sr20det startup 4k idle then rpm climbs

[taritte]

Whats up guys, I've searched and searched but still haven't found an answer. The car is a 1990 s13 with a redtop sr with basic bolt ons. As i was driving i pulled out into traffic (built about 5psi and when i let off the rpm hung around 4k+ rpm. Also I didnt have brake pressure. When in gear and slowing down the vac goes to 0 causing the loss of brake pressure. The problem is when I start the car the rpms shoot straight to 4k then after the rpms just keep going up until I turn the car off. I've checked vac lines and couplers for a leak with no luck. I've also took off the vac line to bov still no change, unplugged maf idles low and dies, unhooked the iacv no change, unhooked tps no change no codes are being thrown and gas pedal/cable isnt hung up.I'm completely stumped I've tried everything that I can think of. I'd really appreciate any ideas or tips, its my dd so its really stressing me out.

Thanks for any input.