Andrew B

Hey all just wondering if you could help before I take it to the dealership. First the engine started stumbling a bit and threw random cylinder misfire code. Then I cleared it with my tool and it ran fine for a few weeks then now p0302 cylinder 2 misfire is coming up but it's running close to fine.

the car has 230k kilometers on it and never had plugs changed. I was thinking of bringing it to the dealer for plugs and to change the coil out for a front coil incase it was bad I could narrow the problem coil down without having to take the intake off again. Or I might have a leaky valve cover gasket leaking in the coil.

any thoughts?
thanks

04maximas

change all 6 spark plugs with denso iridium spark plugs and number 2 coil. ya will have to remove the upper intaker manifold plenum for 1, 3, and 5. number 2 is closest to the passanger side on radiator side of engine

Andrew B

oh I thought it was firewall side of engine, whoops. Should I get them to test the coil or swap it with a different cylinder to check if it's the coil or just replace?

04maximas

Ya can swap it with the coil next to it, number 4 but ya still need to do all 6 plugs