Switchable MAF/SD references for the V6.

[usd2sing]

any update for this being added:

it's a case of "it depends"

the PCM has two options that control the main airflow logic.

Option 1 is the Airflow mode that is used if MAF fails, it can be:
- None
- Speed Density (VE)
- Alpha-N (TPS vs RPM)

Most cars are set for None or SD. This option is only looked at if the MAF fails.

Option 2 is the Airflow transient mode, it can be:
- None
- SD
- Alpha-N

On most cars this is set to none. The transient behavior logic is very simple if it is enabled. if a transient detected (by TPS delta being over a threshold) use the transient airflow source for a specified number of refs. then ramp out again to the MAF.

as an example. 2000 GTP 3800 cal (9389753 for those who are intersted) i am looking at has Option 1 set to SD and Option 2 set to None.

What this means that in most cases the VE table is never looked at and in rare cases only during throttle transients, hence tuning it to change your fuel trims is a big waste of time. As evidenced by Bill beging able to completely zero his VE table without any effect at all.

Before you ask, yes i will add these switch options to the editor as well

Hope that helps,

Chris...

per this thread:
http://www.hptuners.com/forum/showthread.php?t=15778

thanks guys.

[Bill@HPTuners]

added to the main suggestion thread.

[bilemke]

added to the main suggestion thread.

Thank you.

And thank you to the original poster for showing support for something I am very interested in as well. (for a little while, but not long, already)

*prays for something in next beta*