PLEASE, don't make me do another search, I have searched for the past two days and I really cannot decifer where to start. If you insist on forcing me to "search", give me some search words that will point me in the right direction.

I have read TRAXIONS article, several times, I have programmed before, but I was using TuerCat and a PocketProgrammer.

I have also read the "Not so 'Black magic'..." article several times and I finally realize that is for the SD system, so the info is different for MAF. I found some good info on the $32B and tuning a little with that, but again it was for TunerCat and I am having difficulty translating some of the table names for applicability in TunerPro.

With that said, I recently purchased an AutoProm because my PP would not work with Win XP without paying $20 for upgraded software. (So I spent 10times more on the AutoProm because I could do everything in one package).

THE ROOT OF THIS THREAD:

I have a stable and very drivable modified ARAP BIN I have been running on a mildly modified 305 for a few years. Yet I notice my BLM is at 108 under some conditions.
What table(s) do I adjust to start with?
Since I want to lean out the engine do I increase the values or decrease them?

In the articles I have also found several things...
1) There are many ways to achieve the same results, but through different means (But I think that was for SD) Is that also true for MAF?
2) Someone else preferrs to force the car into Open loop to adjust peramiters to set the BLM to +/-4 128. Should I raise my Closed Loop temp up to 220°F so I am not in Closed loop to adjust my MAF, or is that something you want to do only with SD and your ability to adjust PW (pulse width)? (I guess yes)

IN SHORT:
To adjust my 165 $6E ARAP BIN in TunerPro 4, which tables should I concentrate on for getting my Baseline to 128? If I had to guess its "Maximum AirFlow vs RPM." Am I on track or not?

Thanks.

 

Once you open TC, you'll see *Mas Air Flow* 1-5.

Within each of those selections, you'll see counts vs Airflow.

Airflow will be expressed in gms/sec, and that's what you can edit.

So if at an airflow of 60 grms/sec your a little lean, you'd look until you found 60 gm/sec, which would be table 3. Then when you see 59. 1 @ 864, you'd want to raise that, a a few grms/sec, and the adjacent entries a couple. The take a test drive, to see if you went to far or not enough. Keep repeating this until you get the BLs you want.

The MAF systems, IMO, are best run in closed loop. That allows the ecm to help fill in for slightly different ariflows at different RPMs. The MAPs allow for that in the way the tables are designed.

The best way to get going is to get a noteboook, and start making small changes, and noting what happens. After a while it will become rather intutive, but getting it *down* initially is a PITB.

 

Grumpy, thanks for the reply, Although I want to be clear on this:
I figure were talking about the tables, but there is 6 tables on mine, I have MAF table #1 thru #6. The relationship is Volts in one column, and Grams/sec. Grams/Sec is adjustable, is that the same thing as your referring to? (I found 59.01 so I am thinking so, but my volts is 2.47 for 59.01, thats no where close to 864)

864 or any number clse to it makes no sence to my information, so I am thinking it must be a calculation or a conversion... Or I am really lost...

THanks again.

John

 

Yes,

The gram/sec is what u want to raise or lower correspondingly to whether you are rich or lean.

U said u were at 108 at a few points.

Basically u need to find the corresponding airflow(gm/sec) and then raise it slightly and then repeat your testing until u get that 124-128 range and you should be good from there.

later
Jeremy

 

thanks thats EXACTLY what I needed

 

Lower the gms/sec vs volts with the BLM below 128. Lower airflow, less fuel added.

RBob.

 

lol

How the heck did I let that one slip in?

Yes Rbob is right.

Lowering it will decrease fuel and raising it will increase fuel.

sorry for the mistake/typo

jeremy

 

WHAT THE HECK!!!



You mean I would have been making my car more rich, scratchimg my head and not understanding what I did wrong...

John

 

I am always happy to help confuse someone, the more the merrier:-)

Actually havent done a ton of MAF stuff other than playing with a friends 89 GTA and my TTA(not MAF anymore).

U should also try searching under MAF tables and scalar(s) as we well.

Should net you more info

later
Jeremy

 

Also make sure the end value in each table matches the starting value in the next table. These are teh points at which the tables are stitched together. Another helpful thing is to do a least squares curve fit using the governing equation for an air meter between known values to smooth the table. This can be a bit tricky so you can just carefully eyeball it. One thing you dont want is sudden changes from one cell to the next. This will cause the engine to do strange things like buck and surge when it crosses between each cell.

 

I will keep that in mind, and thanks for the cross-table info. If I remember the tables right I did notice that there was some repeted values from one to the next.

John

 

It doesn't take much to change it so go just a little at a time. Also I had low blms at idle and lowering the values didn't help. Then I discovered A lean misfire leaves unburned fuel in the exhaust and the o2 sensor sees it as a rich condition. And make sure all ignition parts are good before you start changing fuel values or you will be going in circles like I did. A bad coil ground and I burned about a twenty chips before I found it and had to start over.