Ben Factor Question

[EVI]

I'm I correct in assuming that the E38.SCALEDUNVE_DMA is what represents the commanded fuel for the E38 PCM? When I enable E38AFRATIO_DMA I can't get a reading.

[EVI]

Did I not word the question correctly? I haven't got any responses. Please could I get some input?

[5.7ute]

I have had no problems with the E38AFRATIO_DMA pid. Have you tried manually validating the pids? Might be worth you posting a log file so we can see if you are doing something wrong.

[GAMEOVER]

I have had no problems with the E38AFRATIO_DMA pid. Have you tried manually validating the pids? Might be worth you posting a log file so we can see if you are doing something wrong.

Works for me too!

[swingtan]

I have also had no problems with E38AFRATIO_DMA.

What vehicle are you trying to log ?

[The Alchemist]

I don't get anything when I use that pid either on a brand new E2 R8 Wagon. I subbed in 14.7 in the sae file instead of using E38AFRATIO_DMA pid for the ben factor calc and that worked fine for most of the VVE table tuning. I rang Paul and he said he will have a look at it
Mike

[mr.prick]

What about SAE.LAMBDA?
Does that work with E38?

[swingtan]

I subbed in 14.7 in the sae file instead of using E38AFRATIO_DMA pid for the ben factor calc

I really hope you didn't do this for the whole VVE as it'll have messed up the table completely. An AFR of 14.7:1 is only a close approximation for cells where you are NOT in PE mode. There you would be wanting something more like 12.6:1 so the VVE will be way, way out in the upper map zones.

Someone with this issue should post both a log and a tune. I'll dredge the log file with a utility I wrote to see what the actual data is.

Simon.

[EVI]

Ok, now we're getting somewhere. Thanks, for the responses! What I did was validate the E38 PIDS. In order for me to get any data that was even in the ball park to what it should be while logging BEN factor for the MAF, I had to create a map using BEN Factor Bank 1 serial wideband LS1 style. Enable that same PID and enable E38scaledunve_DMA. Nothing else I tried would make the MAP work. It would just read 0's. It would work with LS1 style but not E38 style BEN Factor.

[swingtan]

Post the log file.......

[EVI]

Tell me how and what you need to see. I will gladly post it

[swingtan]

When replying, click on the "paper clip" icon above the text box.

A new window will pop up, in it, click on "choose" to select a file.

Navigate to the log file and highlight it and click on "open"

Finally, click on "upload" to upload the file.

Then add any text to the post in the text box as normal.

Simon.

[EVI]

Ok, now I know how to upload. What do you need to see? A file from the tunong software or something from the scanning software?

[swingtan]

the log file. It ends in ".efi" and is what you would be opening to see the logged data from the car.

[EVI]

I hope this worked!

[swingtan]

In that log, you have "GM.AFR" selected. You need E38.AFRATIO_DMA.

When connecting to the ECM via "ScanTool" do the following...


Connect the V2 to the laptop and to the ODB-II port
Click on the green "connect" button ( top right in tune tool ) or press <CNTRL>-F3.
Choose the Correct ECM ( E38 ).
Once connected, click on the icon below the "red" button or press <SHIFT>-F2. This will validate all the PIDs.
Click on the "PIDs" tab and in the "system" box, select E38
Select "Air/Fuel Ratio Commanded"


If for some reason the PID is not supported, there may be an OS issue and tech support will need to check it out.

Simon.

[EVI]

That is what I do. In this log I have the PIDs selected that I have to, to make it work. I have selected the E38.AFRATIO_DMA. PID before but it gives no data.

[The Alchemist]

[QUOTE=swingtan;116817]I really hope you didn't do this for the whole VVE

no no of course I didn't mate...only up to about 75kpa and about 4000rpm.....I still have to get the car back to finish the VVE table in mafless mode at full load you see. Got full load timing and MAF done but that may need revisiting once the VVE is finished. The car went from 240rwkw to 270rwkw with a 2WD Dyno Dynamics Dyno.
Mixtures at full load went from 11:1 to 12.7:1. I can see Holden just adding 10kw a year just by tweaking the factory tune lol

Thanks for your concern :)

[swingtan]

no no of course I didn't mate...only up to about 75kpa and about 4000rpm.....I still have to get the car back to finish the VVE table in mafless mode at full load you see. Got full load timing and MAF done but that may need revisiting once the VVE is finished. The car went from 240rwkw to 270rwkw with a 2WD Dyno Dynamics Dyno.
Mixtures at full load went from 11:1 to 12.7:1. I can see Holden just adding 10kw a year just by tweaking the factory tune lol

Thanks for your concern :)

NP, just making sure it was noted in case someone reading the thread didn't realise and tried doing the whole table.

You could easily make a filter to exclude any data where the commanded fuel was anything but 14.7 and then use a normal MAP to get the VVE correction factors.

EVI: upload a log where you have tried logging with E38.AFRATIO_DMA