1.8T Overboosting or other issues?

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Topic: 1.8T Overboosting or other issues? (Read 27672 times)

LynixGO

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	1.8T Overboosting or other issues? « on: January 07, 2023, 01:55:23 PM »

Dear Friends.

I have a VW Golf 4 GTI 1.8T
i decided to upgrade the car with K04-001 Hybrid

other parts i upgrade

Intake:

Oversized Tip
80mm Audi S3 MAF
Power Filter
Upgrade Diverter Valve
Front mount intercooler

Turbo --> 51mm piping --> intercooler --> 60mm Piping --> Throttle Body
Upgrade Turbo Actuator

Fuel:
265 LPH Fuel Pump
386CC Injectors also S3
4 Bar Fuel Pressure Regulator

Ignition:
NGK BKR7E
NGK Red-Tops

Tune:

K04 Remap

I put the turbo on the car in June 2022
since day 1 im not able to drive WOT till redline. (This does not happen when holding gas pedal to floor)
it always goes into limp mode after i let lose gas pedal to shift
it only happens around 5200 to 7000 RPM

things i tried:

Checked for intake leaks / boost leaks (used smoke machine)
Changed N75 (Measured 0.31 Ohms)
Changed Actuator to upgaded one
Used different Actuator springs
Changed Intake to oversized tip
Engine oil flush + cleaning pistons
Changed Spark Plugs
Changed Coils (to red tops)
Changed Fuel Injectors
Changed Fuel Pump
Changed MAP sensor
Changed MAF sensor (Upgraded to 80mm Audi S3)
Replaced all exhaust gaskets (Head to manifold) (Manifold to turbo) (Turbo to Downpipe)
Checked Turbo with VideoScope (No damage to intake or exhaust vins) No Shaft Play
Adjusted Timing in tune

Im getting really tired of replacing parts and spending money
i didnt had the chance to drive with fun yet Sad

I hope someone can tell me some more things to try
maybe the tune is the problem?
im out of words and cant seem to get the problem fixed


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I hope you have a nice day! Cheesy

nyet

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	Re: 1.8T Overboosting or other issues? « Reply #1 on: January 07, 2023, 06:47:53 PM »

IMX is too high.

log all of the PID vars as described in the s4wiki

I have no idea what "K04 Remap" means.


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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

_nameless

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	Re: 1.8T Overboosting or other issues? « Reply #2 on: January 07, 2023, 10:13:07 PM »

Quote from: nyet on January 07, 2023, 06:47:53 PM

I have no idea what "K04 Remap" means.

What do you mean? Clearly it is "The K04 Remap".


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Giving your mom a tuneup

Leonhard

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	Re: 1.8T Overboosting or other issues? « Reply #3 on: January 08, 2023, 02:46:26 AM »

post your bin file,
are there fault codes turning up?


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LynixGO

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	Re: 1.8T Overboosting or other issues? « Reply #4 on: January 08, 2023, 03:21:12 AM »

Hello

No fault codes showing up


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Leonhard

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	Re: 1.8T Overboosting or other issues? « Reply #5 on: January 08, 2023, 09:03:50 AM »

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...


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LynixGO

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	Re: 1.8T Overboosting or other issues? « Reply #6 on: January 08, 2023, 09:25:56 AM »

Hello.

Engine is fully stock

i will try your file today and make a new log.

kind regards


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terminator

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	Re: 1.8T Overboosting or other issues? « Reply #7 on: January 08, 2023, 09:37:55 AM »

I think it's because of the turbocharger. The wastegate port is restricted or the turbo wheel is not ok, so reducing the boost in a short time is not possible while the throttle is closing.
If you request less boost everything will be just fine. Or the actuator spring is too tight.


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LynixGO

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	Re: 1.8T Overboosting or other issues? « Reply #8 on: January 08, 2023, 09:49:10 AM »

Quote from: terminator on January 08, 2023, 09:37:55 AM

Hello, i tried different springs in the actuator
The wastegate is opening as should everything is checked mechanically

Kind regards


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terminator

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	Re: 1.8T Overboosting or other issues? « Reply #9 on: January 08, 2023, 10:00:40 AM »

it does, but the wastegate port is too narrow for this configuration.
I claim nothing, but I would install a normal K04.


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LynixGO

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	Re: 1.8T Overboosting or other issues? « Reply #10 on: January 08, 2023, 10:04:09 AM »

Dear Terminator

Alot of other guys i know run this setup / turbo without any problems….
I think my tune is just fucked up and need to start over again.

Kind regards.


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LynixGO

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	Re: 1.8T Overboosting or other issues? « Reply #11 on: January 08, 2023, 10:12:15 AM »

Im also noticing 2 bar spike on my boost gauge…..


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terminator

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	Re: 1.8T Overboosting or other issues? « Reply #12 on: January 08, 2023, 10:16:21 AM »

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


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LynixGO

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	Re: 1.8T Overboosting or other issues? « Reply #13 on: January 08, 2023, 10:33:46 AM »

Quote from: terminator on January 08, 2023, 10:16:21 AM

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

So the diverter valve is not opening enough or spring is to tight inside diverter valve?

Hmmmm


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terminator

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	Re: 1.8T Overboosting or other issues? « Reply #14 on: January 08, 2023, 10:53:52 AM »

I don't think it matters.


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