Electric fuel pump

[Artisam]

I have just sent my 1500 for its mot test and one of the reasons for failure was the fuel pump appears to be leaking very slightly. The pump is a 6 months old su fuel pump, I am not a mechanic and have been using it without a regulator, not sure if I need one? I am looking for a replacement to be mounted in the engine bay. I would be extremely grateful if somebody can recommend a suibtable pump?
Best
Sam

Here is a pump that I thought may be suitable?
http://www.ebay.co.uk/itm/360502806999? ... 97.c0.m619

[Dolly-Nut]

Regulator shouldn't be needed but some aftermarket ones provide an incorrect pressure, usually too high. Source an NOS / decent one and all will be fine. Overall mechanical is best imo, if you switch to electric then you have to worry about regulators, wiring/plumbing it in and blanking off the old pump.

[Artisam]

I have a mechanical pump that I have attempted to fit with a friend who is a bit more able with cars, we could not seem to get the arm to connect with the camshaft. The rods that the spacers slid onto were quite long and possibly preventing us from hooking the pump in? As the blanking plate is already in place I am wondering if it is just easier to replace the electric pump and avoid any unsuspected issues, however I am unsure what to replace it with
The pump I am looking at, only because I hope that it will be suitable for use without a regulator, offers 1.4psi and 120 litres an hour.

[Dolly-Nut]

It is a bit fiddly, just try different techniques. When being fitted correctly the pump should seem to push back.
Are you sure that your pump needs a spacer? Some do, some don't depending on the arm length, either way it should still work I think.
1.4psi may be slightly too low but you may just get away with it.
The popular electric pump is the Facet Redtop type I believe.

[Carledo]

1.4 PSI does seem a little low, ISTR the correct pressure is about 3PSI though there have been reports of aftermarket mechanical pumps making up to 6PSI and causing flooding problems.
Basically there are 2 types of SU type pump depending on where it is sited, "long suck/short blow" for front fitting and "short suck/long blow" for rear fitting. Now most cars that had SU pumps had them mounted in the boot, the notable exception being the Moggy Minor and most front mounted pumps sold are therefore to Moggy spec and are only really suitable for something with a Moggys piddling 34BHP and puny 11/8" SU carb.
Having said that, I personally ran a 2.5 litre Ford Zodiac on 3x1.25" SUs fed by an actual Moggy pump for some considerable time but it did get a bit asthmatic at sustained high revs!

Its not a good technical solution but I have in stock here a good used SU type pump which I removed from the front of my Sprint when the engine came out. I have no idea what pressure it generates but it ran the Sprint engine without flooding or starvation for the hour or two I had it running before I pulled and sold the engine. This SU pump is now redundant since the injected Vauxhall engine I am fitting needs a boot mounted high pressure job.
Empirically it should work for your car, yours for £15 including postage if you like!

PM me if you're interested, Regards Steve

[Artisam]

This is the pump that is currently installed ;
http://www.rimmerbros.co.uk/Item--i-AUF214
Rimmers have suggested that the pressure build up backed from the float chambers may be the cause of the minor leak at the top of the pump rather than a fuilty unit and that I may benefit from a regulator. This seems to be a rather low pressure pump but again not being mechanically minded I have no idea if this rings true?

[Carledo]

If that is the pump thats on it, its at the wrong end of the car! All the cars in that application list have the pump in the boot. Running it at the front will probably cause overheating and early failure and may even be responsible for the leak.

Steve

[Artisam]

That would certainly explain things. Thank you. I think moving it to the boot is the solution then, is this easily done? Probably very obvious but how can I run the power supply to the other end of the car and how do I address the gap in the line where the pump was?

[Oli_88]

A well insulated lead run inside the car is probably best to power it. Could run one underneath, but it'd look messy.

Gap in the fuel line, just put a new length of hose in the old pumps place.

[Dolly-Nut]

Could you not nick a power source from somewhere else, like the fuel tank sender?

[Carledo]

Could you not nick a power source from somewhere else, like the fuel tank sender?

Dont even consider this, theres about 6 reasons why it wont work! just take a feed from the unfused side of the ignition live fuse and run it back through the car following the main harness with cable ties at strategic intervals. You will also have to divert the fuel pipe from the tank into the boot and back out again, these pumps do not like being exposed to the elements! Another clever thing to do is to put a (possibly concealed) switch in the feed wire to the pump as a security measure!

Steve

[Dolly-Nut]

...just a late-night thought.

[Artisam]

Ok thanks guys, will try this tomorrow.

[Artisam]

Can anyone tell me what side the main harness is on?
Best
Sam

[Carledo]

The main loom, such as it is, runs along the inside of the nearside/LH/pasenger side sill. It joins to the dash loom just above the N/S/F cardboard kick panel (best to remove this, its dead easy) then lift out the front foor carpet and peel up the inner sill cover carpet a bit and you'll find it.

Steve