Loss of power

[Nandovee]

Afternoon everyone. Not been too active on here as cars been running perfect.

 

However...

 

Today, on motorway. Was trying to overtake and put foot down. Normally I'd fly off with a surge of turbo power. However... Today... Put foot down and nothing. 

 

Have also noticed car taking a wee bit longer to start up.

 

Has been over 1 year since plugs where changed. No dash warning lights 

 

So is my turbo about to die? Or is it the plugs?

 

Answers on a stamped addressed envelope please.

 

Ps just about to plug reader into the ECU and see if any codes have came up

[Nandovee]

Plugged into ECU and getting code PO234 turbocharger/supercharger A overboost condition

[Johnfc2017]

A turbo is a turbine that is driven by exhaust gases from the engine which transfers the power to the air compressor via a rod, which forces more air into the engine and you get a performance boost. There is  a negative feedback loop consisting of an actuator and vanes that open called a wastegate. If the turbine is spinning too fast, then a mechanism called the wastegate regulates the speed by opening vents that allow the exhaust gases to escape away from the turbine, and it slows down, which closes them .

 

That is until the wastegate fails. It's common to fail when there is a buildup of carbon in the wastegate. With no governor to control the turbine speed, it could potentially blow gaskets and seals on the engine if it wasn't for a sensor that monitors the pressure, and when the pressure is too great, it sends a code to the ECU that puts the engine into limp mode, throwing a diagnostic trouble code and giving you a loss of power.

 

This video shows how someone has used Mr Muscle to break up the carbon deposits in the wastegate without removing the turbo from the engine, which is the most common problem with TDi turbos.  If you try this method, it will save you the time removing and dismantling the turbo, and save you buying a new one.

 

Other causes could be the diaphram, vacuum pipe or sensor problem but check the carbon buildup problem first.

 

 

[Nandovee]

Hi. Yeah the problem was a seized wastegate. Now fixed and back to her best self