Leon Cupra R STFT Issues

[AceD909]

LCR 1.8T BAM
Hello, I have issues with STFT,
I have changed all vacuum hoses, TIP, stock DV, everything is good.
MAF and LAMDA are reading properly, even with MAF unplugged I have the same +25 STFT.

When I start the car STFT is 25%, doing misfires, after some time on idle it will settle down.

Another fault code i get even on idle is

17705 / P1297 / 004759 – Pressure Drop between Turbo and Throttle Valve (check D.V.!).​

When I remove the hose from the PCV that goes to the intake and install a new hose on the intake with a plug to seal the leak, the STFT is around -10%, and there is no fault code 17705 / P1297 / 004759 – Pressure Drop between Turbo and Throttle Valve (check D.V.!).


When I reconnect it as it should be and press the hose from the PCV to the intake with pliers, the STFT starts to drop.
I did suction pump delete, if needed i can get new one and put it all together.

Could all this be problem of PCV Bleeder Valve?
If PCV is bad, suggest replacement parts, i will try to get OEM tomorrow.

Thank you in advance.

 

[mty12345]

Whats the LTFT?
What's the short trims doing when driving?

 

[AceD909]

Whats the LTFT?
What's the short trims doing when driving?

Short trims are jumping around, going up to 20% and -10%.
LTFT was around 4.8%, but didn't check after the hose from charge pipe to n75 was replaced.

I don't have any boost right now, 0.3bar is max.
When the hose from charge pipe to n75 was leaking, I would get P1297 fault code and limp mode randomly, but the car was overboosting and fluctuating.
Now with hose replaced I can't even try.

I can check for STFT and LTFT in couple hours and will post the results
I have access to ME7LOGGER, just give me list

 

[mty12345]

I'd smoke test it to try and sort the boost issue, then see what happens. No point worrying about STFT etc until you have that sorted.

 

[AceD909]

I'd smoke test it to try and sort the boost issue, then see what happens. No point worrying about STFT etc until you have that sorted.

I Work on my car right now, i disconnected pcv and put new hose to intake with bolt to stop leak, boost is very good, no P1297 code.
I did couple of times with smoke test, there is no leak, if I build more pressure smoke comes out of dipstick

 

[mty12345]

In that case i would definitely try replacing the PCV valve.