FlexibleMouse

Suspect diverter valve maybe? Or the wiring to it

Same as before, big improvement over 205/40/17's. Dry grip is as good as any other high performance tyre, and they really are good in the wet. We've had some torrential downpours here and I have found that I don't alter my driving in the wet anymore.

Uniroyal Rainsport 3's in 215/40/17

Sure, I will put up a pic later

According to my OBD reader I get 100% engine load at about 75% throttle position.

I considered 205/45/17 too but wanted the extra width, the wet grip was abysmal on the old tyres. I figured if they put 215 width on the polo gti then they would be a good choice for the fabia too.

Yes, and is made a significant difference to the noise and harshness. The Rainsport 3's really do stick well, wet or dry.

Sounds like you have a boost leak, and it's most likely going to be the diverter valve at fault. It's at the front of the engine mounted to the compressor housing of the turbo. Does anyone know if the valves on these cars have the rubber diaphragm? I assume they are the later piston type but haven't needed to remove mine yet.

I've just had a full set of Rainsport 3's on my vRS, I went for 215/40/17 and am very happy. Reduced the harshness and noise a little too which is welcome.

You can add the custom pid lists specific to other manufacturers and see if you get lucky, but it looks like your car might not have an oil temp sensor.

When you have the car connected and the app open, if you go to add a display you will be able to see the pid's the car supports (in green). Provided the oil temp is on the list, just add the display to the screen. I have custom pid's for power and torque (from airflow) which is of no use on my VRS.