Does loose oil cap affect rpm driving and idling
would a loose oil cap do this? mine does it while
driving and idling. And if so how long until it goes
back to normal once i tighten it?
Also oil pressure light was coming on which is how i noticed all of this.
A loose oil cap will cause a vacuum leak. It should go back to normal immediately.
Check your oil level!
Immediately or like 5 to 10 minutes of idle and or driving?