ok guys so listen, i was disconnecting my harness from the coil pack one at a time while my car was running, and the front middle one caused no change in the engine when i removed it, as in the engine didnt rev lower or lose power, so this leads me to belive im not firing on that cylinder. So i take out the spark plugs and the middle one, the one that isnt firing is blackened with oil, other ones look worn normally. SO get new ones, put the front three in and im still not firing on that cylenter, so i took out the coil back and switched it with the one next to it, and again removed the harness, but still nothign from that front middle clyeder, so basically where i am is that its a new spark plug, its not the coil pack, the old spark plug had some oil on it, and im gettin no power from that clyinder. Lay it on me guys

 

Is the connector to the coil pack getting voltage? ie.. hook up a voltmeter and see if you get a signal.

 

maybe a bad injector

 

All those might end also to bad ECU.

Nissan FSM tells to check injectors for click. One way is to use mechanical s***hoscope while idling (eg. long screwdriver on injector, ear on handle) or taking cam sensor off and rotating it with ign on.

 

see if your plug is getting a spark. insert dummy plug, attach plug wire to the faulty plug and hold it against some metal and crank that baby. if it sparks, which it seems like it will since you've swapped out coil pack and plug with the same result, then move on to a compression check and the injector for that cylinder. might want to look into getting a new plug wire for that cylinder also and see if that helps.

 

my money is on an injector.
run a resistance check on the injector to make sure it is within specs.