1GGTE 3k idle

[low gx]

Was doing some drifting on a stretch of private road and all was good, done a h-brake u-turn, powered out and for no reason started idling at 3000rpm. Throttle assembly is all mint and the engine still behaves perfectly. Engine is gen2 1ggte

[1gjet]

Fubar or dirty iscv.

[Kedderz]

leak in intercooler piping post AFM.

[low gx]

No obvious leaks. Havn't ruled out a blown intake gasket but i dount it's that. Checked bypass valve and isn't jammed. Will remove and clean throttle body but doubt thats the problem, need more advise please