My GTI-R

Good to hear it passed
High idle could be a number if things.
Vacuum leak or coolant sensor is a couple to check.
Do a fault code check.
What boost presure are you running?

Ill go through the vacuum pipes this evening but i think they're all ok, i was hoping it might be something simple like setting the idle stop screw on the butterflies.

Not sure what boost its running exactly, but it maxed the standard gauge out (i think), pulls really well all through the rev range, no fuel cut or anything so its not over boosting.

The car engine wise is near standard with just bolt on mods,

Turbo back exhaust
K&n filter
Forge adjustable recirculating dump valve

So its been a while but here's a little update,

My high idle was due to the tps not connected and i only noticed this when i was doing something else and had to remove the intercooler, so that was good.

I nearly sold it to fund an rx7 but came to my senses and decided to keep it but still bought an rx7 ????

Went on a track day down pembrey and it performed absolutely faultless and was one hell of a blast and havent had any issues since, so im well chuffed with it.

That tps is a really easy thing forget to plug in. Glad you came to your senses aswell