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Hi you can do a small test to see if the pump is u/s or the wiring is at fault, locate the 2 wires going to the fuel pump, get a small voltage bulb and 2 wires, find which is the + and which is the - on the pump wires and then tape the wires to the bulb in the order of, out side rim of bulb is - and the bottom of bulb is + then it is just a simple case of turning the key and seeing if the bulb lights up, if it does then its the pump if not then its wiring or fuse fault...you can test pump to but you will need to gain access to a + and - connection, ( i use the rear lights as then you do not need such long wires and just turn lights on to supply the power ) just connect the wire to the + and - going to the pump, and listen for a humming noise if you hear it then pump is ok, if not then pump u/s..phew lol, hope that helps please vote thanks
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take it out and have it tested
fuel pumps fail mainly from running without fuel in the system
other problems indication a pump problem come from
faulty pump relay , faulty fuel pressure regulator--controls the fuel pressure and the pump relay ,--- wiring, bad ground for the pump, EVAP --not allowing the tank to vent and the pump runs in a vacuum situation or problem ECM not passing the requirement to pump onto the pump relay to start pumping
Robert: According to CarGurus.com: " I agree it may not be your fuel pump. You can access the pump under your back seat, underneath the cloth under there. You will iummediately see the plug and the screws to open the little hatch. My 1986 Camry also has a problem with not getting any fuel and thought it was the fuel pump. turns out I keep blowing my efi fuse so i unplug the power wires to the fuel pump and it still keeps blowing the 51a efi fuse. So we have narrowed it down to being an electrical problem. We think it is a shortage or a bad relay. So do not instantly run out and think it is your fuel pump. If you are blowing fuses unplug the power wires to the fuel pump and try to crank the car if the fuse still blows then it is not a bad pump, if it does not blow then there is a shortage in the wires in your fuel pump. Hope this helps I will let you know exactly what the elctrical problem is in my car once we do a complete run down."
replace fuel filter.listen for fuel pump operation with ignition switch on position for 3 seconds should hear fuel pump running should have humming or churling noise if so fuel pump working if hear no noise fuel pump faulty or could have blowed fuel pump fuse or bad relay.if fuel system okay problem could be ignition timing off due to worn broken timing belt.could have faulty ignition module.bad crankshaft sensor or camshaft sensor best to have vechicle code scan first before buying alot of new parts.could have bad ECM. many things will cause no start problems i.dont know model type vechicle.could have bad spark plugs wires. distributor cap and rotor could be bad.ignition coil could be bad.
Hello and welcome to FixYa!
Try to loosen the bolt on the fuel rail then turn on the ignition but don't crank the engine. If the fuel doesn't flow then it's definitely a bad fuel pump which will surely require replacement.
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Well that could be a indication of a bad fuel pump, but it could also be a bad or clogged fuel filter, or even a really needing a tune up... When was the last time you changed the plugs and wires? I would do that before I ever got into the fuel pump issue... You can have the pump pressure tested. Do the plugs and wires, next do the fuel and air filters... If that doesnt help have the pressure tested...
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