Most common place for boost leaks

[gregorcupra]

Ive been under the bonnet for a couple of hours now , and had the bumper off checking the intercooler piping etc. My car only boosts to 5psi when it used to boost to 12.

I want to upgrade a few parts on the car (fmic, sports cat etc) but I am not going to attempt it untill I can get to the bottom of this ongoing problem!

Where are the most common areas for boost leaks on the ibiza cupra ? And I have already used the search function , to no avail

 

[MIkey kc]

there isnt a commen place really for a boost leak! have you tried a maf sensor?

 

[gregorcupra]

I disconnected the MAF the other night. The car idled the same but when I took it for a drive it stalled whenever I stopped at a junction , so I guess its working fine ?