Loss of power , white smoke coming out exhaust smelling like gas , shaking , check engine light blinking .

 

Stop driving your car. A blinking CEL is a severe misfire. Probably a bad coil or plug. Or both. And invest in a code reader, with Nissan/Infiniti one should come standard!

 

Thanks I had put the code reader and it was reading a misfire on cylinder 6 and a random misfire I changed all spark plug and tested fuel injectors all seem too be good except the one for clyinder 6 it was letting out lots of gas I replaced but problem continues

 

Try swapping one of your coils to see if the error code moves. I'd look up the FSM and follow the procedures for checking the harness and wiring.

Next, I would inspect the coolant, oil, and do a compression or leak down test.