Hey everyone, I've been trying to chase a problem with white smoke from my d16z6 on decel, it has a decent amount too, i replaced the entire head, all injectors, head gasket, and all sensors that have to do with the head, I'm not burning coolant either, my next option was put the pcv system to a catch can, other than that I'm out of ideas to solve the problem

 

What does inspection of all 4 spark plugs tell you?

 

A catch can is a good idea regardless. I suggest the setups that still retain the stock pcv valve rather than venting to atmosphere. You can find mishimoto clones on ebay in the 20$ range that even have the bronze filter. Then just run a line from the baffle box on the back of the block (above oil filter) to your catch can in. The catch can out line goes to bottom of the pcv valve and the other end of pcv valve goes back into the intake manifold.

You can replace the valve cover pcv port line with a breather if you want aswell. Ive read it does blow out oil vapor but only at WOT, otherwise its the inlet. So the stock setup on the intake tube is fine aswell some say better.