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Author Topic: 1.8T Overboosting or other issues?  (Read 27436 times)
LynixGO
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« Reply #15 on: January 08, 2023, 10:55:54 AM »

I don't think it matters.

Ugh its so hard to figure out whats happening…
The boost gauge is also fluctuating
I close to the point to just stop driving the car and sell it…
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nyet
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« Reply #16 on: January 08, 2023, 12:17:46 PM »

According to your logs you did everything right. Duty cycle is around 0% but the boost is increasing while the throttle is closing.
 

Disagree. I don't see this at all in this part of the log. Where are you seeing that?

Log PID vars.
« Last Edit: January 08, 2023, 12:19:41 PM by nyet » Logged

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terminator
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« Reply #17 on: January 08, 2023, 12:55:13 PM »

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nyet
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« Reply #18 on: January 08, 2023, 01:13:17 PM »

Sorry, misread this as there are two independent problems. The main proximate issue (imo) is crazy overboost at peak boost, which is bad PID tuning.

I'd start by getting that under control.

Not sure what is going on with the diverter valves; that is a separate hardware issue that won't be solved in software.

anyway, this right here is a good reason to never do an n249 delete.

He says it goes limp, but never posted if he is seeing codes. I am not so sure the offthrottle spike is causing the limp.
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Please do not ask me for tunes. I'm here to help people make their own.

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LynixGO
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« Reply #19 on: January 08, 2023, 01:26:47 PM »

Sorry, misread this as there are two independent problems. The main proximate issue (imo) is crazy overboost at peak boost, which is bad PID tuning.

I'd start by getting that under control.

Not sure what is going on with the diverter valves; that is a separate hardware issue that won't be solved in software.

anyway, this right here is a good reason to never do an n249 delete.

He says it goes limp, but never posted if he is seeing codes. I am not so sure the offthrottle spike is causing the limp.

Dear Nyet,

i never get any codes.
it just goes in limp every time i let lose gas pedal at high rpm WOT.
and yes i indeed did n249 delete
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LynixGO
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« Reply #20 on: January 08, 2023, 01:27:54 PM »

Nyet,

I have to do ignition on and off to get out of the limp.
after ignition is on the boost is back
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nyet
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« Reply #21 on: January 08, 2023, 01:37:46 PM »

Start with the proximate cause; your PID tuning needs a lot of work.

if you still get limp mode after you fix your PID, reconsider the reasons you deleted the n249. Do you have good ones?
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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 ex
LynixGO
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« Reply #22 on: January 08, 2023, 02:30:06 PM »

I made some changes by analyzing your bin and log.
Reactivated some closed saftey features, tweaked boost pre control/adaption, ignition timing and lambda/fueling.
Knocking is quite apparent, are you running original compression ratio?
If so, I would recommend NGK BKR8EIX.
Try to figure out what I did and if you test it, always be careful, it's at your own risk.
I'm sure there is some more work left to do...

Hello Leonhard

see file attached log with your file

regards......
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LynixGO
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« Reply #23 on: January 08, 2023, 02:31:23 PM »

Still limp mode after letting of gas to shift
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nyet
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« Reply #24 on: January 08, 2023, 02:42:42 PM »

still missing PID vars, but that overboost looks almost under control. IMO IMX is still way too high.

You may eventually be forced to put your n249 back.

did you rethink your reasoning for removing it yet?

BTW this forum is DIY, others should not be modifying your bin for you.
« Last Edit: January 08, 2023, 02:44:19 PM by nyet » Logged

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LynixGO
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« Reply #25 on: January 08, 2023, 03:03:13 PM »

I removed the N249 + N112 + SAI Because the SAI is broken.
so i thought just to remove it all
i can install all back into the engine but i need a new SAI.
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LynixGO
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« Reply #26 on: January 08, 2023, 03:04:55 PM »

still missing PID vars, but that overboost looks almost under control. IMO IMX is still way too high.

You may eventually be forced to put your n249 back.

did you rethink your reasoning for removing it yet?

BTW this forum is DIY, others should not be modifying your bin for you.

Also i am trying myself since June without any good results
im just to stupid to make a good tune myself.i dont understand what u mean with "PID Vars" i dont have any clue of how maps really work in ME7.5
im trying to learn here from my mistakes.
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nyet
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« Reply #27 on: January 08, 2023, 03:19:22 PM »

I removed the N249 + N112 + SAI Because the SAI is broken.
so i thought just to remove it all
i can install all back into the engine but i need a new SAI.

SAI is fine to remove. You may just want the n249 back.
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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 ex
nyet
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« Reply #28 on: January 08, 2023, 03:29:21 PM »

Also i am trying myself since June without any good results
im just to stupid to make a good tune myself.i dont understand what u mean with "PID Vars" i dont have any clue of how maps really work in ME7.5
im trying to learn here from my mistakes.

Code:
ldimn_w             , {BoostPID-I-Min}                   , {Aktueller Wert zur Minimalwertbegrenzung I-Anteil LDR}
ldimx_w             , {BoostPID-I-Max}                   , {Aktueller Wert zur Maximalwertbegrenzung I-Anteil LDR}
ldimxa_0            , {BoostCorrectFactorPID-IRange1}    , {Adaptive Korrektur der LDR I-Regler Maximalwertbegrenzung}
ldimxa_1            , {BoostCorrectFactorPID-IRange2}    , {Adaptive Korrektur der LDR I-Regler Maximalwertbegrenzung}
ldimxa_2            , {BoostCorrectFactorPID-IRange3}    , {Adaptive Korrektur der LDR I-Regler Maximalwertbegrenzung}
ldimxa_3            , {BoostCorrectFactorPID-IRange4}    , {Adaptive Korrektur der LDR I-Regler Maximalwertbegrenzung}
ldimxa_4            , {BoostCorrectFactorPID-IRange5}    , {Adaptive Korrektur der LDR I-Regler Maximalwertbegrenzung}
ldimxak_w           , {ChargeLimitPID-I}                 , {Aktueller korrigierter Begrenzungswert I-Anteil LDR}
lditv_w             , {BoostPID-I-Result}                , {LDR, Tastverh�ltnis vom I-Regler (word)}
ldptv               , {BoostPID-P-Result}                , {LDR, Tastverh�ltnis vom P-Regler}
ldrdtv              , {BoostPID-D-Result}                , {LDR Tastverh�ltnis vom D-Regler}

https://s4wiki.com/wiki/Tuning#PID_scheduling
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ME7.1 tuning guide
ECUx Plot
ME7Sum checksum
Trim heatmap tool

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 ex
LynixGO
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« Reply #29 on: January 08, 2023, 03:34:01 PM »

Code:
ldimn_w             , {BoostPID-I-Min}                   , {Aktueller Wert zur Minimalwertbegrenzung I-Anteil LDR}
ldimx_w             , {BoostPID-I-Max}                   , {Aktueller Wert zur Maximalwertbegrenzung I-Anteil LDR}
ldimxa_0            , {BoostCorrectFactorPID-IRange1}    , {Adaptive Korrektur der LDR I-Regler Maximalwertbegrenzung}
ldimxa_1            , {BoostCorrectFactorPID-IRange2}    , {Adaptive Korrektur der LDR I-Regler Maximalwertbegrenzung}
ldimxa_2            , {BoostCorrectFactorPID-IRange3}    , {Adaptive Korrektur der LDR I-Regler Maximalwertbegrenzung}
ldimxa_3            , {BoostCorrectFactorPID-IRange4}    , {Adaptive Korrektur der LDR I-Regler Maximalwertbegrenzung}
ldimxa_4            , {BoostCorrectFactorPID-IRange5}    , {Adaptive Korrektur der LDR I-Regler Maximalwertbegrenzung}
ldimxak_w           , {ChargeLimitPID-I}                 , {Aktueller korrigierter Begrenzungswert I-Anteil LDR}
lditv_w             , {BoostPID-I-Result}                , {LDR, Tastverh�ltnis vom I-Regler (word)}
ldptv               , {BoostPID-P-Result}                , {LDR, Tastverh�ltnis vom P-Regler}
ldrdtv              , {BoostPID-D-Result}                , {LDR Tastverh�ltnis vom D-Regler}

https://s4wiki.com/wiki/Tuning#PID_scheduling

Thank you,
i will log these

also can i also just put back my combivalve and n249
do i have to put my emission stuff and N112 back into position or can i just block off these ports?

regards.
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