neil
Rover Rookie
Posts: 22
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Post by neil on May 13, 2013 8:09:47 GMT
I gave a 1961 3 litre with 2 fuel pumps does anyone run theirs with more modern pump than the su's that are fitted?
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Post by stantondavies on May 13, 2013 16:02:32 GMT
No, very happy with the standard set-up which gives you a spare. Serviced mine 70,000 miles ago and have had no trouble at all. Some P5B owners have replaced the mechanical pump with Facets.
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Post by Phil Nottingham on May 13, 2013 16:54:03 GMT
I prefer the standard set up too - why change the original setup. The twin pumps are very reliable and easy/cheap to service too.
A Facet type would work OK though
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Post by puffernutter on May 13, 2013 20:56:08 GMT
After the fire, I changed my mechanical pump for a Facet, if nothing else, so that I can switch the fuel off if it happens again. BUT!
Recent runs have shown that somewhere I'm not getting enough fuel to the carbs, such that if I accelerate slowly, everything is OK, if however I accelerate hard, the engine stutters at about 3000rpm and wont go past it.
My assumption is that with the hard acceleration I've drained the float bowls and the pump wont keep up.
Has anybody else had this experience? I thought the pump was large enough to supply the fuel it would need, but maybe I was wrong, or is there any other change (restrict the bleed off?) I need to make to the set up.
Suggestions (clean!) please.
Cheers
Peter
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Post by stantondavies on May 13, 2013 21:33:55 GMT
It may be that the pump is not man enough for the job or you fitted the wrong type, but this topic has been covered before. Try a search,
Check that the tank is vented adequately and that you are not getting a partial vacuum leading to fuel starvation.
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Post by johnwp5bcoupe on May 14, 2013 7:20:51 GMT
It may help if you give what number pump you have fitted and where in the system it is?
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Post by Dean Hovland on May 14, 2013 7:56:05 GMT
After the fire, I changed my mechanical pump for a Facet, if nothing else, so that I can switch the fuel off if it happens again. BUT! Recent runs have shown that somewhere I'm not getting enough fuel to the carbs, such that if I accelerate slowly, everything is OK, if however I accelerate hard, the engine stutters at about 3000rpm and wont go past it. My assumption is that with the hard acceleration I've drained the float bowls and the pump wont keep up. Has anybody else had this experience? I thought the pump was large enough to supply the fuel it would need, but maybe I was wrong, or is there any other change (restrict the bleed off?) I need to make to the set up. Suggestions (clean!) please. Cheers Peter It could be an air leak , check if theres any bubbles in your fuel filter and check all your jubilee clips are tight. Just guessing im not a mechanic . |
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Post by Chuck Berry on Jul 15, 2013 22:21:07 GMT
I may have the wrong end of the stick here, but I was under the impression that the second pump was for the reserve only, dragging fuel from a lower level in the tank?
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Post by bissmire on Jul 19, 2013 8:37:25 GMT
Very good question.
My electric pump is on the blink at the moment, tho when I switch the reserve pump on ( done on my car by little switch under dash) car runs amazingly well, like i've just added 30bhp...Question is, can I run my car like this permanently.
Rovering.
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Post by johnwp5bcoupe on Jul 19, 2013 8:41:33 GMT
Very good question. My electric pump is on the blink at the moment, tho when I switch the reserve pump on ( done on my car by little switch under dash) car runs amazingly well, like i've just added 30bhp...Question is, can I run my car like this permanently. Rovering. No reason why not apart from possibly running out of fuel! keep a can full of fuel in the boot or better still investigate why the fuel is possibly being restricted? |
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Post by bissmire on Jul 19, 2013 9:07:31 GMT
Hey John,
Fuel is being restricted by faulty electric pump in the engine bay.
I was under the impression the big pump atop of the petrol tank was the reserve pump, as on my car it doesn't run till I flip the reserve switch(under dash).
If I can run the car off the "reserve pump" indefinitely, is there any need for a new electrical pump upfront ?
running out of fuel ?
Reserve petrol tank is feed by main...so as long as I have a tank of gas, I'm good to go right ?
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Post by johnwp5bcoupe on Jul 19, 2013 9:24:28 GMT
I am not a 3ltr expert I had one in 1970! As far as I remember you have two pumps in the boot the one nearest the rear is the main and the one towards the front is the reserve so I am assuming you have replaced the main with a Farcet of similar pump in the engine bay, or have you a double pump? Is the original still in circuit by that I mean are you pumping through it? Are you sure the front pump is faulty or is the pickup partially blocked? You will do no harm running on reserve permanently apart from you have the possibility of running out of fuel  |
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Post by Chuck Berry on Jul 19, 2013 10:03:38 GMT
Very good question. My electric pump is on the blink at the moment, tho when I switch the reserve pump on ( done on my car by little switch under dash) car runs amazingly well, like i've just added 30bhp...Question is, can I run my car like this permanently. Rovering. That appears to me that the fuel is now being delivered at the correct rate, if the car is running better. SU type or electric pumps do have a gauze filter in them and could be clogged, or more likely, the points are dull and need cleaning and setting. Try the old pump direct from the battery and check the "clicking" rate. This should give an idea if the pump is running correctly. It is a bit of a fiddle but I think the only way to determine the workings of the pump. It may also be worth while check any fuel lines for kinks, and more importantly check the rubber hoses. Modern petrol does degrade the hose internals and could have allowed the inner coating or hose component to cause a blockage. Hope this helps |
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Post by bissmire on Jul 19, 2013 11:15:21 GMT
Cool, the clicking from the electric pump is same as ever it was...So maybe a clean out could be in order.(looks like a cheap item tbh)
Fuel circuit:
Running through the main pump, but cant feel any vibration from it / not working...So I assume the car was relying on the electric up front...
thanks guys, appreciated the help.
Its a 3.5 V8 btw
JB
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Post by johnwp5bcoupe on Jul 19, 2013 12:29:30 GMT
Cool, the clicking from the electric pump is same as ever it was...So maybe a clean out could be in order.(looks like a cheap item tbh) Fuel circuit: Running through the main pump, but cant feel any vibration from it / not working...So I assume the car was relying on the electric up front... thanks guys, appreciated the help. Its a 3.5 V8 btw JB I wondered it the old pump was in line it possible the filter may be blocked in the old pump restricting the flow the fuel line wont be a problem as they were plastic (usually break rather than block) I would check the filter first if it's the two single pumps it is the nut under the pump, if it's the twin you will have to remove the body to get at it, good luck keep us informed  |
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Post by bissmire on Jul 19, 2013 13:56:30 GMT
Thanks will do !
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Post by bissmire on Jul 22, 2013 10:45:35 GMT
Went round the garage to take a look at this electric pump, on further inspection the pump is all over the place...Very loud clicking noise then none at all..Changed the petrol filter as it looked a little dirty just to see if the pump was being over worked. No change at all. Quick look on the inter-web reviled various pumps up to the job...this being one of them www.burtonpower.com/parts-by-category/fuel-system/fuel-pumps-carburettor/facet-electric-fuel-pump-kit-silver-top-4-4-5psi-fac476087k.htmlI've read the SU's need 3 psi this unit is 4 to 4.5 Will I need a regulator with this pump or is it plug and play... To be honest I dont really want to get to involved or over spend...A straight swap is what i'm after...Any ideas chaps ? thanks 1968 P5B V8 |
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Post by barryr on Jul 22, 2013 22:58:28 GMT
J R Wadhams do a kit if you want an easy way. I'm still running manual pump but I'd probably go this route when time comes. There are lower pressure facets for p 5 b on eBay as well...
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Post by bissmire on Jul 23, 2013 8:12:27 GMT
thank you
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Post by norvin on Jul 23, 2013 8:50:27 GMT
Some of the Facet pumps are very noisy, I would service the pumps you have as they are usually reliable, I rebuilt the SU on my Rover P4 over 20 years ago and it is still working ok, I suppose now I have said that it will pack up.
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Post by bissmire on Jul 23, 2013 22:07:01 GMT
The electric pump up front is a sealed unit unfortunately...I've ordered a FACET Solid State Fuel Pump 40105 3.0-4.5psi and a Sytec Flo-Pro Fuel Pressure Regulator Carburettor 1-5psi
Which I'm hoping will do the job. I shall update when received and fitted.
thanks for the help.
JB
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Post by norvin on Jul 24, 2013 15:05:54 GMT
I have a Facet 40105 on my 1968 V8 and this pump is very quite, I do not have a pressure regulator.
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Post by johnwp5bcoupe on Jul 24, 2013 15:25:31 GMT
I have a Facet 40105 on my 1968 V8 and this pump is very quite, I do not have a pressure regulator. Same here Brian but we have the luxury of a Spill Return the original single SU pump was rated at 2lb to 6 lb so I would have thought a regulator was unnecessary with that Facet pump, plus it would save a few ££££'s |
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Post by bissmire on Jul 24, 2013 20:35:17 GMT
Well, to be honest couldn't be arsed to get the new pump on only to find out I have too much pressure. Thought I'd try first without the regulator then if I needed it, Robert's your father's brother...
thanks for replying.
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