ditchlewis
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| posted on 7/7/08 at 02:57 PM |
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Electric Fuel Pump, how much noise
i've just fitted a facet electric pump, and it does not appear to be pumping fuel through to the carbs.
i know that they are noisy but it is like nuts ratteling in a bucket.
i've tried to prime it by pouring petrol down the pipe into it, and i've checked all pipes for kinks and air leaks.
what are the possible problems ?
ditch
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richardh
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| posted on 7/7/08 at 02:58 PM |
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prime it with vaseline...............
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Howlor
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| posted on 7/7/08 at 03:03 PM |
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They should rattle away until pressure is reached then cut out. I know it sounds silly but are you sure it is mounted with input and output correct
and that the terminals are correct. I presume the terminals may make a difference.
I had no issues priming them in the past even with them mounted high up on cars.
Steve
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dan__wright
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| posted on 7/7/08 at 03:05 PM |
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sounds like it may be running the wrong way so its cant prime itself so its noisy. that or there is a lot of air in the pipe stopping it from actualy
getting enough fuel to prime, i had that problem.
FREE THE ROADSTER ONE…!!
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Mr Whippy
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| posted on 7/7/08 at 03:09 PM |
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Usually it taps away till they build up pressure and then go quiet. If it’s not a new one I’d suspect a stuck valve, try blowing through it from ether
end, might unstick it, not sure I like the idea of priming it with Vaseline, that stuff is like silicone and will only clog up jets and filters,
should not even need priming.
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02GF74
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| posted on 7/7/08 at 03:15 PM |
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which type of facet?
solid state (metal cube) or diaphragm (cylinder)?
there is usually one wire to 12 V the earth is via the body.
have the s.state one and it is quite noise but does quieten down when primed.
never needed to prime it. the s.state ones are push type so should be mounted low near the tank, having said that I did have one mounted in the
engine bay and it worked.
is it a new pump?
again if s.state, there is a small filter - inline metal cylinder. thse can get blocked.
remove it and tap the crap out and refit - worked so far for me.
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John Bonnett
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| posted on 7/7/08 at 05:44 PM |
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Hi Ditch, I fitted a solid state Facet to my racing A40 and it always ticked very loudly. It was never like an SU pump or Facet Red Top that do go
quiet when primed. In a racing car it's not a problem but I can imagine how irritating it must be on the road.
If you change to a Red Top, you will also need a Filter King regulator so not a cheap option but it will certainly be much quieter.
atb
John
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les g
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| posted on 7/7/08 at 06:01 PM |
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hi mate
a friend of mine got caught out by a bung in the pipes on the pump
cheers les g
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MikeRJ
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| posted on 7/7/08 at 06:42 PM |
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quote:
Originally posted by Mr Whippy
not sure I like the idea of priming it with Vaseline, that stuff is like silicone and will only clog up jets and filters, should not even need
priming.
Not sure I like the idea of it in a fuel pump either, but Vaseline is pure petroleum jelly, not a hint of silicone in it. It's also used for
packing out oil pumps on e.g. Rover V8's to encourage them to prime.
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mark chandler
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| posted on 7/7/08 at 08:13 PM |
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Do not choke it with vaseline... thats what you use to prime a rover v8 oil pump!
They make lots of noise if you have any air leaks, only shut up when full of fuel unless you have a fuel return in which cas they will keep clicking
away so:
So if you have a fuel return you need to restrict this, usual thing is an old carb jet pushed into the tank return tube and clamped with a jubile
clip, as long as the carbs do not flood this should slow things down.
If you do not have a return then pull off the pipe feeding the carbs and block it, this should stop the pump dead in its tracks after 2 seconds as the
pressure builds, if not then you have an air leak between the pump and the tank.
Ideally the pump wants to be level with the bottom of the tank, they do not like pulling fuel uphill just pushing it forward.
Regards Mark
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David Jenkins
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| posted on 7/7/08 at 08:40 PM |
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I guess that you haven't got a return as you're running carbs - is that correct? If you have a return, ignore the following advice!
If so, there may be a few causes:
1. You have a fuel leak, and are pumping your fuel everywhere!
2. You are pumping at too high a pressure, and the pump is overcoming the float valves - possibly flooding the engine.
3. You have the pump's fuel in and out pipes connected the wrong way around.
4. Your pump is faulty.
Does the engine run?
[Edited on 7/7/08 by David Jenkins]
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ditchlewis
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| posted on 7/7/08 at 08:43 PM |
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Problem solved
it was the pressure regulator, it was set closed. i took the thing appart and set the screw on the top and started the thing running. the pressure
guage shows a marked rise in the pressure so it is pumping fuel.
i was having a senior moment and forgot about the regulator. it is mounted upside down and when i losened the top of the spring fell out. is there
anything i.e. a seal or diafram that i'm missing?
ditch
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