ok. i have wiring that is on the left of head, kinda near the pcv valve and hose, like right next to where the radiator hose connects to the intake i believe and there is a plug on it.

everytime i wiggle this wiring and plug, it seems to misfire. can somebody help me and tell me why its misfiring and what the plug is for? thanks

 

thats your coolant temp sensor plug. nissans NEED to have this plug perfect!

 

hey durdan, so do you think it could be the sensor itself, or the wiring behind it?