My Scirocco has become weak in power

[BenJaii]

My Scirocco has become weak in power
A few days ago, after starting my Scirocco 1.4 TSI, I found that the acceleration has become weak, the fuel consumption has greatly increased, and the turbo pressure is abnormal. When I floor the accelerator to accelerate, the factory turbo pressure gauge shows it reaches 2.0 bar. What could be the reason for this?

Here is the video of turbo pressure gauge
https://youtube.com/shorts/RDzm-nax6Eg ... uPFnc7uXli

[Cuprabob]

First thing to do is to scan using VCDS or similar to see what fault codes, if any, are stored.

[BenJaii]

First thing to do is to scan using VCDS or similar to see what fault codes, if any, are stored.

I have not VCDS but I have another to scan in my phone.
It shown no fault code.

[bigkris06]

As Bob says you are going to need VCDS or something similar. Basic OBD code readers may be missing the information you need.

[BenJaii]

As Bob says you are going to need VCDS or something similar. Basic OBD code readers may be missing the information you need.

My OBD can check OBD-II, is it similar? I am going to buy VCDS, what I need to check in VCDS?

[bigkris06]

VCDS is one of the best tools to diagnose any VAG based vehicle. Basic dongles that connect to you phone lack the ability to do anything but basic diagnostics.
If you aren’t getting any codes this may because your tool isn’t up to the job. If it is and you aren’t getting any codes you are going to need to start looking at other methods such as live data etc which I’m assuming your tool can’t do.

[BenJaii]

VCDS is one of the best tools to diagnose any VAG based vehicle. Basic dongles that connect to you phone lack the ability to do anything but basic diagnostics.
If you aren’t getting any codes this may because your tool isn’t up to the job. If it is and you aren’t getting any codes you are going to need to start looking at other methods such as live data etc which I’m assuming your tool can’t do.

I can get over 400 nos of live data from engine on my OBD, but I don’t know the correct values of all my sensor to identify what problem of my car

[cl243]

I had the same problem with my scirocco r i deleted the pcv valve and gained all my power back have a look to see if its the pcv valve.

[BenJaii]

I had the same problem with my scirocco r i deleted the pcv valve and gained all my power back have a look to see if its the pcv valve.

How can I check my PCV valve is working properly?
Or how can I deleted the PCV valve?

[bigkris06]

Does the 1.4 have PCV Valve?

[BenJaii]

Does the 1.4 have PCV Valve?

I found this one way valve is not working properly and I change it. But didn’t solve my problem, only feel more smooth when the gear change from 1 to 2.

[BenJaii]

Does the 1.4 have PCV Valve?

I found this one way valve is not working properly and I change it. But didn’t solve my problem, only feel more smooth when the gear change from 1 to 2.

[cl243]

One way to check the pcv valve. While the engine is running remove the oil filler cap. You should feel suction while lifting the cap off if the cap comes off without feeling suction then you know you pcv valve has failed.

[BenJaii]

I changed PCV valve, waste gate solenoid.
But it’s still no power when accelerating