Guys I need help plz. My 03 G35 service engine light came on the other day and car lost a lot of power and started shaking a little bit. Took it to a shop and they told me cylinder 6 fuel injector was bad. I then took it to AutoZone to run codes they said it's the #6 coil pack, then took it to advanced they said the same thing auto zone said when they ran codes. I do not know a lot about fixing cars. Where do I begin to find out EXACTLY what's wrong and do I take it to a shop to get fixed or get a friend and He and I replace the spark plugs and #6 coil pack? Of course I'd rather do this myself so I'll save a lot of money but I don't want to **** my car up considering I've never done this before. I've watched a lot of DIY videos and it seems pretty simple. Please help me. Where do I find a good Coil pack? Anyone know how to find the EXACT part number. I need to get this fixed ASAP.

 

There u go. Just watch the youtube video and do the same thing. Its not that hard.


Also, a bad coil is more likely than a bad injector. And dont keep driving the car with a misfire. U will mess up your catalytic converter like I did

 

Exactly what code, if it's P0306 that has nothing to do with the fuel injector, you can test the coil pack by just swapping it with another coil pack to see if the code moves to another cylinder.

If the spark plugs have more than 70k miles on them they probably all need to be replaced regardless.