Hoping for help diagnosing some issues with my car smoking. It only seems to happen when deaccelerating. I noticed that it coincides with when my vacuum is above 20 for more than 5 seconds. It smells of oil so I don’t think it a head gasket. The oil on the stick looks ok. I also checked the radiator and no sign of oil. I am pretty sure it oil smoke. I don’t notice it when under boost or cruising.
The things I have looked at so far, I replaced the PCV valve and added a catch can. I added some stainless screening to the catch can input strainer. The can is working as it did have oil water and yuck. I emptied it and tried another test drive. Still smoking on deaccelerating (example I drop from OD to drive while going down a slight hill). I rechecked the can and it had only a small amount of stuff as it was only a short 10 mile drive.
An ideas on narrow this down or other things to check next
The things I have looked at so far, I replaced the PCV valve and added a catch can. I added some stainless screening to the catch can input strainer. The can is working as it did have oil water and yuck. I emptied it and tried another test drive. Still smoking on deaccelerating (example I drop from OD to drive while going down a slight hill). I rechecked the can and it had only a small amount of stuff as it was only a short 10 mile drive.
An ideas on narrow this down or other things to check next