Nissan Repair: Altima 95 2.4 4 cyl no starting, crank angle sensor, throttle position sensor

Question
I park my car one night and at morning he never want to restart.
I got gas 1/4 in tank.
Got firing on coil and sparkplug wire.
I clean rotor.
Check gas pump fuse under dash with test light  ok
Check fuse link under hood with test light ok
Change gas filter.
Get out gas pump relay and test it on car battery. He make click and test light working when click append.
what I do now ?

Answer
well nice warm days are ahead, you can have an excuse here to change that leaking valve cover seal in the process.  to rule out some major malfunctions of this vehicle, remove the plug wires, plugs and take off your valve cover.  inspect to see if the chain is still in tact with the motor.  these can give out at anytime, with no warning.  after all these are examined/repaired, try replacing the plugs first after this.  this may solve the problem.  also pay attention to the crank angle sensor or the throttle position sensor.  i hope this helps!  xxp_Sebby@yahoo.com