Guys so this weekend I'm finally going to change my spark plugs in my 2003 Infiniti sedan I've never done it before but i had change spark plug before in other vehicles so can anybody give me any advice or any tips on what should I do or how should I go about it

 

One at a time, hand tools, and take your time.

 

Ok thanks. Just change the spark plugs I'm going to leave the coils I have no misfire so that's why I'm only getting spark plugs

 

I still have original coils after 10 years/154K miles.

Inspect your coils and spark plugs though for any oil on them. You will need new valve covers or think outside the box to fix it.

I changed my valve cover gaskets a couple weeks ago and came across my number 6 tube leaking oil. Not enough to cause a misfire or any performance issues, but enough that I was annoyed. I used a bunch of RTV around the rubber grommet to hopefully plug any leaks. I'll check my results in a couple hundred miles.

 

If coils have oil on them you can replace just the rubber part, look up coil on plug boots. The coil packs are usually fine, it's the rubber that degrades over time.

It's also best to do one at a time. Two of the coil packs have the connectors close to each other and it's easy to plug them in out of order (it's happened before).

 

+1, that would be the #4 and #6 plugs on the driver side. The 2 plugs are identical except for 1 wire having a different color strip. If you switch it, you'll get a P0300 code and it'll run like ****. Don't ask me how I know...

 

Okay thanks man I'll make sure I do it one at a time

 

One at a time, and use dielectric grease on the plug tips.


Reason to don it one at a time is because on two cylinders it is possible to cross the coil wiring and get a misfire that will cause you pull your hair out down the road.

Oh and 172K miles....all original coils (knock on wood)