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Author Topic: 1.8T Overboosting or other issues?  (Read 27802 times)
nyet
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« Reply #30 on: January 08, 2023, 03:46:54 PM »

You really only need the n249 -> DV bits.
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LynixGO
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« Reply #31 on: January 08, 2023, 03:51:37 PM »

You really only need the n249 -> DV bits.

Ah..

So i dont need combi valve + N112 to have functional N249?

so I need the following

N249
+ Vacuum reservoir + lines from intake to N249 + check valve

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nyet
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« Reply #32 on: January 08, 2023, 03:54:04 PM »

Ah..

So i dont need combi valve + N112 to have functional N249?

so I need the following

N249
+ Vacuum reservoir + lines from intake to N249 + check valve

Correct, but I could be mistaken; may want to double check with someone else, as I've not done this personally on a 1.8t with SAI
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LynixGO
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« Reply #33 on: January 08, 2023, 03:57:13 PM »

Correct, but I could be mistaken; may want to double check with someone else, as I've not done this personally on a 1.8t with SAI

Okay thanks i will put the n249 in the car tomorrow.
also do i need to change ESKONF back to original after putting n249 back?
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nyet
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« Reply #34 on: January 08, 2023, 04:02:36 PM »

Yes, probably.

The thing is, looking at your logs, the DV should have opened from mani vac w/o the 249 (or the vac res)... maybe its not plumbed right, or it is broken?

Also, I dont know of any case where it would cause limp w/o a DTC.
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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 #35 on: January 08, 2023, 04:12:01 PM »

My DV is straight from manifold connected with vacuum line

I have 4 connections on the manifold 2 are blocked

i have 1 vac line to FPR and 1 vac line to DV
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Leonhard
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« Reply #36 on: January 09, 2023, 02:11:53 AM »

looks better, but your limp mode is still sneaky,
please add these vars as well:

B_ldr
B_mibeg
miext_w
miges_w
miist_w
misol_w
miszul_w

I did some boost PID tweaking and deactivated SAI, N112 and N249.
Leave the diverter valve straight connected to Manifold.
If you are not sure about proper function, use original dv for trouble-shooting.

@nyet...sometimes you need a little more help to go on ;-)
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LynixGO
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« Reply #37 on: January 09, 2023, 08:32:43 AM »

Hello

I have 3 springs for actuator

Green: 0.4 - 1.0 Bar
Yellow: 0.6 - 1.0 Bar (currently installed)
Blue: 0.9 - 1.3 Bar

Which spring should i use for the actuator

I think the best one is green and replace the current spring?

Let me know

Kind regards
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Leonhard
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« Reply #38 on: January 09, 2023, 09:04:38 AM »

just leave the previous spring setting until you get acceptable boost behaviour,
makes it more easy keeping the same Hardware/settings for now.
In between try my bin, if my guessing is right, the "limp mode" should be gone
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LynixGO
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« Reply #39 on: January 09, 2023, 09:10:39 AM »

just leave the previous spring setting until you get acceptable boost behaviour,
makes it more easy keeping the same Hardware/settings for now.
In between try my bin, if my guessing is right, the "limp mode" should be gone


Thank you for your time,
i will try your bin tomorrow
do you have an explanation why the limp is happening?
i have no idea why the limp is even happening as the boost on high rpm's looks fine.
it only happens at high RPM's if i just WOT and shift before 5000 nothing is wrong
i just feel the car holding boost and the gauge is fluctuating.
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nyet
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« Reply #40 on: January 09, 2023, 09:53:42 AM »

Revert to stock 710N
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Leonhard
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« Reply #41 on: January 09, 2023, 09:58:32 AM »

I'm thinking boost control shuts down (B_ldr=0),
and yes, this might caused by boost deviation/fluctuation.
To get it finally, it's still important to add all the named vars to your log!
But first things first, let's see how the update boost PID is doing.


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nyet
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« Reply #42 on: January 09, 2023, 02:17:24 PM »

I still think there is something wrong with his DV setup that has nothing to do with tune. I'm also not convinced that is what is causing limp, since its the first i've heard of a broken dv causing limp w/o a dtc.

so ya, lets get the PID fixed up and go from there.

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ME7.1 tuning guide
ECUx Plot
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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 #43 on: January 09, 2023, 02:36:00 PM »

I still think there is something wrong with his DV setup that has nothing to do with tune. I'm also not convinced that is what is causing limp, since its the first i've heard of a broken dv causing limp w/o a dtc.

so ya, lets get the PID fixed up and go from there.



Nyet,

i tried 3 different DV's

Original, Aluminium DV, Forge DV, without any succes.

Sad((
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Blazius
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« Reply #44 on: January 09, 2023, 05:18:26 PM »

I suspect you have a compounded issue its gonna be real hard to track it down if you dont start isolating things one by one.
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