I hear a consistent humming noise coming from the rear of my car. Its sorta faint...but I hear it when Im stopped at a light or in park, i poked my head back towards the trunk and I definitely hear a humming sound...maybe coming from the fuel tank??? I dont know.

Cory

 

Fuel pump is on it's way out.

 

thats what i was afraid of. I let someone else drive my car the other day and look what happens. Could it also make this noise if there is bad gas? Or perhaps even if someone put 87 octane in, when the car has been run on 93 octance for years and years?

 

If the fuel level is really low you might be able to hear it, besides that you should never be able to hear your stock fuel pump, and you should never hear it because there isn't enough fuel that is how they get burnt up so fast. Not enough fuel = humming = not enought cooling for the pump = fried pump (over time).

 

Well the tank is full. So this is obviously a bad thing. Anyone got a fuel pump?

 

That happend to me once... turned out I accidentally sucked up a mustang and it got logged in the fuel lines... looked like a cobra I think. Totally ruined the pump, but buy yourself a 20 dollar fuel pressure tool guage and find out what pressure the pump is reading at.

 

I've been able to hear my pump since I got the car in March. It's a high pitched whine. I think I can hear it when I'm stopped. I'll have to pay attention now. So, it's not normal to hear the pump then?

I haven't tested my fuel pressure, but I never have any problems starting the car and I've not had any high RPM problems. Also the car starts as soon as I turn the key practically.

Should I test fuel pressures or could it be an aftermarket pump? I doubt that though since the car was bone stock at 54k miles. I also really doubt that the fuel filter was ever changed... and I've been really lazy to take it to a shop.

 

If you have a stock pump, no it is not normal to hear it.

 

Sometimes fuel pumps make a little noise, there may not be nothing wrong with your car at all. If you are that worried though, I would do what the others suggested, hook up a FP gauge and see what the fuel pressure is doing.

 

I have noticed a faint buzz/humm from the left rear of my car as well. Almost sounds like a bad ground or interference through the speakers. However this is not the case since even with the system off it is there. Also dont here it unless the car is running. This has happened since I owned the car (4 years) / 70000+ miles). I always assumed its the fuel pump and I have never had a problem with it. So maybe some are noisier than others So based on my limited experience it does not mean your fuel pump is going out I dont think.

 

Too add to this now. I have started up and driven the car and tried listening for it. I heard it again today, but then started it up shortly after and did not hear it. Very odd, sometimes it humms louder than other times as well. I guess as long the car is running fine, I will not worry about it. Because, I believe swapping out a fuel pump involves some quality time.

Cory

 

I hear a whine once and a while in the back...but it's been going on for years...haven't really affected anything.

Why don't you change your fuel filter first and then measure the fuel pressure. I hear it's some work to get to the fuel pump...either drop the tank or use the "trapdoor" method to reach it from the top with tank installed. Either way, fuel filter is quicker and pressure reading will tell you what's really going on.

 

Not a bad idea. I changed the fuel filter probably 15K miles ago. So I guess it wouldn't be to bad to swap that out. I gotta get a fuel pressure meter though.