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Author Topic: Howling 24v fuel pump.  (Read 4469 times)

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Offline jimbob

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Howling 24v fuel pump.
« on: October 05, 2013, 04:26:03 AM »
Hi all. Im looking for a bit of advice with regards the fuel pump im running in my 24v Capri. I have a standard 2 ltr fuel tank so as a result im running a swirl pot and the fuel filter in the boot. My problem is the pump feeding the injectors is spinning very erreticaly and absolutely howls when doing so. I mean its well audible over the sound of the engine idleing and the engine isnt exactly quite! It sounds like the pump is working extremely hard as if there is a partial blockage somewhere.  I had the pump in the boot, i then mounted it under the boot floor and then moved it up into the engine bay but it was still making a racket. I then assumed the pump was shagged so i bought a brand new Bosch 044 pump but this does the same as the old pump. On the end of the new pump is an attachment which is screwed into the inlet side and i think this is something to do with it.





I just removed this and screwed on a standard connection to which i could connect my fuel pipe straight onto. So my question is is it ok to do as i did and remove this connection as shown or does the pump need this connection to work?

Just to confirm i am using the pressure regulators on both in and return lines. Could one of these be faulty?

Any other advice or opinions are much appreciated

Jimmy...



Offline capri v8 driver

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Re: Howling 24v fuel pump.
« Reply #1 on: October 05, 2013, 08:27:13 AM »
Is this pump mounted in a big rubber and isolated from the cars body? Do you use rubber hoses to connect the pump or a steel line.

You want these pumps as close as possible to the fuel tank and filter and underneat (outside) the car.

Quote
On the end of the new pump is an attachment which is screwed into the inlet side and i think this is something to do with it.

Nope, its a 1 way valve to keep the pressure on the fuel system.

Quote
It sounds like the pump is working extremely hard as if there is a partial blockage somewhere

Check if the return line is not blocked. Did you use the original fuel lines and pick ups?

The 044 pumps are noisy. They are even more noisy if they have to work hard or do not get enough fuel.
greetz Paul.

Capri V8 Driver.

Offline Dave

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Re: Howling 24v fuel pump.
« Reply #2 on: October 05, 2013, 10:54:19 AM »

Only thing I can add to Pauls post is check & monitor the fuel pressure at the injector rail.

If it's erratic then your sucking air somewear or there is a problem with the tank pick-up.

That will make the pump noisy if its the case.
Dave

Offline jimbob

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Re: Howling 24v fuel pump.
« Reply #3 on: October 05, 2013, 13:26:01 PM »
So is it ok to just remove the one way valve and use the pump without it? Dave i like what your saying about it sucking in air because that is what it sounds like, but if it was sucking in air wouldnt it leak fuel aswell? I have had a good poke around and i cant find any leaks.

Offline capri v8 driver

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Re: Howling 24v fuel pump.
« Reply #4 on: October 05, 2013, 19:20:04 PM »
The 1 way valve is to keep the pressure on the fuel system, even if the engine is stopped. This way the pump doesn't need to build up pressure again from zero.

So dont remove it.
greetz Paul.

Capri V8 Driver.

Offline whiteestate

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Re: Howling 24v fuel pump.
« Reply #5 on: October 05, 2013, 22:41:51 PM »
So is it ok to just remove the one way valve and use the pump without it? Dave i like what your saying about it sucking in air because that is what it sounds like, but if it was sucking in air wouldnt it leak fuel aswell? I have had a good poke around and i cant find any leaks.

It depends on where the fuel pump is situated, could be that the outlet from the swirl pot is wrong as it will naturally have air in it have you any pics of your setup ?
"Praising what is lost makes the remembrance dear"

Offline Dave

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Re: Howling 24v fuel pump.
« Reply #6 on: October 06, 2013, 09:44:34 AM »
You probably do not have a leak mate but the pump will suck air if not plumbed up right like the pick-up from the tank etc, they shift so much fuel it actually becomes a problem if the rest of the system is not up to it. The pumps need to be as close to the tank as possible for a start.

If air is mixing with the petrol the pumps are as noisy as hell & it sometimes shows as erratic fuel pressure.
Dave

Offline capri v8 driver

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Re: Howling 24v fuel pump.
« Reply #7 on: October 06, 2013, 11:13:59 AM »
I never used a external swirl pot for my capri's.

For the capri mk1 /1.5 i modified the plug at the bottom of the tank as a output to a big fuel filter and than to the pump. I used the original fuel line as a return.

For the capri mk2 or 3, I used either a 2.8i tank (best option) or modified the tank by opening it and make a swirlpot in the tank.



Here is one for sale: http://www.ebay.co.uk/itm/Ford-Capri-mk3-2-8i-complete-petrol-tank-/161119412225?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item2583772001

It even has the original fuel pump.

I also modified the floor of a capri and used a escort fuel tank to use efi in a capri.

A other idea is to use a pump and swirl pot housing from a vauxhull omega, however you still need to do some moding to the tank.

As for the external swirl pots, with a small pump between the original tank and the pot. The little pump don't flow enough to keep up with the injection pumps. That's why I don't use them anymore. Its spending a lote of money and it doesn't work right.
greetz Paul.

Capri V8 Driver.

 

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