Ok, thanks for reading this. I have a 2012 maxima Sv. ( absolutely love the car). I have had ration of issues with the girl lately. Funny how that works.

just give back ground the series of events.

First the radiator blew, which was not a huge deal. So while i had thw front of the car apart i decided to replace the the headlight assembly. The original had the HID headlights. So I purchased some new assembly and some Led lights. Pretty easy transion and looked really good. I did however have to re pin the plugs to except the new LED lights. I also replaced the valve cover gaskets. Which was not to bad and gave me chance to clean the engine bay.

OK, Now the issue. I was driving hime about two weeks after completing the project above and it just died. Towed the old girl home. Ran through some of my shade tree diagnostics and determined the fuel pump was bad. No big deal pretty simple task. Purchase a fuel pump from the local Advanced auto popped that baby in. The car turned over and fired up. It ran very rough. It had a dead skip. Hooked it up the code scanner and got the d

random misfire code. So I checked the coils and one of them was bad. No big deal changed the number 3 coil pack. Still had dead skip. Sonthen i read were one of the local gas stations was known for having bad gas. I pumped all the gas from the tank and new gas and can of seafoam for good measure. Still had dead skip. By this time I am getting slightly annoyed. So I checked the fuel injectors and ended changing the fuel rail and all the injector. Then I checked everything. Did a compression test, Tested all the injectors, checked every coil pack every plug for 12 volt power. I put it all back together sat in seat gave it a pep talk. Turned over the engine and fired up and ran like sewing machine. Just beautiful i tell you. I let it idle for about 30 minutes. All of sudden she quit. I mean stopped cold. The engine would turn over but would not start. So back to square one. I pulled the crankshaft position sensor and ohmed it. It ohmed on the lower end I assumed that it could be going out when the engine reached operating temp so swapped it out. Nope nothing. I am getting 12 volt power to all the plugs. I am not getting any spark to any of the plugs. I have charged the battery. I have checked everything I can think of. Does anyone have any ideas or advice?? And thanks reading this.

 

Man, that is tuff. I assume you verified signal to the coils or pulled one out to watch the plug for fire? If all the signals are getting to the ecm and not getting to the plugs it has to be connectivity or sensor/ecm
I know you replaced the cam sensors but, as I am sure you are aware, new doesnt meam good. Sure would help if you can get a scppe off the cam and again off the ecm

Other than scoping signal, the only other thing I can think of to do is to recheck all your connections from both cam sensors and to the ecm. Running forc30 min sounds heat/vibration related but couls be infant mortality on the sensors.

Please let us know what you find!

 

Thanks for the reply. I only replaced the crank shaft position sensor. I plan on taking it out this weekend and getting another one. It looks like there are 4 cam shaft position sensors. Would it run if only one of them are bad? I think my next step if that swap doesn't work. Is to start scoping. Thank agian for the reply.