I recently bought a 2003 G35 car had 100,700 miles and when I was driving it the other day the car turned off in the middle of the road and would not turn on. after 10 mins of trying it turned on. I decided to change the spark plugs to ngk Double Platinums I gapped to 0.44 everything went smooth until I started it. The car first had a rough time turning on it didnt turn on the first time, then I got it on the car was idiling so rough and mis firing a lot. I tried everything to switch the coil packs and checked all wires and spark plugs multiple times still cant figure it out. Any help? Im a new at this so please help me out


ran the code runner and It says codes po345 po113 po327

 

P0345 - bank 2 cam sensor, will definitely cause a misfire if sending wrong data.

P0327 - knock sensor low input, usually caused by a faulty sub-harness. Google search it you'll see what I mean.

P0113 - IAT high voltage, it's built into the MAF, replace it.

Better to just look the codes up instead of throwing parts at the car hoping something will fix the problem.

EDIT: The cam sensor failing is probably why it stalled out on you and why it won't run, verify you got the coil packs plugged back in in the correct order though, it's easy to get 2 of them swapped on those earlier model engines before they started putting labels on the harnesses.

Use only Genuine Nissan OEM or Hitachi sensors, the ECM doesn't play nice with any aftermarket brands, Hitachi was the OEM supplier. There are multiple revisions, the latest revision part number ends in "D" and it will have a metal cap on the end of the sensor to prevent oil from contaminating it in the future (at least that's what we HOPE it will do