Oil Cap Off Engine Stalls

The reasons for engine emitting smoke from oil cap.

Oil cap off engine stalls. It will have stalled becuase it will have sucked air onto the inlet system through the oil filler hole this will have messed up the air fuel ratios seeing it will have been sucking in air after the afm so the afm will not have been able to get the mixture right. Engine stalling problems can be hard to find and are often sensor or temperature related. However i have no idea what is. By removing the oil cap you have introduced a large air leak in a closed pcv system.

Some systems are that sensitive bmw for example will do the same thing if tuned properly if there is a problem with the engine it would be that it is running on the lean side. Z4 2007 3 0 si almost 100k km mobil 1 0w 40 no power loss so far no failure codes nothing at all. Remember not to open the cap when the engine is hot. When the fuel bypasses worn.

Just messin around with my car. Also close the tank with the cap when you are done. 2013 mustang 3 7 v6. It means that the fuel system is working as advertised.

Clean up if there is any oil residue. Engine stalling is more likely to occur during cold weather or when starting a cold engine. There could be two possible reasons for smoke coming from oil cap. Hot fuel bypasses worn valve stem seals and rings.