Weighting of VE vs. MAF

Quote:

---

Originally Posted by johnsZ06

Very interesting, thanks.

Would be nice if somebody could validate that. :hihi:

---

Yes, that is correct.
Although the values described are calibrated values, so they may not always be 4000rpm, 85kPa etc..

Regards
Paul

Quote:

---

Originally Posted by Blacky

Yes, that is correct.
Although the values described are calibrated values, so they may not always be 4000rpm, 85kPa etc..

Regards
Paul

---

So that means we have access to change em?

my gears are turning already....

Quote:

---

Originally Posted by Dirk Diggler

So that means we have access to change em?

---

Soon... (as soon as we get the web site back up again).
New design web site should be available tomorrow.

Regards
Paul

Quote:

---

Originally Posted by Blacky

Soon... (as soon as we get the web site back up again).
New design web site should be available tomorrow.

Regards
Paul

---

I'm not sure I understand. Is the ability to edit B0120 going to be added to flashscan or is it only available with a custom tune?

Sounds like it will be added and editable jsut like the rest of the parameters

So, effectively, we could tell the pcm to not report MAF errors (P0101, P0102, & P0103), zero out the MAF table, and raise B0120 to an insane number to run in SD?

If that's the case, that'd be slicker'n goose poop!

LOL you want to make positively sure that thing isnt being used. LOL

Take a look at the descriptinos in the screenie Paul posted. You will see that if the maf is diabled via any of the MAF DTC's the PCM ignores that value and applies no correction...

Also, re-read the description posted by Chris from HPT.

The "dynamically calculated" airflow (at <4000 rpm) is not a purely MAP based airflow. It is predominantly a MAF based airflow with a correction factor applied by comparing the difference between the sensed airflow (based on MAF) and the calculated airflow (based on MAP, RPM, TPS, IAT, VE table etc).

The correction factor is adjusted/computed only during steady state airflow. During high airflow changes (stomping on or getting off the throttle) the correction factor is not updated - just used to override the skewed MAF readings that occur in high delta airflow conditions.

The *only* time the PCM uses the MAP calculated airflow exclusively is when the MAF has "failed".

Regards
Paul

I don't know. It almost seems pointless at times to even use a MAF except for the occasional sanity check. :bash: