What a night...
 

So my Kid (who now has my rig) blew the rear end in it last night.

So thinking if he removed the rear driveshaft he would see if he could drive it home in 4WD with just the front end engaged. Obviously didn't work as the rear would lock up so he called for a tow.

He called me for a ride back and while the truck was being towed (rear end on a dolly with the front wheels on the road travellin backwards and in the dark) we noticed that it looked like there was some light smoke or something coming out of the snorkle. We flashed our lights at the tow truck driver and pulled him over to take a look but didn't notice anything wrong. I stuck my head in the cab and I seen that the 4Runner was still in 4-HI so i put it in neutral and carried on to the shop. This tow took about 10 minutes. I suspect that the engine was spinning backwards at about 30 MPH for around 5 minutes.

So the next issue, besides the busted rear end, is the truck wouldn't stay running. We noticed that there were 3 vacuum hoses that popped off. 1 to the TB, 1 to the EVAC box thing, and I can't remember where the other one went. There was oil on top of the EVAC box too where the hose had come off. We pulled the TB out and cleaned it as well as the IAC. and now it idles fine. There was a lot of dry soot like residue in the IAC an TB.

Anyway, the problem now is that the throttle is really stiff but only when the truck is running. When it's off it feels fine. Opens and closes fine. When it's running and he blips the throttle, it stays at about 3000 RPM. I can force it closed by hand but it won't close by itself.

Anyone have any idea why this is happening or what to check next? Thanks!