My car is smoking heavily after cold startup. Here is the story, yesterday I was putting my HKS catback and I decided to also take out the extension manifold to fix the screeching sound from the ACV. While removing the ACV it broke in half. I was able to JB wled it and let it cured and I was able to put it back on and I put some sealant on the disk to stop the screeching as per someones advice. I also went ahead and removed the AWS and allof its components. I used blockoff plates and used the resistor. I also removed the double throttle actuator and plates as well as remove the coolant lines from the TB as per robinettte's site. I also installed the HKS cat back. I am using Royal Purple motor oil but have used it for two weeks and had no smoking. This all started after installing the HKS exhaust. It is not a prestone or water smell it is a definite exhaust smell. Any ideas?

 

I believe it is oil. Would removing the PVC vavle have anything to do with it? I still have the secondary route to the turbo with a catch can.

 

Thats just condensation in the cat back. The same thing happened when I put my main cat which has been lying in garage for about a year. Alot of white smoke on startup. Just the other day, I put my stock muffler back on after its been lying around for a year too. Same thing happened. Alot of white smoke, but doesn't smell like coolant. JUst smells dirty (like burning dust or something).