Computer Diagnostics and Tuning Technical discussion on diagnostics and programming of the F-body computers

VE Master

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Old Mar 10, 2003 | 05:49 PM
  #1  
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VE Master

I am using ve master and it will never lean out the ve tables on idle.. Actually.. no matter how many times I use it, it will stay rich!!!

I am running on speed density mode, so a tiny change should affect big time!!!
Old Mar 10, 2003 | 05:59 PM
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I don't think VEMaster does anything at idle.
Your idle is in cell 16, correct?
VEMaster only corrects cells 1-15.
You might want to contact Joe Georger to be sure though.
Old Mar 10, 2003 | 06:01 PM
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Whats his email??? but the car is still richer on all aspects... ???
Old Mar 10, 2003 | 06:48 PM
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Dan is right, I didn't include cell 16 (idle) data in VEMaster, it only uses cells 0-15. I did think about adding it though, but then it was determined that the VE tables are (most likely) not used in normal lt1 operation.

Joe
Old Mar 10, 2003 | 07:13 PM
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Would you consider adding it again Joe? If it's not a whole lot of work?

I've switched to SD mode and would love to able to use VEmaster to tune the idle, rather than by hand (it's taking a while!).

It's a great program--thanks a lot for making it!
Old Mar 10, 2003 | 07:34 PM
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Well.. I've been tunning by hand since VE Master is making my car richer all the time..

How do you read the blm table from datamaster???

JGeorger.. its not **** off your work or something, because I think what you have done is a great work... but sometimes I dont understand why ve master adds to the VE Table when all I see is a rich condition??? In other instances it does lean it out.. but most of the time is making it richer.. something wrong I am doing...

Let me know

Thanks

Last edited by Highlander; Mar 10, 2003 at 07:38 PM.
Old Mar 10, 2003 | 07:40 PM
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Originally posted by JSK333
Would you consider adding it again Joe? If it's not a whole lot of work?

I've switched to SD mode and would love to able to use VEmaster to tune the idle, rather than by hand (it's taking a while!).

It's a great program--thanks a lot for making it!
I'll see what I can do, but don't hold your breath - it might be a while. I know I have some of the code in there to gather the cell 16 data....

Question is, how do you propose to use the cell 16 data? How should I weight it, vs the data in cells 0-15? That is another reason why I never finished it....

Joe
Old Mar 10, 2003 | 07:43 PM
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Why weigh it against the other cells??? do an average as donde before!!!

I think I get your point and it is not to have distant values between cells.. because it will make the car uneven and so.. but as the blms are needed make it...

I am trying to tune SD so I can later on add the MAF and tune it easier or so... I was getting the VE Tables to 100 already and it was still lean.. so I went to speed density and it all went rich.. meaning I got an intake leak...
Old Mar 10, 2003 | 07:48 PM
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Originally posted by The Highlander
Well.. I've been tunning by hand since VE Master is making my car richer all the time..

How do you read the blm table from datamaster???

JGeorger.. its not **** off your work or something, because I think what you have done is a great work... but sometimes I dont understand why ve master adds to the VE Table when all I see is a rich condition??? In other instances it does lean it out.. but most of the time is making it richer.. something wrong I am doing...
No problem, I don't mind explaining. VEMaster is quite simple. All it does is go thru your datamaster logfile and find the average blm for each fuel trim cell 0-15. It then applies that average blm from each fuel trim cell to ve cells that have the same map/rpm boundaries. Since there are only 16 fuel trim cells and over 200 VE cells, 1 fuel trim cell applies it's correction to a whole block of VE cells. Now as to your particulars, you do understand that VEMaster doesn't have an effect as long as your MAF is functioning. At least that is the consensus, with few exceptions. However, I hoped I explained that VEMaster is solely based upon your average blms. Do they react at all when you run VEMaster?
Old Mar 10, 2003 | 07:52 PM
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Originally posted by The Highlander
Why weigh it against the other cells??? do an average as donde before!!!

I think I get your point and it is not to have distant values between cells.. because it will make the car uneven and so.. but as the blms are needed make it...
Let's say your car idles at the same rpm and kpa as (part throttle moving) cell 3. The average blm from cell 16 is 112 and the average blm from cell 3 is 134. What do I do to relevant VE cells? Just average 112 and 134, or bias it more towards 16 (or 3)??? That is the question. My leaning is bias it towards cell 16, since you probaby won't be hitting that cell 3 often, since it' such low rpm....

Joe
Old Mar 10, 2003 | 07:53 PM
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I am NOT using a MAF.. so it does have an effect... I do like the program and seeing the VEM txt file I understood how you did it... awesome work, cuz doing that in excell is mega difficult...

But.. the question is.. in the bottom of the txt file I see the correct averages... They correspond to what I see on the datamaster file regarding rich or lean... then why does it add to the VE table instead of substracting in some points???
Old Mar 10, 2003 | 07:58 PM
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Originally posted by The Highlander
I am NOT using a MAF.. so it does have an effect... I do like the program and seeing the VEM txt file I understood how you did it... awesome work, cuz doing that in excell is mega difficult...

But.. the question is.. in the bottom of the txt file I see the correct averages... They correspond to what I see on the datamaster file regarding rich or lean... then why does it add to the VE table instead of substracting in some points???
I dunno, it should work. Any average blm of over 128 should result in a higher ve and under 128 should result in a lower ve. Any issues with R vs L? I think I'm averaging them now.... Wait, that may be in the version for other platforms. I think the LT1 version had some code to check the adjustment factor - like if the L said to go down so that the R would be unacceptable, it might not make the total adjustment..... I'll have to look at the code.....
Old Mar 10, 2003 | 08:01 PM
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Originally posted by jgeorger
Let's say your car idles at the same rpm and kpa as (part throttle moving) cell 3. The average blm from cell 16 is 112 and the average blm from cell 3 is 134. What do I do to relevant VE cells? Just average 112 and 134, or bias it more towards 16 (or 3)??? That is the question. My leaning is bias it towards cell 16, since you probaby won't be hitting that cell 3 often, since it' such low rpm....

Joe
How can that be possible??? I thought cell 16 was idle only...

As I see it you use the map vs rpm and not the cell itself... you use the cell to make the average... but when you are going to apply the changes the ve table doesn't relate whatsoever to blm cell, but map and kpa.. in that case my recommendation is to:

Weigh it using hits... if you hit 30 on one cell and 70 on the other.. the average x the proportion.. or something like that?

With that wild example you will only make one richer and the other one leaner!! I dont think you can be like that or something... .

Try to weigh it against the most cell hits...

Last edited by Highlander; Mar 10, 2003 at 08:08 PM.
Old Mar 10, 2003 | 08:04 PM
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CAn you send me your latest copy for the lt1?

highlander@caribe.net

Please please please

Thanks
Old Mar 10, 2003 | 08:37 PM
  #15  
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Originally posted by The Highlander
CAn you send me your latest copy for the lt1?

highlander@caribe.net

Please please please

Thanks
Well there is no latest copy as of yet.... When I incorporate cell 16 stuff I'll post links here..... Or keep checking back at
http://home.attbi.com/~jgeorger/vemaster/

Joe



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