Hey all so car has been sitting for 6 months replaces engine and all parts before it sat. So go to start it nothing so I jump it it starts bumpy idle cause my exhaust is a mess with holes and makeshift pieces lol so yeah had an exhaust leak I'm secretly hoping this has something to do with all the smoke bad cat or 02 sensor? I wish anyway so when car is started it is a little rough but okay no overheat but as soon ad I go to warm it up boom blue smoke!! Lots of smoke!! Every time i push the throttle smoke when ar idle no smoke only under throttle oil looks good and so does coolant so from my little knowledge sounds like piston rings or valve seals which would mean game over I don't have a compression test or leak down yet so just hoping someone has heard of a jacked up exhaust system being the problem maybe 02 sensor or cat? But I know it could be rings,seals,or even head gasket but car does not overheat!! Oil looks good amd so does coolant so idk ANY help be great thx guys!!

 

Piston rings are fried. I heard it could also be bad valve seals. What i did learn from school is that blue smoke definitely indicates fried piston rings

 

Yes that's what I thought thx for the info