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Questions about Fuel Systems



  • I have a 1992 Lincoln Town Car Executive that I am being told that the fuel pump is going out. Where is it located and how would someone know this?
  • 0patience0patience Posts: 1,542
    fuel pump is in the fuel tank.
    What kind of problem are you having?

    The only way to confirm if the fuel pump is having a problem is to check the fuel pressure and see what it is.
    Or, if it is making unbearable noise.

    But before replacing the pump, the fuel filter should be changed if it has been a very long time since it was replaced.
  • car is making a whistling sort of noise and someone told me it was the fuel pump. It does need a new fuel filter so I will do that and have the pressure checked. Thanks so much for your reply
  • 0patience0patience Posts: 1,542
    Is the whistling noise a bussing noise or a whistling noise?
    Is it coming from the engine compartment or the rear of the vehicle.
    If it isn't coming from the rear of the vehicle, in the area of the fuel cap, then it isn't the fuel pump.

    If it is a whistling noise in the engine compartment, then it could be a belt or pully.
    Hard to say.
  • It is a whistling sound and I hear it when I am in the car so hard to say where it is coming from. It does not make the sound all the time. Another question I have is how do you get to the fuel pump? Does the whole gas tank have to be dropped and access gained that way?
  • 0patience0patience Posts: 1,542
    Another question I have is how do you get to the fuel pump? Does the whole gas tank have to be dropped and access gained that way?
    yep, the tank would have to be dropped.

    Honestly though, if it is a whistling noise, I seriously doubt it is the fuel pump.
    I Can't hear the noise, so I could be wrong.
  • Question. The new 2007,2008 Dodge Rams, in the event of an emergency, could a person run A-1 kerasene without damaging the diesel engine, or would it even start using kerasene? I understand the new engines, that the computer won't like the stuff. The new low ultra sulfur stuff is all it takes. Some one told me that kerasene would destroy the fittings, seals, fuel lines, fuel pump ad fuel injectors. Again however, in an emergency, how far could you drive and would it damage anything electrical? I understood that you could run kerasene and that in fact thats basicly what was being used in the winter time from the gas pumps. However, hearing about the new ultra low sulfer diesel makes me a little worried. What do you think anyone. Thanks
  • 0patience0patience Posts: 1,542
    Some one told me that kerasene would destroy the fittings, seals, fuel lines, fuel pump ad fuel injectors

    Yep, pretty much.
    The new engines aren't as forgiving as the older diesels.
    I wouldn't run kerosene.
  • Mr_ShiftrightMr_Shiftright CaliforniaPosts: 44,403
    I can't imagine an emergency where kerosene would be easier to find than diesel fuel anyway. Diesel fuel is not particularly volatile, so it could be carried in the truck, if securely fastened.

    I would imagine you'd destroy your injection pump using kerosene, which has no lubricating properties whatsoever----diesel fuel does.

    I think you've been misinformed. Some people have added small amounts of kerosene to diesel fuel in brutal winter conditions (the Russians did this to their tanks in WW II, before the Germans copied the idea) but those were primitive older diesels.

    Modern diesel engine are pretty fussy as to what you put into them.

    So, in short---don't even THINK about doing this. ;)


  • Hello everyone,
    I need some help. I have a 2001 Chevy 3500 van with a 5.7 v-8 engine. When I turn the key to start, the starter works and the motor runs. As soon as I let the key go, the motor dies. Happens everytime. Any ideas?
    My E-mail is
  • kiawahkiawah Posts: 3,666
    Sounds like a bad ignition switch.
  • sap1sap1 Posts: 4
    I have 1992 toyota camry v-6 that i had the gas filler pipe replaced. After replacing this and filling my tank i noticed i had a gas leak from the tank area. When i took it back the mechanic stated the small braided hose to the filler pipe was the problem so i replaced this. When I filled it up it leaked again dripping down from the tank. The mechanic then said i have a hole in the tank. This problem did not exist before i replaced the filler pipe.

    When you drive it about 40 miles i do not notice any gas leak. What else can I do. The gas tank on this car is very expensive and i do not want to replace unless necessary
  • dtownfbdtownfb Posts: 2,915
    Seriously, take it to another mechanic for second opinion. Your first one is simply guessing and replacing parts at your expense.
  • I just replaced the head on the 2.2 L dodge omni. The timing is correct, fuel is getting to the carb and good spark to all cylinders. But, the engine won't start, I think when I had the head off I fliped over the head and activated the fuel shutoff safety device. How do I reset the fuel shoutoff safety device?
  • kiawahkiawah Posts: 3,666
    Do a compression test on the cylinders, to confirm that your camshaft timings are correct.
  • I have a 93 ford thunderbird 5.0 and i have to crank it for a few seconds to start it at all times but when its very cold it dies sometimes and the second time i crank it it fires right up and fuel pump is making noise at all times as well other than that it runs perfectly no hesitation and plenty of power also idles smooth is this the start of a major problem replies appreciated thank you.
  • Mr_ShiftrightMr_Shiftright CaliforniaPosts: 44,403
    I would check pressure in the fuel rail. Perhaps the fuel pressure regulator is bleeding off. Also perhaps the rail is not being primed when you turn the key to "ON", before you crank. This would be a relay problem.


  • Thank you, but do you mean the fuel pump relay or a diffren't one also what about the fuel pump noise its working but is very annoying and i don't know how to test the fuel pressure ty again.
  • Listen very carefully for the noise when you turn the key to the on position do not start the engine if you hear the noise then its probably the pump.It will run for a few seconds when you turn the key on if not I think you may have a vacuum hose leak.
  • Mr_ShiftrightMr_Shiftright CaliforniaPosts: 44,403
    Yes you need a gauge and a T fitting to test pressure in the fuel rail. Also there is a fuel pressure regulator that might be leaking. What I'm driving at is that at night the fuel pressure may bleed off in your system so that the fuel pump has to prime the entire system before the car can start.


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