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Author Topic: Boost Problem, no n75 reaction  (Read 1208 times)
kacperoooni
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« on: June 29, 2019, 12:56:44 PM »

Hi guys,

Today I tried to calibrate boost pid with k03-k04-064 hybrid turbo. I set CWMDAPP to 8 and KFLDRAPP to 10 20 30 etc. DC, but I get no reaction. I see set DC during logging but boost seems to be the same on 0% and even 95% DC(like 0.7-0.8bar). The clicking noise from n75 can be heard too(so it works). Leak test done, vcds showed P1200(n239 malfuction) which I've already fixed, n75 checked. If I disconnect n75 from actuator, turbo boosts about 1.2 bar so WG should be OK. I logged with me7logger but I dont have logs anymore, but as far as I remember: Throttle angle 100%, Overboost condition 0, stft ~4%, knock 0 degree.  I run out of ideas now. Does anybody came across similiar problem?
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fukenbroken
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« Reply #1 on: June 29, 2019, 02:10:04 PM »

wrong n75 connection
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kacperoooni
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« Reply #2 on: June 29, 2019, 02:26:58 PM »

Unfortunately, n75 connection is correct :/
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fukenbroken
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« Reply #3 on: June 29, 2019, 02:38:27 PM »

try another n75 then
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kacperoooni
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« Reply #4 on: June 29, 2019, 02:49:52 PM »

3 n75's tried, still the same problem
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fukenbroken
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« Reply #5 on: June 29, 2019, 03:51:19 PM »

wrong n75 connection  Cheesy
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BlackT
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« Reply #6 on: June 29, 2019, 11:39:50 PM »

Post your log, and if I understand you correctly, you say have 0.8 bar boost at 0% WDC?
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prj
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« Reply #7 on: June 30, 2019, 03:58:07 AM »

Mechanical problem, if you disconnect hose from actuator it should go to 2 bar+, not just 1.2 bar.
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kacperoooni
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« Reply #8 on: June 30, 2019, 02:12:50 PM »

well i let the gas after it went 1.2 bar because of afraid of damaging it, n75 is connected correctly. WG actuator crack pressure is 0.6 bar, no leaks, all hoses clean, no holdups inside. I really dont know what is happening. this actuator breaks laws of physics.. Car now is like 300kms away from me (paint job Tongue) so I can't log it now.
« Last Edit: June 30, 2019, 02:19:54 PM by kacperoooni » Logged
BlackT
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« Reply #9 on: June 30, 2019, 02:31:52 PM »

You have 0.8 bar boost when your WDC is 0%?
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kacperoooni
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« Reply #10 on: June 30, 2019, 06:05:45 PM »

Yes, rapp 0 dc or n75 plug disconnected, then it boosts 0.7-0.8 bar. With rapp set to 80 or even 95% its still the same boost like with 0dc. Oh, I forgot. It"s 1.8t AWU new beetle with ecu 032hj flashed with 032bj.
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nyet
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« Reply #11 on: June 30, 2019, 06:12:09 PM »

Your wg is stuck wide open or you have a massive intake restriction

What about wg line physically disconnected?
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BlackT
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« Reply #12 on: June 30, 2019, 11:40:14 PM »

Hi guys,

Today I tried to calibrate boost pid with k03-k04-064 hybrid turbo. I set CWMDAPP to 8 and KFLDRAPP to 10 20 30 etc. DC, but I get no reaction. I see set DC during logging but boost seems to be the same on 0% and even 95% DC(like 0.7-0.8bar). The clicking noise from n75 can be heard too(so it works). Leak test done, vcds showed P1200(n239 malfuction) which I've already fixed, n75 checked. If I disconnect n75 from actuator, turbo boosts about 1.2 bar so WG should be OK. I logged with me7logger but I dont have logs anymore, but as far as I remember: Throttle angle 100%, Overboost condition 0, stft ~4%, knock 0 degree.  I run out of ideas now. Does anybody came across similiar problem?
How you can hear clickin noise on N75?  During engine running, or you test it with vcds?
In normal operation, even on dyno with hood wide open I don't think you can hear when N75 is clicking.
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kacperoooni
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« Reply #13 on: July 01, 2019, 07:04:25 AM »

Your wg is stuck wide open or you have a massive intake restriction

What about wg line physically disconnected?
With WG line disconnected turbo starts boosting normally (i think, sounds like starting jet Tongue), but I'm afraid of breaking it so when I got 1.2 bar I let the pedal. Intake is 2,75" with 550x140x65 fmic (isn't that too short?). When I get the car back I will take dp off and check wastegate tightness.

How you can hear clickin noise on N75?  During engine running, or you test it with vcds?
In normal operation, even on dyno with hood wide open I don't think you can hear when N75 is clicking.

With RAPP set to 80%, also with 0% PED, you can hear clicking even on idle. Also in new beetle n75 is almost behind your steering wheel.
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k0mpresd
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« Reply #14 on: July 01, 2019, 08:47:47 AM »

oh, well, thats the problem. its a beetle. bin it and start over with something not a beetle.
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