Fabia starts fine but drops RPM and turns off in 5 seconds.

[zoogii]

Hi everyone. I have skoda fabia 2008 mk2, 1.2l. I bought 2 monts ago.

 

now it is starting fine but it is not holding RPM at 0.8. It drops and turns off. 

when i unplug the carburetor plug it holds RPM at 0.8 but RPM is not speeding up.

 

Do you have any idea? what should i check next.

[pearce_jj]

VAGCOM diagnostics error codes

[mrgf]

Injection, not carb!

[Breezy_Pete]

Check the brake servo vacuum hose for cracks at the junctions of the hard plastic hoses.