So, for the last week or so my cars has started dieing while driving. First time it died randomly when approaching stop signs a couple years ago. Now it seems to have progressed and dies while on the highway and now has become more frequent to date. I checked for vacuum leak and spraying all visible lines that I could see from engine bay. Engine codes…the array of engine codes. P0420 catalyst system efficiency, P0706 trans solenoid ‘C’ clutch, and P0430 another catalyst system inefficiency to join it’s brother P0420. The car starts up fine in the morning. Car does not ride rough.
Today I changed the spark plugs and noticed oil in all 4 wells and a lot of oil in the 3rd one. I changed the spark plugs because they were 20k miles and figured I might as well replace them while I’m diagnosing the car. So turned back on the car after doing the job and got a puff of smoke…go to o’reillys and new codes. P108(MAP Pressure Circuit High Input), P110(Something about coolant being high input) and still the P0420. (Shop I took it to must have removed old codes. Not sure why).
So there shouldn’t be oil in the wells because my shop did head gasket job 2 years ago. I’m pretty confident in their work, so I’m thinking it must be blowby and because the amount of oil in all 4 wells. (But then again this is the cars second head gasket job, so who knows) If it is indeed the rings causing blow by, is it safe to drive around with oil in the wells? If I drain it regularly can I continue to drive it safely? Is there a test to determine if it’s blowby?
I ran car for oil cap off looking for smoke, nothing. I did feel a steady stream of air though, not sure what’s normal and abnormal on that front.
Thanks, I know this is a lot but it’s somewhat intermittent issue. Took it shop yesterday and they couldn’t figure it out.