1.8T Cutting boost at 5000 RPM?

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Topic: 1.8T Cutting boost at 5000 RPM? (Read 2381 times)

LynixGO

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	1.8T Cutting boost at 5000 RPM? « on: July 24, 2022, 04:33:12 AM »

Hello guys,

I have a problem.

i have a golf 4 gti 1.8t
i installed a K04 Turbo 3 days ago
i always ran k03s without any problems
after the k04 install the car massively cuts boost at 5000 / 5200 rpm ish
i have full 3 inch exhaust 4 bar fpr 265 lph fuel pump 386cc injectors
silicone intake tip SAI + N249 + N112 Delete
upgrade DV
im running a stage 2 file 225 HP

as i said the car always ran fine with K03S

can someone please tell me what is happening
please see log below and ecu file below


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LynixGO

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	Re: 1.8T Cutting boost at 5000 RPM? « Reply #1 on: July 24, 2022, 04:41:12 AM »

File is

06A906032LP


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Norwegian1.8T

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	Re: 1.8T Cutting boost at 5000 RPM? « Reply #2 on: July 24, 2022, 07:45:16 AM »

You upgraded to a K04 and is surprised that it boosts more than it is tuned for now?
You need to redo IRL/IOP aswell as IMX. Your ECU sees massive overboost so it tries to get it under control again.

Did you even bother to look at the log you made before posting it here Tongue

Also you'r boosting past your MAP sensor which is never a good idea


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LynixGO

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	Re: 1.8T Cutting boost at 5000 RPM? « Reply #3 on: July 24, 2022, 07:59:51 AM »

Hello

Thank you for your response
I dont tune myself and i have no idea what im looking at or log exactly
So you say that i need a 4 bar map sensor and a new tune?
If thats the problem i can stop trying to replace sensor
Also the turbo is fluttering very loud while this wasnt the case with k03s

Kind regards


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nyet

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	Re: 1.8T Cutting boost at 5000 RPM? « Reply #4 on: July 24, 2022, 10:56:21 PM »

no, he's saying don't boost past your MAP sensor, not get a new MAP sensor.

also put your gd n249 back.

Quote

upgrade DV

So uh, why the n249 delete?

yes, you need a new tune or you are literally going to break something.

No idea why you thought it would be a good idea to start swapping hardware with absolutely no idea the stock ecu wouldn't work correctly.


« Last Edit: July 24, 2022, 10:59:17 PM by nyet »	Logged

ME7.1 tuning guide
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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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	Re: 1.8T Cutting boost at 5000 RPM? « Reply #5 on: July 25, 2022, 02:13:17 AM »

Hello Nyet,

The turbo seller told me its a 1 on 1 swap and a tune is not really needed
thats why i bought the turbo.
clearly im not an expert on tuning
sorry for that
i have the N249 plugged in without any lines connected to it
i deleted the N249 because my car was really not boosting anymore above 200 km/h
with this delete the car ran way better then it ever had before
my friend also swapped his k03s for k04 without any problems
so i thought it was possible.
i wont drive the car now till i get it tuned.
thank you for your information
really appreciated

kind regards.


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Norwegian1.8T

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	Re: 1.8T Cutting boost at 5000 RPM? « Reply #6 on: July 25, 2022, 09:11:01 AM »

Yes get a new tune, preferably do a 5120 hack so you can get a 4 bar MAP.


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nyet

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	Re: 1.8T Cutting boost at 5000 RPM? « Reply #7 on: July 25, 2022, 10:04:19 AM »

Its a 1:1 swap (usually) if you have a stock tune.


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LynixGO

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	Re: 1.8T Cutting boost at 5000 RPM? « Reply #8 on: August 12, 2022, 10:18:21 AM »

Problem solved,

The intake tip was collapsing therefore cutting boost and going limp mode
still need a tune tough

kind regards.


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nyet

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	Re: 1.8T Cutting boost at 5000 RPM? « Reply #9 on: August 12, 2022, 02:31:13 PM »

Quote from: LynixGO on August 12, 2022, 10:18:21 AM

Problem solved,

The intake tip was collapsing therefore cutting boost and going limp mode
still need a tune tough

kind regards.

Thanks for following up. It is very helpful to others.

Also, yes, this is a common problem; apologies for not suggesting it.


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_nameless

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	Re: 1.8T Cutting boost at 5000 RPM? « Reply #10 on: August 12, 2022, 04:33:24 PM »

Quote from: LynixGO on August 12, 2022, 10:18:21 AM

Problem solved,

The intake tip was collapsing therefore cutting boost and going limp mode
still need a tune tough

kind regards.

Good find, was actually about to suggest that.


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Giving your mom a tuneup

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