2007 Xterra 6MT
So I had just bought this nice 07 manual Xterra and it came with a SES light on. When I took it to get an oil change and check up, it came out that it has a misfire, and i could feel it at start up at times. So I was told it was most likely a Spark plug issue, so went ahead and ordered them up as well as the head gasket and throttle rings or whatever they're called. Went over to my friends shop and he let me work on it while he over looked as he worked. I was following the first guide on Youtube. Every thing went well, surprisingly. I changed out all 6 spark plugs which where really burned and installed the new ones and did like the video said which was to hand tighten then half tighten with the wrench until you feel the washer crush. I did put the aluminum protector or whatever on the aluminum part and that weird white stuff on the coils. Installed everything back to how it was, but i didn't have the torque wrench for the weight on the 8 bolts, so when i started it back up it was shaking a little. Went and got the wrench i needed, tightened them down to 11lb/ft and then the shaking for the most part stopped. So now everything except the cover was back on and ready to goWe erased the SES code or whatever and the light went away. HORRAY!!.....not so fast. Upon accelerating a little the SES light came back on and when we ran the test, now it says multiple (4) misfires. We're hoping its the coils which I ordered and should be here in 2 days. He says that it might be the fuel injectors, but honestly idk, I'm not a car guy but I'm willing to learn for this Xterra. Like I said I pretty much did the job myself and all went well but now we think the coils might be bad or I did something wrong, but unless the guide was bad i followed it as well as I could have. I forgot to get the codes but i can try at some point later tomorrow or Tuesday. Right now I'm working like 60hr weeks so it's a little hard to get time to work on her and with the covid stuff, mechanics have like 3 week wait times for appointments, but i can set aside a few hours to change these myself. If need be I can record what i'm doing. But yeah if anybody can help me out with this, it was be so much appreciated.