2001 z71engine shut down. low fuel light no gear indicator showing in dash no spark no fuel pressure. has full tank, engine cranks, fuel gauge is reading empty, has been missing ocasionally. put scanner on it comes up cannot read ignition module. could it be the security system in the ign switch. can this be by passed. this truck is in new zealand so no dealer to check security system. can i reset

Make sure the battery has a full charge.

Are you missing anything besides fuel? Engine cranking visually check for spark at the spark plugs. Also, check for fuel injector pulse. If your missing everything, check for an rpm signal.

With the spider fuel system, start-up fuel pressure can be critical, around 60--66 psi. At the fuel pump connector, engine cranking, gray wire is voltage, black is ground. If good voltage and ground with no fuel pump action, have to suspect the fuel pump.

Gas as in gasoline or gas as in LPG gas? If its petrol, the fuel sender may be out of adjustment. (Usually means a new sender) If its LPG, the fuel stations are set to automatically shut off at 80% full. The gas tank will never actually be full to the brim but the gauge should be showing full if the gas nozzle keeps shutting off. Have a look on the LPG tank itself, they have a little gauge on them which shows how full it is. I have 2 tanks on my car , when "full" or when the pump shuts down, the tank gauges show just under full but the gauge on the cars dash shows full (2005 BA Ford)

Hi you have a fuel pressure switch n the float in gas tank may be sticking

fuel pressure is to low. check fuel pump.

If gauge still shows empty and light is on then inside tank there is a arm thats prob just stuck remove lower rear seat and will see entry to tank gauge has about 3 to 4 screws open and check if arm is down or floating .

This problem is caused by in most cases the fuel pressure bleeding down when the engine is shut off, this leads to air in the fuel line because the fuel leaks back to the pump and then into the fuel tank. The fuel pump is electric and it has a built in fuel pressure check valve in the pressure outlet of the pump. To confirm this is the problem you must have a fuel pressure leak down test run, the test port to check fuel pressure is on the top of the engine in the pipe that supplies fuel and sets over the top of the fuel injectors. You can purchase a fuel pressure test gauge from most auto parts stores for about $20.00. Hook the test gauge up to the test port (it looks like an oversized tire valve) start the engine and verify you have no leaks at the connection of the gauge, once that is sealed and has no seepage of fuel note the fuel pressure at idle, shut the engine down and watch the gauge, it should not drop more than 4 pounds in one hour, in most cases it will drop off right away. If the fuel pump is the problem you will need to replace it, to do that requires you drop the fuel tank down out of the car, this is a very difficult job on the ground, you will need to raise the car as high off the ground as possible, support it on jack stands and then with a hydraulic floor jack support the fuel tank and remove the filler neck then remove the two steel straps that secure it to the cars underside, once the straps are off slowly lower the tank and remove the fuel lines and the electrical connector from the fuel pump/sending unit connector, then remove the tank and remove the retaining ring that holds the fuel pump/sender module inside the tank. Reverse to assemble, then put at least 4 gallons of gas in the tank to prime the pump.

car and it spins over but fails to start, there are three fundamental systems that must work properly and should be checked. The fuel and air management is one. Too much or too little of either one of these and the engine will not start. Second is the ignition system. Not only is a spark required to ignite the fuel, it must be delivered on time and in the right place. Last is the engine integrity. It must compress the fuel and air, contain the explosion upon ignition and convert heat energy to mechanical energy to propel the vehicle. A breakdown in any of the three will prevent the engine from starting.

Crank the car. Listen to the engine. An experienced driver should depend on his ears and know the sound of the engine. If as it cranks the sounds are abnormal, this is a strong indication of a mechanical failure. Each cylinder, when strong and working well, compresses the fuel and air in proper sequence. When this fails due to a timing belt or head gasket problem, everything sounds different. If the engine sounds entirely different while cranking, mechanical repairs are necessary.

2 Install a fuel pressure gauge. If the engine sounds as it normally does install the gauge, turn the key on and watch the pressure indicator. It should read as high as 50 psi. Refer to the manufacturer's service manual for specifications and fuel pressure test procedures. Some have fuel pressure specs as low as 35 psi. If there is no reading, the fuel pump is in doubt. Turn the key off, and the on again, and listen for a brief, faint hum in the fuel tank. The pump is designed to run, then shut off if the vehicle does not start. If there is no fuel pressure and no hum, the fuel pump or pump circuit has malfunctioned. Make sure there is fuel in the tank.

3 Test the ignition system. Remove a conveniently located spark plug wire from a spark plug and install a spark tester. This is a spark plug with an alligator-clip attached. Clip the tester to the engine. This completes the circuit so the spark can jump across the plug electrode. Make sure the clip is attached to bare metal for a good ground. Have an assistant crank the vehicle and watch for a bright spark. If there is none, the ignition system must be repaired.

SYMPTOM/CONDITION:
Symptoms may include no start, rough idle, long crank times, driveway die outs or erratic fuel pressure. A new fuel pump has been released which delivers improved performance. This pump should be used whenever fuel pump failures are encountered.
DIAGNOSIS:
Basic fuel system diagnostics should be used as outlined in the appropriate service manual. A brief recap of the basic diagnostics follows:
Fuel pressure specification - 49 psi - plus or minus 5 psi.
High fuel pressure indicates problems with the fuel pressure regulator. Refer to the service manual for regulator diagnosis. Do not replace the fuel pump for high pressure.
Low fuel pressure - Low pressure could indicate a pump problem or it could indicate a plugged fuel filter or restricted fuel line or no fuel in the tank. Be sure to check these items before replacing the fuel pump.
Fuel System Leak down - When checking fuel pressure be sure to check the integrity of the system after shut down. With the fuel pressure gauge connected, shut the engine off and observe the pressure gauge. The system should maintain at least 24 psi for five minutes after shut down. If the pressure bleeds off quicker, it could indicate that an injector is leaking down or that the pressure regulator is leaking. This can lead to driveablity problems and require further diagnosis.
NOTE: IN RARE CASES WHERE MULTIPLE FUEL PUMP FAILURES HAVE OCCURRED ON THE SAME VEHICLE, A BUILD UP OF RESIDUE MAY HAVE ACCUMULATED ON THE INSIDE OF THE FUEL TANK. THE PRESENCE OF THIS RESIDUE IS NOT EASILY IDENTIFIABLE. THE RESIDUE CAN PASS THROUGH THE IN TANK FILTER AND CONTAMINATED THE PUMP ROTOR. IF MULTIPLE FAILURES HAVE OCCURRED WITH NO OBVIOUS INDICATION OF THE CAUSE, CONSIDERATION SHOULD BE MADE TO REPLACING THE FUEL TANK TO AVOID FUTURE PROBLEMS. PARTS REQUIRED:
I would start here and look at your fuel system closely

If the valve lifters are quiet you most likely have oil pressure even with gauge showing "0".Sounds like the oil pressure switch going bad.I would try that first.

well its either the wire between the tank and guage in dash or it is the gauge in the dash