Fine tuning AFR in PE

[12sec.5.3]

I'm commanding 11.0 and getting an actual afr of 12.4-5. Tried to lean out in the PE table from 11.0 to 11.1 and actual afr went to 13.6. That is a very big jump from adjusting .1 in PE table. Any suggestions or tips?

[joecar]

Sounds like you need to get your VE and/or MAF tables corrected.

The AutoVE Tuning tutorial is a good starting place:
http://www.efilive.com/download.aspx#downloads7

You will either need a wideband O2 sensor (recommended), or attempt to correct you VE table using LTFT's.

Also see this: showpost.php?p=31617&postcount=5 (http://forum.efilive.com/showpost.php?p=31617&postcount=5)

:cheers:

[12sec.5.3]

Thanks. I figured that. I was trying not to have to deal with all that mess. Downloaded a stock 6.0 lq9 file from this site and copied that VE table to my tune hoping to just run a stock VE table, but it seems that won't work.

[Doc]

Take the high road grasshopper.

[TAQuickness]

Take the high road grasshopper.


agreed.

[Dirk Diggler]

Also make sure you are looking at your PE units in EQ Ratio and not lambda unless you are looking at AFR

[12sec.5.3]

I skimmed through the auto ve write up and I have a couple things. My WB is not connected to efilive, would this be a problem? I'm still running the 99 pcm, and the write up does not say what to do when complete. (All things that had to be changed to get into SD)

[TAQuickness]

Will be much easier to have the WB connected to Flashscan. 99 pcm is fine. When you're done, the next steps depend on what you want to do. I stayed in OLSD, some go to CLSD, some recalibrate the MAF and go back to CL MAF.

Otherwise, the AutoVE tutorial will have you return to CLSD.

[12sec.5.3]

I don't think my AEM WB is compatible with efi live. Also, how do I return to CL MAF when done?

[TAQuickness]

if your WB has a 0-5vdc output it's compatible. Linear output makes things much easier as well.

CLMAF - is described in the last 2 pages of the AutoVE tutorial. Depending on your mods, you may need to recalibrate your MAF. Same concept as AutoVE.

[Redline Motorsports]

Yeah! Listen to these guys! There is no true way to tune the VE table without a WB let alone one that is not tied into the FS. I hemmed and hawhed about it for a while and now that I am using it, it not only dials the tune in right but also will help you better understand how the PCM works.

I am glad I got started with EFI Live when I did and didn't learn tuning the old fashion way! Many thanks to the guys who frequent this site, a few in this thread!:master: that have made it easier!

Do it right it will pay off in the end!

Howard

[12sec.5.3]

I went through the tutorial and set up my SD_auto_ve_tune file. It's ready to be flashed in but another prob occurs. I have a 5 pin MAF sensor and the links in the tutorial weren't working for me. I'll have to try again later I guess. Also, I have to disconnect the WB from the guage and plug into the side port of Flashscan, correct? Will EFI scan tool automatically recognize this?

[joecar]

12sec,

What WB did you say you had...?
What are its AFR's at these voltages:
0V
5V

If EFILive does not already support your AFR/voltages, a CALC pid can be created for you.

If you have the 5 pin MAF/IAT connector, it's okay to leave the MAF connected as long as one of these DTC's occurs
(any of these means the PCM has failed over to the VE table and is ignoring the MAF):
P0101
P0102
P0103

Depends on your WB, does it have 2 outputs...?
I think you might be able to split the signal (one to guage, one to FlashScan).

Joe

[12sec.5.3]

It's an AEM wideband. Bought it from summit. Not sure about the plugs.

[TAQuickness]

Does the AEM WB have any documentation you could reference in regards to it's operation and available outputs?

[joecar]

Is this the one... http://www.aempower.com/ViewCategory.aspx?CategoryID=67

It has 0-5V user programmable analog output.

[12sec.5.3]

Sorry. I've been out. I'm ready to try this. How do I create a map or whatever it is to connect my AEM WB to Flashscan?

[ringram]

You need a calc pid to convert the output to AFR for logging. Take a look at the manual and the calc_pids.txt file under efilive folders to see how to create it. You might find it matches an existing one if you are luck, or even that it exists already.
Then you need to wire it into the little 3 socket oranage connector. The info is in the tutorials from memory.
The hardest bit is wiring it into the car. Especially if using it to simulate NB too.

[joecar]

Check the calculated pids threads here: showthread.php?t=2990 (http://forum.efilive.com/showthread.php?t=2990)

Find out two voltage vs AFR points (at opposite ends of the voltage range) for your AEM WB...
for example:
1V --> AFR 10
4V --> AFR 18

Post those points and we can create a calculated AFR pid for you.

:cheers:

[12sec.5.3]

12sec,

What WB did you say you had...?
What are its AFR's at these voltages:
0V
5V


Joe
0V - 10.00
5V - 19.98

[12sec.5.3]

Maybe a dumb question, but how do I benefit at wot from tuning ve when the tutorial says not to go over 4k rpm's? (unless I misread)

[TAQuickness]

Maybe a dumb question, but how do I benefit at wot from tuning ve when the tutorial says not to go over 4k rpm's? (unless I misread)

Can you please tell me what page the tutorial tells you not to go over 4k?

[12sec.5.3]

Sorry, it must have been a different tutorial. There's so many. In another write-up, it says not to enter PE mode, which I think is wot.... correct?

[TAQuickness]

PE is power enrichment mode and is generally encountered during WOT. However, WOT is not required to get into PE.

If you follow the AutoVE tutorial, it will have you disable PE to avoid the transitions induced by PE.

As you get more familiar with the tuning process (read: your eye becomes trained) you will be able to spot transitions and tune around them.

[joecar]

0V - 10.00
5V - 19.98 Ok, you go like this:

AFR
= (V - 0) * (19.98 - 10) / (5 - 0) + 10
= V * (9.98 / 5) + 10
= V * 1.996 + 10

Sanity check: put 0V and 5V into this equation and see what value it calculates.

Later I can send you a calc_pids.txt file with a calc pid for this.

[12sec.5.3]

I'm sorry man, but I have no clue what that's for.

[joecar]

12sec,

Paste the code below into the file calc_pids.txt located in the folder
My Documents\EFILive\V7\User Configuration:


# ================================================== ============================
# File details
# ------------
#
# This section defines various details about the file format.

*FILE

#Parameter Value Description
#---------- ---------------- ---------------------------------------------------
VERSION 7.1.1 File version
DECSEP . Decimal separator used in this file



# ================================================== ============================
# Units
# -------------------
# See sae_generic.txt for more information on the *UNITS section

*UNITS

#Code System Abbr Description
#-------- ---------- -------- -------------------------------------------------------------
None None "" "No units"


# ================================================== ============================
# Add slot definitions here
# --------------------------------
# See sae_generic.txt for more information on "SLOT" formats
#
#Units Low High Fmt Expression
#------------ ------------- ------------- ---- --------------------------------------------------------------

*CLC-00-021
V 0.0 5.0 0.2 "{EXT.AD1}"
AFR 10.0 20.0 0.2 "{EXT.AD1} * 1.996 + 10.0"

*CLC-00-022
V 0.0 5.0 0.2 "{EXT.AD2}"
AFR 10.0 20.0 0.2 "{EXT.AD2} * 1.996 + 10.0"

*CLC-00-031
factor 0.5 1.5 0.2 "{CALC.AFR_WB1.AFR} / {GM.AFR}"

*CLC-00-032
factor 0.5 1.5 0.2 "{CALC.AFR_WB2.AFR} / {GM.AFR}"



# ================================================== ============================
*PRN - Parameter Reference Numbers
# --------------------------------
# See sae_generic.txt for more information on the *PRN section
#
#Code PRN SLOT Units System Description
#------------------------- ---- ------------ ---------------- ---------------- ------------------------------------------

CALC.AFR_WB1 F021 CLC-00-021 "AFR,V" Fuel "Wideband AFR 1"
CALC.AFR_WB2 F022 CLC-00-022 "AFR,V" Fuel "Wideband AFR 2"

CALC.BEN_WB1 F031 CLC-00-031 factor Fuel "Wideband BEN 1"
CALC.BEN_WB2 F032 CLC-00-032 factor Fuel "Wideband BEN 2"

[joecar]

When you paste the above into calc_pids.txt make sure that there are a few blank lines at the end of the document before saving it.

When you next start the scan tool, goto the the PIDs tab and click on the "Parameter" column heading (sorts on this column).

See image.

http://img222.imageshack.us/img222/9663/pidsws2.png

[joecar]

12sec, check your email. :cheers: