Do yourself a favor and check the hoses. The opti is going to crap out before long. So when it needs replaced. Buy one off the partsladi off ebay. Take the cap off and put loctite on the rotor screws. Put it back together and run silicone around the cap and housing. Then spray away...

For future reference. As for your smoke Check the radiator hoses and the oil cooler bypass one. Probably that or you might have forgot to close the bleeders. As for the oil leak.

Like you said it is probably the rear of the intake which is a easy fix. That or the rear main seal. That is if it is leaking back there.

 

after hooking up a scanner to the car, its an o2 sensor. it runs rough up high though so it probably still needs the whole opti and plugs. were and what to i have to do to get new o2 sensors in?

 

not hard to change. there on the exhaust under the car. lol. unfortunately i think u have two cats so in that case theres four of em. two before the cats, (one on each side) and two after the cats. so did the scan tell u which one?

 

O2 Sensor Heater Circuit Malfunction Bank 2 Sensor 1


this is precat. ill double check before i replace them.