Cutting out after driving for about a minute.
- Thread starter phil
- Start date
Hello Phil,
I think you will find that the Facet pump you have there is supposed to be mounted beneath the fuel tank, inclinded at a 45 degree angle such as in this photo of mine.
The Facet is a pusher pump, not a puller and needs to be below the fuel level in the tank.
Ron.
I think you will find that the Facet pump you have there is supposed to be mounted beneath the fuel tank, inclinded at a 45 degree angle such as in this photo of mine.
The Facet is a pusher pump, not a puller and needs to be below the fuel level in the tank.
Ron.
Ah, that explains my findings then. What to take the feed off or is it best to extend the wires that are already there? The pipes down there are all rigid steel with unions, so how do I tap into that? Sorry for all the questions, alternatively is there a push pull type pump available?
I'm not a fan of facets, Phil. Very difficult to order the correct pressure / suction combination and noisy as well. My preference is for these:
http://www.gowerlee.dircon.co.uk/HUCO.html
but I'm not sure how dear they are.
Chris
http://www.gowerlee.dircon.co.uk/HUCO.html
but I'm not sure how dear they are.
Chris
Hello Phil,
From the official Rover workshop manual,...fuel pressure 3.5 to 5.0 lbs/sq inch.
So you will need a pump that conforms to those requirments.
I agree with Chris in that the Facet pumps are not the quietest, but in my case I only notice it while at idle, and given I run two fuel pumps, I rarely need to switch the Facet on.
Ron.
From the official Rover workshop manual,...fuel pressure 3.5 to 5.0 lbs/sq inch.
So you will need a pump that conforms to those requirments.
I agree with Chris in that the Facet pumps are not the quietest, but in my case I only notice it while at idle, and given I run two fuel pumps, I rarely need to switch the Facet on.
Ron.
I honestly don't think that's an issue, Phil & Ron. The figure from the workshop manual is what the mechanical pump is capable of delivering, not what the carburettors require. Alao note that pressure is not the critical criteria - its flow! Provided the pressure will let the petrol reach the carbs - which 2.2psi will - then what you need to know is how fast the pressure drops off with increasing flow rate. We don't have that data for any of the pumps described be they HUCO or Facet!
My advice would be to mount a HUCO pump exactly where you currently have the facet.
Also, I suggst you check the petrol line route from the reserve tap to the pump. Ideally it should run across the back of the engine on the bulkhead, then out into the inner wing area through the large hole behind the steering idler, down the inner wing and back into the engine bay close to the headlamps and your new pump. This is to minimise the opportunity for fuel vaporisation which is a known issue with this installation.
Chris
My advice would be to mount a HUCO pump exactly where you currently have the facet.
Also, I suggst you check the petrol line route from the reserve tap to the pump. Ideally it should run across the back of the engine on the bulkhead, then out into the inner wing area through the large hole behind the steering idler, down the inner wing and back into the engine bay close to the headlamps and your new pump. This is to minimise the opportunity for fuel vaporisation which is a known issue with this installation.
Chris
That is very true Chris, the fuel pressure figures are indeed the range of pressures that the mechanical fuel pump can deliver. I imagine that the difference in pressures may be a result of the different size valves that were fitted to one pump or another.
Daniel Bernoulli (1700 - 1782) was a Dutch mathematician who studied amongst other things fluid dynamics. His principle states "where the velocity of a fluid is high, the pressure is low, and where the velocity is low, the pressure is high".
At first glance this may seem counterintuitive, but fluids behave in strange ways, and it is perfectly correct.
Provided the fuel pump can deliver the required volume so that the float bowls are always full regardless of engine speed or load, then the pump will meet the requirements expected of it.
Ron.
Daniel Bernoulli (1700 - 1782) was a Dutch mathematician who studied amongst other things fluid dynamics. His principle states "where the velocity of a fluid is high, the pressure is low, and where the velocity is low, the pressure is high".
At first glance this may seem counterintuitive, but fluids behave in strange ways, and it is perfectly correct.
Provided the fuel pump can deliver the required volume so that the float bowls are always full regardless of engine speed or load, then the pump will meet the requirements expected of it.
Ron.
Yes - on a previous car, but not run! My mechanical pump on current car is entirely up to the job.
One thought - have you asked the previous owner if he still has the mechanical pump? Overhaul kits are easy enough to source. Refitting it might be a simpler option.
Chris
One thought - have you asked the previous owner if he still has the mechanical pump? Overhaul kits are easy enough to source. Refitting it might be a simpler option.
Chris
Here you go Phil, an AC mechanical fuel pump. If you want one, here is your chance.
http://cgi.ebay.co.uk/ROVER-P6-3-5-V8-F ... 2564153cf4
Ron.
http://cgi.ebay.co.uk/ROVER-P6-3-5-V8-F ... 2564153cf4
Ron.
When you relocate the fuel pipe from the tap to pump, how do you attach the hose to the tap? Do you cut the original pipe? Would fuel evaporation make the fuel pump suck air? I can't see how it can as the pipe is sealed, I missed the advice about relocating the line. I plan on doing this tomorrow. I have established that the line becomes aerated after about 5 mins of running. After which the fuel level in the filter drops and bubbles start coming through. Then, it cuts out. It happens quicker when you drive. The fuel tap is dry, the lines are clear. I fitted a new pump that is supposed to suck as well as push.
It does sound as if the fuel is vapourising or moisture within is. Did you put some methylated spirits in your tank which will remove any water present? I mentioned this to you a few days ago. To me, it does not sound as if the reserve tap is the problem. The next time this happens, loosen the nut on top of the fuel filter. What happens when you do this? Do you hear anything? Tighten the nut and start the engine. Will it now start and run?
Ron.
Ron.