop.htm (also https://www.hptuners.eu/help/) for some info on fuel trims. Can use PID 6310 to filter out DFCO and other stuff. Log 6310 and see what it is during different driving states, and filter out what you don't want.

COT will change the EQ Ratio when active; could filter out all data when EQ Ratio [50118.238] doesn't = 1.000, for example.

[TheMechanic]

Not sure about the filters. I just shut DFCO and COT off. When done tuning I turn them back on.
I would thing the best way to answer is if someone wants to share a Layout

[blindsquirrel]

Filter strings aren't universal, the PIDs change from controller to controller. Just build them based on what you want included or not and using the specific PIDs you have available. This is why there isn't a one size fits all list of filters you can just copy and paste.