Looking for the vacuum leak, I did all those things I listed - couldn't solve it.

So, I sprayed a bunch of carb cleaner, trying to pinpoint the leak - nothing, no sign of the carb cleaner entering the engine...

I'll be hooking up an OBDII scanner today to see if it's sensor related. The S13 ECU in my S14 doesn't show any codes...

I'm gonna start checking the exhaust side, specifically the WG. There's a bad leak there, perhaps the EBC/WG/compressor vacuum lines there are going...

Jesse