Oil burn cloud on engine deceleration

WSUTARD said

OK, lets play detective. The smoking started only once I put the PCV system in. Had it been a bad hone job I would have seen evidence of this earlier. (I have owned the vehicle for over a year now and I drive it as much as I can).

Another "clue" to think about. I had the carb "tuned" by a local carb shop at just about the same time I put in the PCV system. I'm not sure what they did to the carb.

How fast does it take fuel to wipe out rings?

Click to expand...

IMHO, it takes a lot of fuel and time to wash the oil off the cylinder wall and take the rings out.

I guess it's possible if the tune up was bad, you could have had some detonation and lifted a ring land. Or, if the PCV valve did pull some oil into the chambers...that's the quickest way I know to knock 10-12% right off the top of HP, and lift the ring lands.

My best guess is it's a ring/piston issue. I've seen guys running a plug too hot for what they were doing, backside a piston and lose ring seal.
There's quite a few ways to kill ring seal.