Hi,
so i finally got a tune that's working well (sort of), but i have an odd issue and i can't tell if it's hardware or my tune.

Problem:
Car runs well in all conditions less than or equal to 15psi of boost.  anything over that (unless i'm going to down hill) i get what feels like a misfire.  THe car feels generalyl like crap, stutters a bit, holds boost well, but feels like it has no power.  It's very strange.  THere is no knock retard, 0 misfire count, and maf reading seems to be ok.

Things i've tried:
-Adding more fuel with tune
-decreasing ignition timing with tune
-took apart cracked coil pack wiring and taped all wires up
-replaced 2 coils.  i also moved them around to see if i got any codes or anything (i didn't)
-disconnected map and drove car -- it ran the same

Ideas/concerns
-I really can't tell what's going on with AFR.  i think maybe ECUxplot is calculating the actual AFR wrong or something?  It shows veyr lean.  I looked at wideband O2 voltage, and i think it's spot on where it should be.  Maybe someone can verify?  is the correct calculator Voltage *2 + 1 ? or is it maybe Voltage * 2 + .96?  not sure what the sensor on this car is.
-bad maf?  i don't think it is as it ran the same when disconnected
-still bad coil wiring -- i don't really buy this.  the updated wiring is only $70 so i might just grab it.. but the swap is kinda a PITA.

Anyway -- i really appreciate any help.  The log is kinda useless, but i attached it anyway.

Tune and XDF are attached for reference.  The attached file might have slightly different LDRXN and KFLDIMX than what was logged, but the car is running exactly the same with this file.

stock FPR still?


I ask because you said you changed fueling around. I took a look and your TVUB looks funny to me. it doesn't show the voltage values for its axis?

I think if it's not software you need to up the fuel pressure to get the injectors out of max DC. you can see in xPlot that @ 5500 rpm the injector DC is maxed out but your AFR is only 16/1 when the BTS map shows AFR should be way lower than that assuming it is being used at the time. Even LAMFA shows AFR should be lower than that so I assume because of the rising lean AFR through the rpm range you are getting high EGT's so the BTS fueling map would be used so that makes matters seem worse. If you've already changed out the restrictive stock FPR for atleast a 4bar OEM unit with this inj DC and AFR, the pump is either worn out or unable to maintain required fuel pressure.

somebody else should look at your WGDC. Is that normal? i guess its just trying to regulate "the taper down" of the boost?
 

who made this file ?   

He will have to read the Wiki over and over again...

Can someone please verify if I'm logging the right thing for AFR or not?  If the car really is leaning out as bad as that graph shows, i will start looking at the fuel system.

KFMIRL -- yes, the last axis is much higher than what the turbo can handle.  This will never get touched though, as LDRXN will be used.  Don't see your point here or how this could be affecting my problem.  Unless your saying somehow torque intervention or something is happening (but i don't think that's what's happening)

KFMIOP - definitely not wrong to raise the last row in this map.  The original values are around 82% which was artificially limiting request.  This was proven in a separate thread by myself and another user experiencing what seemed like artificial boost limitations.

LDRXN - might be a bit high in the high RPMs -- i'll give you that, but that's not affecting this problem (which occurs in mid-range when the turbo can actualyl product over 15psi)

LAMFA -- yes, it's too rich.  I kept it incredibly safe to try to rule out all issues with knock retard or anything like that.

NOW -- do you have any ideas related to why this problem might be happening?  Note: this isn't a rate my tune post.

Also, your first post WAS completely useless and offered absolutely 0 helpful information.  Most people on this forum offer a lot of great advice, so i hate seeing posts like that.

thanks man.  so am i hearing that i AM in fact logging the correct thing for AFR, and it is, in fact, running very lean as soon as boost builds?  Does the O2 voltage seem to match up with the AFR in the graph?  the wideband O2 voltage seems to hover right at 1.5V for almost the entire pull (until the very end where it goes to almost 1.8 -- very lean).  Is 1.5V 13:1 or 12.6:1 -- or is my math way off?

Thanks again!

Need logs!

No. Your fuel system is so inadequate it's a miracle you haven't damaged something.

What turbo? What injectors? FPR? Fuel pump? Other supporting mods?