So to start off I had this post in the wrong channel so I moved it here. Long story short I had dropped my Z off at a autobody shop to get a polyurethane Nismo V2 front bumper installed (got it for the durability) and when I went to go pick it up after it had been at the shop for 24 hours and had been sitting all day the next day, went to start it and my engine started knocking I sat there confused and it started to run normal after it had warmed up, I got to a intersection and all of the sudden my "Check Engine Soon" light started flashing followed by my V6 turning into a V5 when I got back to my house I ran a engine scan and it came back as cylinder 3 was misfiring so been fixing that