I am installing an engine and it has sat so long since I took the junk one out that I can't remember where one of the hoses goes. At the rear of the engine down into the rats nest area there is a large hose that runs to the air box. Then there is a smaller one right next to it. Where does that one go? Does it go to the top of the engine into the throttle body?

 

Pictures?!?! What year? What model?

MINT 1980 s1=THE CAR I WILL MISS FOREVER! 1988 s4 vert: jdm s5 t2 swap, mild streetport, FD corner seals, RA super seals & springs, tii trans & rear, rtek 1.7, RC 550cc primary, 750cc secondary, FMIC, walbro 255, CS down pipe, RB rev ii down pipe back no cat , koyo rad, broken window switches, and RFL HKS BOV.

 

Can't do pics. On my phone at my shop. The hoses are at firewall under the intake and I know the large one comes to the air box....the other one is smaller and directly next to the larger hose. 1990 s5 na