When I put my anylyzer on the codes come back "crankcase pressure", "sensor circuit" I have a problem of a rough start, but only once in a while. It will stall at times, but immediately can be started right back up without any problem and will then run smoothly. I'm not sure what "crankcase pressure " even means. Anyone have a suggestion or better yet an answer?

 

What engine do you have?
What is the code?

 

1.5L and I just ran the system again and now it says Cyl 3 misfire. Maybe I need new plugs. I have 67,000 and have never had them changed.

 

Do a tune up using Motorcraft spark plugs and clear the code to see if it comes out. Other suggestions if the code comes back but don't want to go crazy yet.

 

Check and see if you are losing coolant, if so you might have a coolant leaking into the cylinder. Is so go to dealer and have them diagnose for coolant consumption.