NefMoto

Hey all, I'm running my k04 s4 on a stock M box modified for my 85mm MAF and 630cc evs. I believe the maf is scaled properly, idle trims are currently at ~3%. The problem Im running into right now is that my partial fuel trims are always at 0%. This is with a modified LAMFA table, if LAMFA is set to 1s it will show adjustment. I must be doing something wrong here, can anyone assist? I recently switched to e85 also :).  Thanks.

Did you correct the M box LAMFA axis?

Yes, i have it 50/60/70/80/100

Don't use 100 or it will always interpolate between 80 and 100. Use a value under 100, but close. I use 97.5.

Not if mrfa_w is 100. :P

Op, log lamfaw_w and lamfa_w.

Did you change the actual axis in hex dump, or just the factor axis that you see in the map?

I guess it just makes me feel better having seen mrfa_w<100. I don't see how it would hurt anyway.

Westfarmracing:

Yes, you change the actual axis in the hex. Just changing the factor will just make it look right, even if it is still wrong.

No, you're right, the difference between 97.5% and 100% mrfa_w is inconsequential.

Yikes. This distinction might really really confuse noobs... we need to make sure that in the stage1 tutorial we're explicit about it :)

I know, I know. We're straying!

Should we fuel with BTS? it's a bigger table though....That and we have to deal with KFDLBTS :(

Should I amend the bins to fix the axis issue?

Yeap, i only changed the axis under LAMFA axis, did not do any hex editing. I'll look into correcting that, and then log. My AFRs are so rich part throttle.

If you edited the data in the LAMFA axis parameter in the xdf I created, that edited the bin.

From that, it still isn't clear if you changed the actual bin contents, or just the axis definition.

You need to do the former, not the latter.

Initially I made this mistake. Went to check my fuel trims and they were also 0 on part throttle. Drove it 30 miles or so like that, lost 50 miles on a full tank  :) but it sure drove smooooth. Hehe. Fixed now.

I know this, had the same problem myself. That's why I asked  ;) Guess the problem for OP is solved now anyhow

This is what I did, from tunerpro, opened the "LAMFA axis" table, corrected the load values on top to the proper 50/60/ etc... Sorry if I'm not understanding this, but is that all that needs to be done? This should change the bins contents , correct? I still have 0% trims, but I need to verify mrfa_w and log LAMFA

Yes, and yes, logs would be helpful!

Alright guys, I got some good logs of the car while it was running ok, but they might be irrelevant now. The car was starting just fine in the cold, hot or whatever, does not want to fire now very weird, as it was running PERFECT the night before and the entire week, restarted multiple times. Threw in my old GIAC ecu and it started just fine..... But i think I'm again on the wrong path, I checked my partial trims and they were at 18% with a KRKTE of nearly 0.750. For some proof of concept i turned it even farther up to .0800, and the car as it sits now ( not starting), is at partial trims of 11%. Something is amiss here, I scaled my MAF properly from what I know. Stock maf is 77mm and i run an 85mm, so the % increase was 1.218%, i multiplied all stock maf values by that. There must be something wrong thats causing me to have such high KRKTEs. I'm going to try and empty out this e85 and start tuning again on 91... Appreciate everyones help so far.

hm, well hopefully this will help. I wanted to see if the tune was causing the no start, so i flashed SIX different tunes i have, stock M and my 91 and e85 tunes that I know are working and it would not start with any of them. Nefmoto flasher still connects fine, so does VCDS. So i again tossed in my giac ecu and it starts right away. Hopefully this can help us point to something causing the no starts. Checksums have and always are being corrected and checked also.

The difference between 77mm and 85mm is certainly not 1.2 percent. Additionally, the stock MAF is 73mm ID, not 77 assuming you have an S4.

I'm guessing he meant 21.8% (1.218)?

That would make more sense, but still be off as we know stock is not 77.

I thought stock was 77mm from what I found, didn't that section of the wiki with MAF. If 73mm is stock, then correct me if I'm wrong, 73-85 is 16.44% larger, I will multiply it all by 1.1644 yea? Thanks guys, also, any idea on the no-start deal with this ?

73mm has an area of 4185.39 mm2
85mm has an area of 5674.5 mm2

Difference is around 30 percent, certainly not 16 percent.

someone should slap me.. increase of the area not ID. Thanks for that.  I'll make those changes to my tune, need to figure out the start issue first to test it Ahh!

So the cars back on 91 pisstane until I finish tuning it. I have attached a .csv of a few 3rd gear pulls last night. Some things that are off, my Krkte is at .06100 , still adjusting but the partials are at ~  +4% right now. I am running the EV14 298s, at 4 bar on my b5 2.7t & walbro 450 relayed. I have tweaked the AFRs using the "KR" method, it dips quite rich to 10.7 but otherwise is good. Thanks again for all of your input.

Sorry if these arent configured right, still getting using to me7 logger.

(http://i.imgur.com/vTdzn0c.png)

(http://i.imgur.com/Pb8i6eF.png)

(http://i.imgur.com/4FINZ8O.png)

(http://i.imgur.com/K74Ns0q.png)

(http://i.imgur.com/ywOOBNQ.png)

(http://i.imgur.com/fRZjH1o.png)

(http://i.imgur.com/IQCW7dd.png)


(http://i.imgur.com/eb6GIDm.png)

bumppp, any input ?

Can someone walk me through adjusting the KFMIOP axis? Mine is still factory at 191, and I believe this is limiting me to 14psi regardless of Ldr and KFMIRL. I've read a ton of threads, used WINols but I cannot seem to find where it is located. My map is attached if that helps. Also, is there such thing as a nefmoto stage 2 xdf, Ive seen it mentioned. Thanks guys. !

It isn't, I promise.

Post rlmx_w, rlmax_w, and rlsol_w

Hopefully this is helpful. Currently have LDR set to a calculated ~18psi. Requested boost seems jumpy as well. I have attatched the  2 .csvs with a few 3rd gear pulls also.
(http://i.imgur.com/URjtFWO.png)

And a a big thanks as always to those that help, The car on e85 currently feels amazing, can't wait to sort the boost out and get it really moving !

bump

Any ideas on this latest log? The car seems to occasionally make more than 14psi, but the actual load still does not meet my requested load. I changed KFLHBDN to the rs4 values as well.

(http://i.imgur.com/6kXtwDF.png)


(http://i.imgur.com/ISMfgwN.png)

The PID works based on boost, not load. There is no load feedback control loop.

could kfldimx be limiting me here?