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Gordon
United Kingdom
693 Posts |
 Posted - 23/06/2008 : 21:06:20
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David,
In am earlier post on this topic you said "As I said in the earlier posting - I always switch the fuel pumps off and run the engine for a few seconds to empty the float chambers prior to cutting the engine."
If you have a fuel tap as you suggest I would have thought that all that was required before switching off the ignition is to close the fuel tap and run briefly then turn off the ignition. ie there should be no need to turn the pumps off first unless they are not wired through the ignition switch? Or am I missing something?
Regards
Gordon
Gordon |
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David Allison
United Kingdom
665 Posts |
Posted - 24/06/2008 : 09:06:59
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Gordon
The fuel pumps are wired through the ignition circuit but I have the facility to cut one or both pumps while the ignition is on.
This also allows me to cut fuel and prevent the engine wetting a plug in traffic.
The fuel taps on the NA are under the floor - although it can be done I prefer not to grovel around on the floor looking through the hatch in the floorboard for the fuel tap while I am driving.
Switching off the fuel pumps justs before cutting the engine gives me enough time to turn the fuel taps to off before the fuel lines refill with fuel.
Hope this answers your question.
Regards David |
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Gordon
United Kingdom
693 Posts |
Posted - 24/06/2008 : 19:25:16
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David,
Thanks for your response and clarifying the issue.
Regards
Gordon
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Peter Green
United Kingdom
1682 Posts |
Posted - 25/06/2008 : 12:25:08
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Rodney
Going back to your original posting it does sound as if your car has dirt in the petrol tank and some of this is getting into the carburettor and causing the ball valve in the float chamber lid not to seat properly.
Does the petrol tank have its original petrol pick up unions? If so the æreserveÆ union (which picks up petrol from the bottom of the tank) should have a very fine gauze on it which will stop any dirt getting into the fuel lines and the æmainÆ union (which does not have a gauze on it) should protrude at least 2ö into the tank and this is sufficiently high to stop any of the dirt in the bottom of the tank getting into the fuel lines. The petrol should also go through two other filters before it gets into the float bowl, a very fine filter in the fuel pump and a not so fine one in the float bowl lid.
If the petrol tank does not have its original pick up unions I suggest that you do fit an inline filter, they are not expensive and come in many shapes and sizes.
An inline fuel tap is a good safety measure for all cars but especially so for cars with front mounted superchargers, as yours, because the carburettor is lower than the fuel in the petrol tank.
Peter
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Rodney Collins
United Kingdom
424 Posts |
Posted - 26/06/2008 : 11:44:07
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Peter
I think you are right in you assumption, I am sure my car has the original unions to the petrol tank, the problem i incured (for the 3rd time) clears when I blow air through the ball valve, as I said in my original posting I had quite a lot of sediment in the bottom of the float chamber. Paul Duncombs email me re the switch over valve from main to resurve saying that the Barry Walker O ring type has a point where the fuel is cut off, I have one of these valves so I can use that to start with to switch the fuel off when leaving the car for any length of time, I will also take your advice and fit an in line filter and monitor the amount of sediment being drawn up from the petrol tank. Thanks for you imput.
Regards Rodney |
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John K
New Zealand
5 Posts |
Posted - 30/06/2008 : 09:16:44
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Hi Kevin
Re solenoid valve. Sorry for the late reply, have been away from the computer for a couple of days.
Try Googling "Solenoid Valve" It will probably link you to a valve manufacturer called Parker Lucifer. + others. For petrol use you need a valve with a Viton seal. In NZ we would buy them from an enginerring supply company that specialises in valves.
Hope this helps.
John
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