When I turn on the ignition the fuel pump does not work and I cannot start the motor. What could be reason and remedies\\

If your 1999 Saturn SL turns over but won't start, there could be a few different reasons why. Here are some possible causes:

Faulty fuel pump: The fuel pump is responsible for delivering fuel from the tank to the engine. If it's not working properly, the engine won't receive enough fuel to start. You can check if the fuel pump is working by turning the key to the "on" position and listening for a humming sound coming from the fuel tank. If you don't hear anything, the fuel pump may be faulty.

Dead battery: If the battery is dead, the engine won't have enough power to start. You can try jump-starting the car to see if that helps.

Ignition system problems: If the ignition system isn't working properly, the engine won't start. This could be caused by a faulty ignition coil, distributor, or spark plugs.

Clogged fuel filter: If the fuel filter is clogged, fuel won't be able to flow properly to the engine. This can cause the engine to stall or not start at all.

Bad crankshaft position sensor: The crankshaft position sensor tells the engine control module (ECM) when to fire the spark plugs. If it's not working properly, the engine won't start.

These are just a few possible causes of a Saturn SL that turns over but won't start. It's best to have a qualified mechanic diagnose the problem to ensure that it's fixed correctly.

First make sure the fuel pump is working, there's a valve stem on top of ur motor, on the fuel rail turn key on an use a towel to push the valve stem in! Becarful gas should shoot out if not it could be ur fuel pump!

There could be several reasons why your 2002 Altima won't start even though the engine is turning over. Here are some common causes to consider:

1. Fuel system issues: If the fuel pump, fuel filter, or fuel injectors are not functioning properly, then the engine may not be getting enough fuel to start. You can check the fuel pressure and fuel pump relay to see if they are the issue.
2. Ignition system problems: If the spark plugs, ignition coil, or ignition module are not working correctly, then the engine may not be getting the spark it needs to start. You can check the spark plugs and ignition coil to see if they need to be replaced.
3. Battery issues: If the battery is dead or not providing enough power to start the engine, then the engine may not start. Check the battery voltage and connections to make sure they are in good condition.
4. Starter problems: If the starter motor is not working correctly, then the engine may not start. You can check the starter relay and wiring to see if they are the problem.
5. Mechanical issues: If there are any problems with the engine's timing, compression, or other mechanical issues, then the engine may not start. This would require a more in-depth diagnosis by a mechanic.

It's best to have a professional mechanic inspect your car to determine the root cause of the problem and make any necessary repairs.

You didn't tell us is you have the 4 banger, 3.0 or 4.0 V6 engine.

The engine can stall for a number of reasons. For a engine to run it requires air, fuel, compression, and spark at the proper time. I doubt air is the problem. The fuel pump may be cutting out (bad pump, bad relay, bad pump wiring inside the tank (my 93 3.0 Ranger had the last issue). The engine stall could be a lack of fire to the plugs. A bad (cracked) coil, ignition module problem, EFI computer or wiring problem, or maybe an ignition switch problem. The starting system is somewhat isolated and pretty much separate from the ignition system in general. This makes me suspicious of your ignition switch.

did you prove ignition try a timing light to verify its flashing to speed of motor , next try a little spray of starting fluid, if it starts then you know its a lack of fuel problem ,there is no reason that you wouldn't get it to do something.if it has spark and fuel

CHECK FOR SPARK AT SPARK PLUGS AND TURN IGNITION SWITCH ON POSITION LISTEN SEE DO YOU HEAR FUEL PUMP TURN ON 3 SECONDS IF NOT CHECK FUEL PUMP FUSE AND RELAY. IF ALL IS GOOD.HAVE VECHICLE SCANNED FOR FAULTY PCM - FAULTY IGNITION MODULE - FAULT IN THEFT SECURITY SYSTEM.SCAN FOR FUEL PUMP AND CRANKSHAFT SENSOR FAULT.REASON YOU NEED VECHICLE SCANNED IT WILL HELP LOCATE PROBLEM QUICKER TO KEEP FROM BUYING A LOT OF NEW PARTS YOU DONT NEED.

remove the fuel line from the fuel rail and turn the ignition on, if the pump is working there should be fuel coming from the hose, if there is none go back to the fuel filter and remove the inlet hose from the fuel filter and turn the ignition on, if fuel comes out from there your fuel filter is blocked, if there is no fuel your pump is not working

Check Fuel Pressure. First turn key to on position (without starting) and listen for the fuel pump motor. If no motor sound, your fuel pump is not working. Check fuel pump fuse and relay. If fuel pump works, check for pressure at the fuel rail (schrader valve on fuel rail for pressure testing). If no pressure, or not enough, fuel filter might be clogged or fuel pressure regulator may not be working properly. IF fuel is not the problem, start checking electrical, such as ignition control and proper spark to plugs.

Get a DTC scanner and see what it says...in the meantime, check that fuel pump relay and fuel pump. The humming sound is probably the heater blower motor or part of the HVAC system winding down after disconnecting from power.

I would guess that the 12 volts supplied to the fuel pump comes for the damaged ignition and is no longer getting the 12 volts to turn it on. Seems reasonable to me..