2002 nissan sentra it wont start i got fire on the spark plugs bu

https://www.justanswer.com/nissan/guf6s-believe-security-system-on-2008-nissan-sentra-2-0l.html

sounds like injector failure, or possible fuel pressure regulator

Check the ignition module to see if your getting fire. You can pull off a spark plug wire to check also if you know how to do it

have you checked the coils on each spark plug to do this take out one plug attach the plug wire back on to the plug and ground the plug to the motor and have some one crank over the motor but do not hold on to the plug or you could get a strong shock
mgsoils

If it cranks good but won't start, have a helper crank it while you visually check for spark at the spark plugs. If spark everywhere, check fuel pressure and fuel injector pulse. Go from there.
We can also check circuits for power windows.

Did you miss a connection in the harness ?
Unless the coils are disconnected the plugs should fire if the injectors have pulse.

CHECK FOR SPARK AT SPARK PLUGS, CHECK CRANKSHAFT SENSOR, CHECK FUEL PERSURE, ALSO CHECK FOR INJECTOR PLUSATION.

nissans have an issue with crank angle positioning sensor, you must remove it and check for resistance, it definetly sounds like it cause crank sensors sometimes work when cold then shut off.

Cold start valve or cold start injector. On new fuel injeccted cars they act like chokes did on carborated vehicles.

sounds very much like the coolant temp sensor
, this tells the pcm that the engine is cold, sometimes they fail and tell the pcm the car is at -40 degrees, the pcm then tries to compensate by keeping the injectors open for too long flooding the engine. the part is inexpensive, and normally easy to replace. It can be checked with a scan tool, or a volt/ohms tester,