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Author Topic: 1.8t awm BTS fueling below threshold and load higher than requested  (Read 13593 times)
nyet
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« Reply #15 on: August 18, 2017, 12:36:29 PM »

Could you take a look at KZFW

From your logs timing looks fine.
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SB_GLI
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« Reply #16 on: August 18, 2017, 03:52:19 PM »


That said, lambda control looks stable, so the MAF readings might be right, unless KRKTE is wrong and compensating for it. Seems unlikely.


I disagree.  Lambda control is disabling at 3,500 (for who knows what reason), but right before that they and going < 1.  I think MAF readings are a bit high still.  Also MAF reading is > MAF @ Throttle plate, another induction that maf could be reading high.

Ignition angle is wacky because of load > specified.

As a test, modify KFKHFM in the upper load columns.  Take like 10% away and see what happens. 

At 3,500 fuel request goes pig rich.  There's more to BTS fueling than just KLFBTS.   You'll need to work on this as well.

Spool up is lazy, could get more DC for faster spool.... and your diverter valve is shot.
« Last Edit: August 18, 2017, 04:00:10 PM by SB_GLI » Logged
Cadensdad14
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« Reply #17 on: August 18, 2017, 08:09:50 PM »

The lambts module is based around two things from what I see in the me7.5 guide.  The first is a temperature model on front of the cat.  The second is the delta in ignition between optimum and current.  When I look at optimum vs current from the logs there is a massive gap.  Then I found the delta for ignition angle efficiency and there's a spike in inefficiency before I go pig rich.  Ive added a degree and a half of timing at 1760 and 2000 rpm and 140 load and then duplicated the timing map from the ak tune. 

The diverter valve is a new 710n.  Vacuum line to controller is a good silicone vac line.  Could the n249 valve be the culprit?

I'm going to get the revised tune loaded in and get a log and see what that does.
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Cadensdad14
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« Reply #18 on: August 18, 2017, 08:11:30 PM »

The map showing the elevated by a timing issue
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Cadensdad14
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« Reply #19 on: August 24, 2017, 06:37:33 PM »

OK.  Loaded it, logged it, modified it, logged it, modified it again...
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Cadensdad14
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« Reply #20 on: August 24, 2017, 06:52:22 PM »

and the logs
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nyet
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« Reply #21 on: August 24, 2017, 08:34:32 PM »

Start with fixing boost. Not sure what is going on with your PID, but you don't have enough DC and you are liable to run into positive deviation.

Log the rest of the PID parameters.

Get boost to follow req properly and only then move on to fueling and timing. You're more or less safe for now until you get boost set up properly.
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ME7.1 tuning guide (READ FIRST)
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ME7Sum checksum checker/corrrector for ME7.x

Please do not ask me for tunes. I'm here to help people make their own.

Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience.
mister t
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« Reply #22 on: August 29, 2017, 11:35:10 PM »

Looking for more experienced answers to a couple questions.  

Its a 1.8t AWM Manual Quattro A4.  2.0t coils, sai delete, cat delete, single mass 240 mm flywheel with s4 clutch, 93 octane.

Modifications have been made to:
LAMFA and LDRXN and the KAT and SAI crosswords and Euro-bytes

I'm having some issues with lambts coming in when EGT model before cat(tabgm) is around 690.  EGT for part protection (Tagbts_w) is reading 840 at the when I get the drop in AFR current(lamsoni_w).  At the same time, optimum ignition angle(zwopt) is at 25.5 but current ignition angle is at about 8.  From reading the Bosch me7.5 Function and Data Sheet I understand that a portion of lambts fueling deals with inefficient ignition angle.  So my understanding would be that by feeding more timing in through KFZW at higher loads thoughout the whole rpm range.  Am I correct?

Second, I noticed that Engine Load(rl) is up around 170%.  Corrected Engine Load(rl_max) and Requested Engine Load(rlsol_w) are around 160.  Can I push rl_max and rlsol_w higher by modifying LDRXN, KFMIRL, and KFMIOP higher to reach that 170%?

When I have an internet connection for my laptop I will upload my original, first tune, and next tune, with a xdf.[/img]

I'm in the process of tuning my AWM with a Mazdaspeed K04 (the full turbo, not a hybrid) and 630 Dekas.

I also ended up using KFLBTS (lambda for component protection) to dial in the AFR's. Unlike my B6 S4 where I just used LAMFA, I found I needed to use KFLBTS.

The one thing that you may want to consider is that in order to use KFLBTS for a fueling strategy is that you need to zero out the values in KFFDLBTS (factor lambda for component protection).

As I understand it, the values in KFFDLBTS will be applied to KFLBTS when determining the fueling strategy and as you can see, the values in KFFDLBTS are all over the board.

Also, as others mentioned, you need to make sure that the EGT intervention is low enough that the system uses KFLBTS right from the get-go.

Here's a copy of my stage 3 file if you want to have a look see at what I'm talking about.

PS: to those who know what they're doing, please be kind, I know there is some hack tuning in there, but it all seems to work lol.

PPS: I know that my requested fueling values look to be lean, however my KRKTE is a little out and I needed to compensate. Since this is a narrrowband system, the fueling values are essentially arbitrary for all intents and purposes.  

PPPS: this file was written for some 105 octane fuel I was running, hence the high timing values.

PPPPS: *** I'm also running an e-boost controller, so the boost tables could be completely fucked, I just took my best guess based on the data i had at hand. My reason for the e-boost controller is that the lines are a bitch to hook up and since home was 4 hours away when I was scrambling to get all this done, I elected to just use my e-boost controller as I had enough issues getting the car drivable as it was (took about 8 revisions on the side of the road to get the fueling dialed in :p )

Cheers Smiley
« Last Edit: August 30, 2017, 01:35:39 AM by mister t » Logged
focalpoint519
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« Reply #23 on: August 30, 2017, 12:01:50 AM »

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mister t
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« Reply #24 on: August 30, 2017, 01:31:47 AM »

Lol, fuck yeah, TPB rulez!!!! Wink

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Cadensdad14
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« Reply #25 on: September 03, 2017, 06:00:21 PM »

My goal was not to use lambts as a fueling strategy.  Your afr comes from 3 maps, lamfa driver requested, lambts part protection and Lamfakr knock control.  The ecu will select the lowest lambda and use it.  I've seen several other 1.8s going stupid rich way to early due to part protection coming in.  I was trying to reduce the delta between ignition angle and optimum ignition angle to correct the egt model and make lambts come in more appropriately.  I just ended up making the threshold high enough that it wasnt interfering as I was picking up knock before I could get the delta low enough. 
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nyet
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« Reply #26 on: September 03, 2017, 10:49:19 PM »

I was trying to reduce the delta between ignition angle and optimum ignition angle to correct the egt model and make lambts come in more appropriately.

uh. I hope you weren't doing this by messing around with zwopt
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ME7.1 tuning guide (READ FIRST)
ECUx Plot
ME7Sum checksum checker/corrrector for ME7.x

Please do not ask me for tunes. I'm here to help people make their own.

Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience.
Cadensdad14
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« Reply #27 on: September 08, 2017, 07:40:26 PM »

No.  I was adding timing through KFZW.  The efficiency is calculated using the delta between KFZW and ZWOPT.

So I did a check on the health of my turbo today and everything was good.  Shaft play was good, wastegste had good tension and no signs of cracks, Turbines looked great.  So I went into KFLDIMX and added some duty cycle at 2250 and 2500 at the 1000 and 850 mbar regions.  Will test tomorrow once the downpipe goes back on.
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Cadensdad14
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« Reply #28 on: September 09, 2017, 10:15:54 AM »

Can anyone explain to me how to log tans or add it to the list in me7logger gui?
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Cadensdad14
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« Reply #29 on: September 09, 2017, 01:02:26 PM »

Made the changes.  I try and take a log before and after to keep weather from skewing the results, and try to do it in roughly the same patches of road, we dont have much flat straight road in Tennessee.  I had earlier spool.  Still am short of what Im after.  Should I add more wastegate duty cycle?
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