Hello guys,

I was wondering if anyone could help me with an issue I have with my Fabia MK2 VRS (CTHE) . The car recently started making a rattling noise and it turned out to be a bad water pump, so I got this replaced by someone on a forum who said they've done these before, and they replaced this for me. I also had the thermostat replaced at the same time, as the temp gauge needle was acting strange.

Oh the journey home after having the pump replaced the car drove fine but without boost. The supercharger seemed to work fine.

The coolant hose had popped off the thermostat as it hadn't been clamped on properly, but it has now been secured.

The car has a blow off valve which would normally make a loud hissing sound (normal) after releasing the gas pedal but now it makes a slight hiss when pushing down on the accelerator pedal and makes less of a hiss when releasing the accelerator pedal.

Long story short, the car is now making a hissing noise and a whiney noise with vibration through the engine bay when accelerating, and there doesn't seem to be any boost. It also judders slightly when moving off.

Any help would be much appreciated.

Thanks

Edited 29 April, 20251 yr by wah007

You may have a disconnected/broken vacuum line.

open the bonnet with the engine running and try to find the source of the hissing.

the whining could be one of the pulleys, i would check the tensioners.