General Maintenance & Repairs - Help finding intake/vacuum leak

So my car keeps throwing a code p0507 says idles to fast or high. The car does idle kind of high like 1100 rpm it is tuned so I thought it could be the iac valve well I replaced that and it got worse like idling at 2 to 3k I put the old one back in and now I think there is a leak somewhere but I can't find it and the only way I know how is a smoke machine I don't have one and rather not pay someone to do it if someone on here knows a way to find a vacuum leak. Car and mods are in my sig thanks.

Got this from another Post.


A P0507 DTC trouble code may be caused by one or more of the following:

A vacuum leak
Leaking air intake after the throttle body
EGR valve leaking vacuum
A faulty positive crankcase ventilation (PCV) valve
Damaged/failed/dirty throttle body
Failed EVAP system
Failed IAC (idle air controller) or faulty IAC circuit

I like to use brake cleaner or starting fluid. I start the engine and let it run and then carefully spray brake cleaner in leak prone areas. If there is a leak it will suck in the brake cleaner and the rpms will jump