P0301 Nissan -

Question

How do i check for intake leaks
Im also getting two codes for my swirl control are these related and wich problem should b e checked first

Answer 1

for P0301 is you have not replaced the spark plugs as a service. I suggest you start by replacing them with the orginal NGK spark plugs.

if you still have the misfire code swap the cylinder 1 and 2 ignition coil and see if the code changed to the other cylinder. if it does replace the ignition coil.

for the swirl control valve check to see if there are any broken or cracked hoses

it is located under the throttle body of the engine 

see picture below