part throttle fuel tbls and WOT fuel tbls

[ZL1Killa]

I have a 2001 trans am ws6.
If I understand this right the table b3605 EQ ration when in open loop controls the amount of fuel that the car commands in junction with b3618 PE modifier based on RPM????

The VE table B0101 is the table that controls part throttle fuel??


I was on the dyno, and my fuel trims were back and forth between 5~ -5 which is normal after doing a SD tune. The wideband was saying 13.6 AFR while what i should be commanding was around a 13.0(by the PE table) the wideband was calibrated correctly. I started messing with the VE table and nothing changed to the next dyno. So we quit the dyno and took her home. I took my wideband out, which is also calibrated and the actual AFR was 13.6.

SO....I go to b3605 and set it to the 1.13 in a square on the right corner(just like the Autotune by TAQuickness, which the rest of the table is also set to) and I set my PE tbl b3618 to 1.13 (all of it) and I go out with the wideband in the rear O2 hole and my actual AFR is around 12.8~12.9

now I don't know if this was the right way to do this but it changed my AFR to what i wanted.

I was driving around town and doing the normal city driving and watching the AFR on the wideband which stayed around 14.4~14.8 which is what i would expect

[WicketMike]

setting b3605 to 1.13 and the pe table b3618 at 1.00 is suppose to get you at 12.95 at WOT, if i understand it right. but your saying you had to set both at 1.13 to get it to 12.9?

doesnt sound right, hopefully somebody else can chime in and point out why you had to do this, im curious

[superls1]

I have seen posted here that for OL the PCM actually uses the richer of B3618 (PE vs RPM) or B3605 (OL Commanded Fuel). I have never seen anyone from EFILive confirm this. This is the post where I read that: http://efiforum.iqd.co.nz/showthread.php?t=587&page=2
Perhaps Blacky or GMPX can comment on the validity. It seems like an odd thing to me, but there are many things in the PCM that seem odd sometimes.
I would like to know 'how' the code actually works. Is it as simple as:

If B3605 is RICHER than B3618

Use B3605

Else

Use B3618

Or is there a hierarchy? I have seen tunes where B3618 is extremely rich (~10.8:1) and B3605 is 12.95:1. On the dyno runs (I don't have a scan, just the output from the dyno), the AFR seems to be pretty close to 13:1. So, it appears that perhaps it didn't simply choose the richer value of the two tables, but since I don't have a scan I don't know for sure the commanded AFR.