I have a MY97 STI

Recently I have been getting some idle issues

It stated by being a bit low while cold. Now it is getting worse and on the way home today stalled twice. Soon as I turn the key again it started up and was fine

Got it home, the car was left on and ran fine

The car has been modified to 320bhp. It has an alcatek ecu and the MAF has been bypassed

The temp gauge on the dash doesn't seem to be going up at all and the car has a baileys dump valve but I never hear it go off

I'm in Aberdeen, hopefully will not be too much of an issue. Is there anyone known mechanic around this area who can have a good look at it for me?

 

No one have any thoughts on the above problem

 

Could be a split vacuum hose somewhere mate, have a good look around them. That's maybe why the dv isn't working. Also if there's too much air being drawn in at idle the car will stall. Might even be larger boost pipe has come off.