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Loud Noise

senilykSkylines

By senilykSkylines,
in General Maintenance

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senilykSkylines Collaborator

senilykSkylines

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Hi peoples,

Just would like to ask about a weird sound coming from my car. I took it on a road trip down south and quite honestly it performed brilliantly. However, after driving for a few hours and I would stop to get drink etc, a loud high pitched sound comes from under the car when idling. It sounds an awful lot like the fuel pump, but quite loud. I would start the car (the following day) and it would be fine. I even drove it like half an hour or so into town and it would still be fine. But it did it again on the long trip back home. It seems rather intermittent, and if it is the fuel pump working hard... why on earth would it be working hard at idle?

Is it even the fuel pump?

I installed a Walbro GSS342 a couple of months ago. So it is a new pump.

Car appears to run fine though.

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senilykSkylines Collaborator

senilykSkylines

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if it is the fuel pump it would sound like it's coming from the rear of the car. it may be something like the throw out bearing in the clutch of something like that.

It has been doing it just now. I am pretty sure it is coming from the fuel tank area and sounds like the fuel pump, a high pitch electronic sound. When I first installed it I could hear it change pitch as I was cruzing at 10km or so as I I touched the throttle. But now sometimes it doesn't change pitch and just stays loud. But then it doesn't do that all the time, only when the car has been running for a while.

Edited by senilykSkylines
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senilykSkylines Collaborator

senilykSkylines

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Not sure, definitely not a rattling sound. Sounds like a little motor ie the fuel pump. It's like a high pitched tv sound (You know, like hearing a tv on in another room). If it was rattling it would be consistent I would have thought.

Fuel pumps aren't hard to install. I however left some wires screwed together and bare in the tank a few weeks ago and so I opened it up to cover and crimp them so they wouldn't short on the side or something dumb like that. I pulled the bracket out and I noticed the little filter on the bottom of the pump had little fluff or some kind of stuff on the out side of it which I took off (must have collected some kind of muck). I also remember the mesh filter being white when I first installed it, but it seemed to look grey/black? I wasn't sure if it was a black plastic tongue (or something) inside the white mesh showing through once it was wet. I dunno if it was suppose to look that colour.

It might be a leak, but then it would always be doing it if it was. Could it be that the pump switches on longer if the computer has sensed a certain driving habit? like it is ready to go?

I have a Z32 ecu in at the moment.

Edited by senilykSkylines
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  • 2 months later...
senilykSkylines Collaborator

senilykSkylines

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couldn't possibly be the pump vibrating on the bracket, or the bracket vibrating against the tank?

My tuner had a listen and he thought it was the same thing. He also thought it could be bearings which would be unlucky since it is a new pump.

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Mayuri Krab Grand Master

Mayuri Krab

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I think it's normal. mine is louder at times then others and sometimes some vibrations against the petrol tank are heard. 040 though

My 040 has a high pitched whine noise all the time (much louder compared to the stock pump it replaced), noise is most noticeable at low speed & throttle (ie driving around in car parks) as @ higher speed the engine, exhaust & road noises covers it up.

Being doing that for 2 years now & still no problem.

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turael Enthusiast

turael

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Just leave it, who cares. Unless you really don't like the whine :P

The 040 in my 180 has buzzed, screeched and sounded like it was shitting itself from day 1

been in there for years now, as far as I'm concerned it's pretty normal :)

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