electric fuel pump

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rutter123
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electric fuel pump

Post by rutter123 » Sat Mar 29, 2014 1:08 pm

should the electric fuel pump run at a constant pitch/whirring, as mine sounds fine whilst its priming up but once the engine is running the pitch seems to change quite considerably almost as tho its having trouble sucking the fuel up-speeds up slows down, there is plenty of fuel in the tank.
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Way2go
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Re: electric fuel pump

Post by Way2go » Sat Mar 29, 2014 2:55 pm

Fuel pump running is going to depend upon rail pressure, usage, and return flow.
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Jaba
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Re: electric fuel pump

Post by Jaba » Sat Mar 29, 2014 11:04 pm

The pump works hard when you switch on ignition as it primes and pumps the fuel rail up to pressure before the engine starts.
When the engine is running it delivers more fuel than is required and the surplus is returned to the tank via the pressure regulator. So it is then running at a constant rate audibly and will sound different from when you first switch on.

Whether yours is behaving normally or not depends more on how the car performs than how the pump sounds though.
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Re: electric fuel pump

Post by rutter123 » Sun Mar 30, 2014 2:14 am

turns out it was f####d not making 1 bar pressure.
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Thread Bear
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Re: electric fuel pump

Post by Thread Bear » Sun Mar 30, 2014 8:05 am

Humbug - the new unit of pressure. :lol:

Had a similar thing on, was it the Visa GTI? Should not be particularly aware of the pump working really, so I am not sure its good news, if you become aware of the pumps efforts. Your experience tends to confirm that. Trust it is not going to be an expensive repair as I know nothing about the BX installation. Some cars are not easy. I was working in the print when mine went so it went to a garage for a big bill of some sort.
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rutter123
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Re: electric fuel pump

Post by rutter123 » Sun Mar 30, 2014 3:08 pm

Yes im sure a garage would be particularly pleased to take a few hundred pounds from you for what is a relatively simple job, asides that i would hazard a guess that the pump fitted was the o/e factory fitted pump, so 25 years service is quite acceptable. At a cost of just under £50 for a new one inc new clips and 2 filters and some fuel line its cured the problem, tho i dont expect it will last 25 years.
90 BX Tzd turbo 294k SORN undergoing major surgery
90 BX Tzd turbo estate 46k awaiting surgery
65 Peugeot Boxer Van the new workhorse
52 Toyota Rav4 180k Bulletproof Jap reliability