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Noisy Fuel Pump

jgtoranalc

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Recently I have been hearing a humming sound from rear of car, I checked the boot and underneath the car and found it's the fuel pump.
I have also found it changes its pitch noise when I press power windows switches. I did a forum search and members have just simply just replaced theres even though it new.
I haven't ran out of fuel since 2 years ago and previous owner put a new one in before that.
Usually happens only when vehicle is at normal operating temperature and doesn't matter how much fuel is in it either. Full tank or 1/4 of fuel in tank.

What is the main cause for this?
I don't want to replace it with the new one possibly doing the same thing. Remember it's only been doing the humming noise for about 4 weeks
 

Gus The Snail

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replaced it with a DELPHI brand one , i have used the aftermarket generic one and its crap. DELPHI is OEM , makes same noise as factory pump did ( when it was working well )
 

jgtoranalc

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So what do you recommend? Just put any one of them in and deal with the noise, if it happens again?
 

hako

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My opinion only, but ours has made a humming noise intermittently for the last 8 years....over 300,000km so far. Some Commodores never make any noise.....it probably depends on exactly how they are positioned when installed - maybe try loosening all the screws that hold the pump in the tank and wobble it a bit so it gets tightened in a fractionally different position. (do when fuel low). Or you could give the bottom of the tank a bit of a thump with your open hand and this will jar the pump as the pickup sits on the bottom.
Good Luck.
 

jgtoranalc

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Well I'll have to remove it anyway as when I turn on RH corners it nearly stalls. Which the return hose hasn't been refitted properly from previous owner. So I do have to remove it so i'll have a go at that for now.
 
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