Hi. WHen I turn my ignition switch on, without starting the engine, should the fuel pump pressurize and shut off, or continue to run making a hissing sound. it also makes this sound when being driven. Seems like fuel pressure regulator making the noise. Car just quit on me while idleing, burned out starter.
The fuel pump should prime for second or two when turning the ignition on. Then the fuel pump should run when the engine is cranked when the ecu detects a signal from the crank sensor. If the fuel pump runs all the time make sure the relay has not been bypassed with a piece of wire. If its been bypassed it leaves the car in a dangerous condition. In the event of an accident and a fuel line is ruptured the fuel pump will run continually with a huge risk of a fuel fire.
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There is a distinct sound that has a hissing component when you first turn on the key. It will last a second or two when the key is turned to the run position. When the engine started the sound will return and continue to produce the noise so long as the engine is running.
A relatively low noise is normal. If you are concerned check other like cars for the loudness level.
The pressure regulator on the fuel rail can also produce a sound when the fuel pump is running. The regulator is under the hood and any reasonable noise would not be a concern, A clicking sound is also normal throughout the fuel system when the engine is running created by the fuel injectors cycling.
Most original fit EFI in tank fuel pumps are designed to shut down when the engine stops running with the ignition switched on. This is a safety system eg inthe event of a frontal collision which disables the engine and a fuel line is severed the fuel pump should shut off. Its considered not a good idea to run out of fuel as this can cause internal damage to the fuel pump also poss cause the fuel filter to be contaminated. Is this a siutable answer?
Probably lost either spark or fuel to the engine. Try starting it with starting fluid into the intake. If nothing happens, check for spark on a spark plug wire- probably the ignition system. If it runs for a second or two with starting fluid, it is a fuel problem-check fuel pressure to see if the fuel pump is still working.
Do you hear the fuel pump switch on when the ignition is turned on by listening at the fuel pump with ignition on you should hear a hissing sound for a few moments and then once the fuel pressure is reached the pump will stop. If not check the electrics and fuses.
Could be the fuel pump relay, or a faulty pump, or pressure regulator. The fuel system is supposed to hold pressure after you turn the engine off. A faulty pump or pressure regulator could allow fuel to drain back into the tank overnight. You would need to crank the engine for several seconds to build pressure back up. The relay could be faulty and not giving the fuel pump power until the oil pressure comes up.
The only way to know for sure is to hook a gauge to the rail and check the fuel pressure when it won't start. Sitting for a few minutes and restarting is normally a sign of a relay or coil cooling off. There should be a EEC relay that powers the dist module and ECM. I know you said you have spark, but it could be something else related. Also, if you have spark at the right time and no fuel pressure, you should be able to use starting fluid to substitute. I don't suppose you have dual tanks and the switching valve is the problem ?
Relieve fuel pressure (See procedure below). Remove air duct. Remove accelerator cable bracket. Remove vacuum hose from regulator. Remove fuel return hose from regulator. Remove screws and regulator. Reverse procedure to install.
RELIEVE FUEL PRESSURE Disconnect fuel pump relay (See Diagram). Start engine and hold at 1600 RPM until engine stall. Turn ignition switch off. Allow engine to cool completely before performing any fuel system repairs.
That is a real good question. Have you checked the fuel pressure on the fuel rail to see how much pressure there is when it refuses to start? It sounds like you may be losing your fuel pressure because of the fuel returning to the tank when the engine is hot. This could be due to a faulty fuel pump assembly or a faulty fuel pressure regulator.
Try this: When it doesn't start, turn the key OFF and wait about 15 seconds, then turn it back to the ON position (do not try to start yet). Repeat this a second time, only this time turn the switch to the START position. If the engine starts, then it is definitle due to loss of fuel pressure in the fuel rail. You will then need to test your fuel pressure with a gauge and plug off the return line to determine if the problem is being caused by the regulator or the pump.
There is a fuel pressure regulator on the fuel rail. It could be bad. To check this pull off the vacuum line and turn the ignition on without trying to start the car. If fuel comes out of the vacuum hose fitting the fuel pressure regulator is bad. Another possibility is a bad fuel pump. Check your fuel preasure. If low or non exisitant replace fuel pump only after checking fuel pressure regulator. Good luck.
sounds like clogged or clogging fuel injectors,sorry for delay in the answer in your problem, been busy w/other issue . suggest easy solution to your problem, purchase lucas fuel injector cleaner,add to your fuel tank. cost $5.00 treats 20 gallons of fuel. just add the ammount that you need. follow the directions on the bottle, you can purchase at auto zone or advance automotive if need be to clear up the sputtering problem. note' there will always be hissing from the gas cap[normal] due to pressure from your fuel pump,it pumps around 180lbs of pressure to the fuel rail that operates your engine the fuel pressure regulator on the fuel rail;regulates the pressure to your injectors, that's what makes your engine run so smoothly.