whiring noise when braking - fuel reserve pump?

[Toady1]

I've noticed a whiring noise like an electric pump running when I come to a slow stop when the fule is around 20 litres, is this some sort of reserve pump on the tank???

[Toady1]

Does no-one else get this then???

[justyr]

Sorry mate, haven't had that on my car.
JR

[ronspeedsix]

There's only one fuel pump. Located in the N/S rear wheel arch.
Where does the sound come from. Rear ? Front ? Left ? Right ?

If you think it's electric : switch off ignition shortly while braking and listen. Be safe : don't depress clutch (loosing power steer and brake assist). If noise is gone it has to to with electrics.


Ronald

[kevin63]

My Chimaera's fuel pump used to whine now and again, but only when it was hot outside or had been stood in traffic for a while. I never tried to cure it, I just put up with it as it wasn't too bad.

[Toady1]

Its weird, i took it out for a drive today (awesome car!!!) and there was 15litres of fuel left before I filled it up, yet it didn't do the noise? It sounds like a noise you'd get from an electric motor or a buxxing relay, only does it when coming to s slow short stop, then once stationary it stops. I'll look into it a bit more but its not really an issue, I was just wondering if they had an extra fuel pump for a swirl pot in the tank or something. It comes from the nsr and sound more like its in the boot area not where the standard fuel pump is.

[kevin63]

Just a long shot, but you haven't got grooved disc on your car have you.

[ronspeedsix]

Or it's the fuel rail returntube to the tank that's fouled. Once had that sort of problem (other car). Looked like the fuel pump had a defect. When idling, or decelerating the pump builded too much pressure and slowed down in rpm. Like a chainsaw at full rpm started cutting and decreasing rpm.
By burning enough fuel the pump came to it's normal rpm but decelerating or idling made it appear again.

Took me a long time to find the cause. Was a bend rubber-hose of the fuel return tube to the tank.

But if it's like this, you should experience the same on tickover.

Ronald.

[Toady1]

I don't think its that but thanks for the post anyway. I mightdrive it to work tomorrow so I'll see if it does it again.