My car will run sometimes just fine then the next day it will not start at all. pulled line from fuel filter to see if it had gas flowing thru lines it did but still would not start. tried to see if it got spark to spark plug by pulling coil off and turning over engine did not appear to have spark so pulled spark plug and turned over engine car started and ran ok that night and all next day but would not start next morning.

Sounds like you got some bad gas. May need to replace the fuel filter

Very likely your fuel filter. Sometimes trash will get in the filter. The trash (debris) will settle to the bottom when nothing is being sucked through the filter (the car is not running) so there is no obstruction in the line. When the car runs the gas gets sucked through and at some point pulls that debris into a position where it blocks the flow, thus no gas get through and the car dies. Try changing your fuel filter.

find the filter pull it off and clean it if u cant clean it replace it they usally are cheap on older vehicles but with the filter off turn the car have someone turn the car to the on position so the pump is pumping and see how good it is coming out of the line if not very good then your gas tank line to the fuel filter is clogged but if its fine check the next fuel line the one on the fuel rail there is a bolt on the fuel rail crack it open and have someone turn the key if gas comes out then you are getting fuel and that would mean your injectors are bad

You would need to figure out if the problem is too much air or not enough fuel.
The carb has three internal circuits - - idle, cruise, and accelerate.
Fuel flows thru each circuit from the bowl to the venturi.
You could have a vac leak that is allowing too much air to enter the intake, or the idle circuit on the carb may not be adjusted correctly after the engine warms up.
Or it could be something else.

Lawn mowers have had that problem before and what it was is rust or a object in the fuel tank blocking the flow of gas you might try changing the fuel filter there could be contaminate in the fuel line one way to test that would be to disconnect the fuel line from the engine and aim it in to a gas can and have some one turn the key to the on possition watch the flow to see if it sputters if it does theres the problem , then you should replace the fuel pump and filter as well as the inline filter.

Raise the left rear of the vehicle with a floor jack.

Turn the ignition off and remove the fuel filler cap to relieve any pressure that has built up in the fuel tank from evaporating fuel. This will prevent fuel from spraying and running down your arm when you release the fuel lines.

Use the fuel line quick disconnect tool to remove the lines from the fuel filter by slipping the tool into the quick disconnect until it spreads the retainer and allows the line to be removed. Push the line onto the filter while pushing the tool into the fitting, then pull the line off the filter. When both lines are free, unsnap the filter from the bracket.

Snap the new filter into the bracket, noting the markings that indicate flow. Flow should always be toward the engine. Push the line fittings onto the filter nipples until a click is felt, and the line can no longer be pulled off the filter.

Prime the fuel system by turning the ignition key to the "Run" position for two seconds and then to the "Off" position. Do this three times and then start the engine. Check the filter quick disconnects for leaks then test-drive. 2001 mazda tribute, good-day !

There may be more specific solutions along shortly, but my older car had similar problems until I changed the ignition module. The "spark box" as it was nicknamed. My car was a mustang, but it only seemed to act up on hot days, and if I just pulled over and allowed the car to cool for a bit it would go again just fine. I'm not familiar with Nissan trucks specifically, but it's another place to consider. Good luck!

crank sensor will fix it

Most likely gas line has rusted thru where it is clamped to the bottom of floorboard, or the fuel filter has rusted thru.