Here's how I fixed my cylinder misfire. I changed the crankshaft position sensor that hooked up to the transmission and the spark plug for cylinder 3 that only had 4,000 miles on it which was double plat ngk. One year ago I had a cylinder 5 misfire code and it wouldn't go away and I changed the crankshaft sensor on the tranny and it was gone. The misfire only occurred when changing gears and at highway speeds but not at idle and I even changed the maf and that didn't help and the coils were all oem Nissan brand new from about 5,000 miles ago. So the conclusion here is that its not always a bad coil, maf or etc. it could be tiny little things like the crankshaft sensor or a spark plug that could be new but still bad some how. Since the crankshaft sensor is responsible for engine timing, the driver may experience engine backfire or irregular rpm function, if the vehicle starts at all.

Read more: http://www.ehow.com/about_5860665_ba...#ixzz2zTIZR81N

 

& you have 23 threads?.. Hmmmmmm

 

You changed only 1 spark plug? That old spark plug looks fine. You may have accidentally fixed the misfire by cleaning up some electrical connection somewhere, like at or around the crank sensor or the ignition coil

The simple exercise of unscrewing/unplugging and screwing/plugging in an electrical part in cleans up the connection, even if only a little.

 

Like it says at the topeverything was brand new from coils yo spark plug it was the.crankshaft position sensor that was at fault at fault as its job is to tell each cylinder when to fire.

 

The cps tells the ECM the position of the crankshaft. The ECM fires the spark plugs.

 

If the CPS was at fault, you'd have a non running vehicle. The fault was most likely at the coil or the electrical connection to the coil, not the CPS.

 

The car was running good since January of this year which was the last time I opened and changed my oil. Now all of sudden the cylinder started to misfire starting Friday 4/18/14 and which was weird. As I stated I changed the maf and no difference. Then I checked the spark plug which was looking good put in a new one just in case and still no difference. That left me to the crankshaft position sensor. I had p0305 code that like stated above, last year and everything was fine. Then I went online did some research and changed that sensor and problem was gone. Now the same thing happened and changed that sensor problem gone. Since the crankshaft sensor is responsible for engine timing, the driver may experience engine backfire or irregular rpm function, if the vehicle starts at all.