I changed plugs, valve cover gaskets, PVC and coils on my RX300. Now after sitting over night it smokes
out exhaust when first started. It doesn’t rest of
the day. Seems strange as it did not do this before the work that was done. Any thoughts?

 

Maybe the PCV valve you used is poor quality? You sure it didn't smoke on startup before the work? Your valve stem seals might be worn out, a common problem. How many miles?

 

155,600 miles Got PVC at O’Reillys. Wasn’t smoking before. Fuel mileage went way up and it runs great. Just smokes on first start after sitting overnight. Like valve seals would, but 100% sure didn’t do it before.

 

Not good.

 

It's not just condensate burning off in the morning?

 

Color of smoke was net mentioned. With cool nights it can be moisture that gets out as steam.

Salim

 

It’s gray oil smoke. You can smell it too.