i have a problem with my car right (1990 Notch v8, automatic) now and i can't figure it out... when i pull off my oil cap while car is running it just dies. but if i put my hand over where the cap goes i can feel air getting sucked in. any idea's what can cause this?

 

check your PCV

 

any leaking gaskets yet?

 

or mabey one of the valves are stuck open, because they do get gumbed some times, or a pcv hose....i just don't know