kilolima

Im not sure if this is in the right section. If not can you point me there. My 4 runner has been running quite rough, and burning through a lot of oil the past few weeks. if I open the hood while the engine is running and i give it some juice, i notice a lot of smoke come out of the intake plenum area on the passenger side. anyone have any insight on to what is going on.

it also has a VERY low oil pressure, and after start up it idles at about 500rpm. and my fuel milage has gone for the s too! about 100km less than usual!

thanks you