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Author Topic: How does KFLDRL 'linearise' boost?  (Read 61220 times)
ddillenger
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« Reply #30 on: June 01, 2014, 02:35:15 PM »

It looks like your code is going to be P0299, or underboost limp.
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carsey
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« Reply #31 on: June 01, 2014, 02:41:57 PM »

No boost related fault codes at all.
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nyet
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« Reply #32 on: June 01, 2014, 07:03:52 PM »

No boost related fault codes at all.

You can't go limp w/o throwing codes
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nyet
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« Reply #33 on: June 01, 2014, 07:05:02 PM »

All I did was remove the header info and the rows for the variables

Don't do that. ECUxPlot depends on the headers for all kinds of things

but you will probably have to go through them and pick out the actual runs at 100% throttle.

ECUxPlot does this for you. Only post unedited logs.
« Last Edit: June 01, 2014, 07:06:46 PM by nyet » Logged

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userpike
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« Reply #34 on: June 01, 2014, 09:32:23 PM »

I think the reason for limp must happen a few times before it throws the code. not 100% sure though


carsey, whats the altitude in your region?


maybe the turbo can't compensate enough for being in the mountains?  Undecided
« Last Edit: June 01, 2014, 09:34:31 PM by userpike » Logged
carsey
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« Reply #35 on: June 01, 2014, 10:00:04 PM »

Had a look there and maf signal too high

Must be the cause then
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carsey
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« Reply #36 on: June 01, 2014, 10:02:20 PM »

135m or 445ft I think
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userpike
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« Reply #37 on: June 01, 2014, 10:37:36 PM »

bad MAF, time to it change out.

if you have time, log a run with the MAF unplugged.

Just curious, have you experienced lean spikes coming on throttle? I ask because I had this same MAF code but I also had a bad B1S1 02 sensor fail one of the diagnostic tests VCDS uses to determine if the sensor is faulty. The ECU threw a code for it one time in the past. After repeated DTC resets for various miner things it never came back. I did the checks anyway and ended up changing it out. So I dunno which was the cause for my lean spikes.
« Last Edit: June 01, 2014, 10:42:33 PM by userpike » Logged
carsey
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« Reply #38 on: June 01, 2014, 10:51:09 PM »

Brand new maf the other week before is done the crank seal.  Bosch sensor too
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ddillenger
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« Reply #39 on: June 01, 2014, 10:55:05 PM »

It's not the MAF, you're likely exceeding the values of KFLDMX.
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carsey
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« Reply #40 on: June 01, 2014, 10:59:25 PM »

That's the map I'm raising next.  Got the file ready to flash on at some point.  Hopefully it stops the soft limp mode.  Worth touching kfmldmn too?
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userpike
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« Reply #41 on: June 01, 2014, 11:07:45 PM »

It's not the MAF, you're likely exceeding the values of KFLDMX.



this will trigger a signal too high code for the MAF?


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nyet
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« Reply #42 on: June 01, 2014, 11:11:36 PM »

yes

there are several MAF sanity checks.... check the FR..
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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.
userpike
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« Reply #43 on: June 01, 2014, 11:26:01 PM »

yes

there are several MAF sanity checks.... check the FR..

keyword please? I put kfldmx in the search box in my pdf reader and nothing, kfldimx and got a short description of the map and the schematic showing the to's and fros.


sanity checks = diagnostic testing procedures?






« Last Edit: June 01, 2014, 11:37:41 PM by userpike » Logged
ddillenger
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« Reply #44 on: June 01, 2014, 11:30:44 PM »

DMX is the threshold for max airflow before MAF diagnosis is triggered. It is in kg/h.

There is also DMN, which is the threshold for minimum airflow before diagnosis is triggered, but generally speaking this isn't touched (unless you're using a HUGE housing with shit resolution).
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