Yesterday, I had a p0303 code which is a #3 cylinder misfire which I've never had before. I'm thinking that I'll replace the #3 sparkplug and maybe that spark plug wire as well. My Bosch coil packs are about a year old so I doubt that's the issue at this point.

Is there a torque value for spark plugs or just "tight enough"? Also, do I need a bit of anti-seize on the top of he thread base? I'm installing new E3 plugs which is the brand that that I've used successfully for almost 80k miles.

Thank you.

 

RAVE says 18 lb.ft (page 18-2-79).

 

I always put a very thin layer on the threads, need to be careful not to any on the plug itself.
I would say it is important to torque them, or otherwise make sure they are tight.

Strangely, I had a lose plug on my 911, which made a tiny, rattling sound. It turns out that is not an uncommon thing if plugs on those engines are not torqued correctly.

 

E3 said that their plugs don't require anti-seize.

Turns out that my #3 plug wire had been heated/burned just above the plug connector even though I had a nomex protective sleeve over it. That heat stiffened the wire insulation and it finally broke through last evening. I think that it was too close to the SAI piping going into the heads.

I changed the wire but not the plug for now. Runs fine. Next service will get all plugs/wires changed. BTW, the wires were 5 years old and I meant to change them at the last service but obviously didn't.