So my FD is being an FD and being weird. When I do an oil change after a day or so I really bad smoke smoke out of my tail pipe at idle. I
Get no smoke at start up or when moving, but when I'm stuck at a stop light I create a nice smoke screen. My cars only done this one before and it was the same story, a couple days after an oil change. Then it decides to just stop and run clean after a while...any ideas on this???

 

what colour of smoke? .. mine does this too. coolant seals

 

Sounds like you might be overfilling the oil and the excess it making it into the primary turbo and intake causing the smoke until the level comes down to normal.

 

I'm hoping this is what it is. Today I'm going to crack open the drain bolt a little and see if I can lower the level a little to stop the smoking. The only other thing I can figure is maybe the turbo went bad.

 

Remove the filler cap and see if the problem goes away

 

Tried it, still smoking after removing oil cap.

 

The smoke seemed to be stopping so I took the car for a drive. After a few short pulls the car started smoking like a cigar again. A nice blue smoke.

 

Could this be a turbo issue? There's no oil in the in take and I don't see any shaft play left to right, but there is some shaft play in/out

 

Could be the turbo, could also just be the oil feed line needs a restrictor, could also be an incorrectly routed oil return line, could also be that the PCV has failed or is just capped off.....

There are a lot of things is could be.

 

I'll check the pcv valve, as to the restricter on the oil feed line, I heard that it might temporarily fix the smoking issue but it would just be finger in the damn.

 

I don't know who is telling you that, but it is wrong. The FD produces 100+psi of oil pressure, most turbos are rated at 45-60psi.

 

The turbo does have some in/out shaft play

 

Could be a turbo, but more likely an oil injector is stuck open. There is a little check ball in each oil injector and sometimes one can get stuck in an open position. That allows excessive oil to enter a combustion chamber and there you have your blue smoke screen at idle. As you drive away and the engine revs higher, the amount of oil entering the chamber is what the engine needs, so the smoke goes away. The injectors work off vacuum and that is what moves that little check ball up and down allowing more or less oil into the combustion chamber. Ask me how I know? Same symptoms. Replaced the injectors and guess what? No smoke.

 

Was looking for info on oil injectors and it seems its just a check valve. Is this what you were talking about?

 

^^Yup! Exactly. When that check ball is stuck at the top of the injector. The oil flow from the MOP, oil metering pump, is not regulated. Vacuum and ECU work together to control the MOP and its output. Oil flows unrestricted if that little ball sticks at the top of the injector. It doesn't have to be much to cause smoking at idle. I'm not saying for sure that is what it is but that is what it was in my case. I replaced my twins thinking it was a turbo, but I was wrong. If it's not the turbo, and it's not the oil injectors, then it is oil control rings, but that's really rare. It happens, but not common. Oil control Rings require rebuild.

 

Ok as an up date, I guess I started a new thread also in my panic nature when it comes to this car. I replaced the turbo with a new one from BNR. Still having the same problems, I premixed the gas and unplugged the OMP. This lessened the issue but didn't get rid of it entirely. Also, even thought this is a new turbo I'm getting oil coming out of my BOV and when I took the cone filter off of the turbo there's oil collecting there as well. I'm at a loss on this one...