Sponsored

Issue with white smoke out exhaust

NFamous60

Well-Known Member
First Name
Jau
Joined
Sep 19, 2022
Threads
20
Messages
415
Reaction score
369
Location
Tacoma Washington
Car(s)
2022 Supra 3.0 Premium, 2016 zx10 fully built
White smoke at idle usually means insufficient crank case evacuation. Either because the car has a deficient PCV system from the factory, or the owner has made modifications to the PCV system that eliminate one or more vacuum sources on the case when there's nothing coming from the throttle.

Smoking under throttle typically means poor oil drainage from turbo and oil is pushing past seals, blown turbo seals altogether, or blown HG. The PCV system is still suspect here as well, but less so.
believe I may be victim of both of those. So rn I have the klm breather oil cap on a Y fitting with the pcv hose. Going into my radium catch can. Thinking rite the other end of the catch can to the port on the front of the intake manifold. Or do you have another suggestion. Also my CCV runs to a separate can that I have setup has a drain back. I was under the impression that because of the valvetronic system we Dnt make much vacuum.

far as the turbo seals. I have a EFR which by Borg Warner they are unserviceable. Contemplating replacing supercore or new turbo
Sponsored

 

buffmkv

Member
First Name
Sto
Joined
Dec 13, 2025
Threads
1
Messages
10
Reaction score
0
Location
Orlando, Fl
Car(s)
2021 mkv supra
I ended up getting an oil cap breather and ran a line from the catch can back to the intake plenum with a VTT one way check valve. It'll pull the vapor under vacuum/idle and under boost keep the check valve closed allowing the PCV system to vent as needed through the catch can breather and oil cap breather. Have not had a single issue or bit of smoke ever since.
SUPRA PCV.jpg
Do you have a part number or know where I can get that part that is circled?
 
 








Top