Won't start help needed urgent

[standardlincoln]

So my car turns over but no fuel is getting to the carb( standard 8 ) cleaned out the float bowl filter thing checked all the pipes nothing at all am I missing something really silly ? The fuel pump is in the engine bay bottom of engine bay on the right ? What powers this now I've emptied the pipes ive used the primer leaver but still nothing through to the carb

[Eternal Optimist]

The fuel pump is mechanical. It has a lever sticking out of the back on it that is pushed backwards by a lobe on the cam and forwards by a spring in the pump body.

The lever pushes a diaphragm up and down creating a pressure then a vacuum, and two valves make sure that the pump alternately sucks from the tank and pumps to the carburettor. The primer pumps the diaphragm in the same way.

Unbolt the pipe that runs to the carb and get someone to turn the engine over on the starter. If fuel is pumped out the problem is between the pump and the carb. If there's no fuel, take the pump off. As you move the lever at the back of the pump, you should feel a slight vacuum on one side of the ports and a slight pressure on the other.

If there's nothing, take the glass cover off and check the gauze filter's not clocked. Then unscrew the two halves of the pump and check to see if the diaphragm is torn. (Likely of the car's been stood for a while. Try sucking and blowing on the entry and exit and see if the one way valves work. You can get an overhaul kit to replace the diaphragm, valves and gaskets.

[standardlincoln]

So the fuel pump won't work unless he engine is running I've cleaned it out and checked the gauze I've taken the top half off ( the bits the pipes go into and cleaned it out and put back together when I push the primer down with lid off I hear a suction noise but hey is no fuel getting from the pump to the carb

[johndoc]

It is possible to set up a temporary fuel supply to the carb, for troubleshooting purposes.Get a small funnel, and attach a pipe to the bottom of it, other end of the pipe to the fuel inlet of the carb. get someone to hold the funnel above the carb, or securely suspend it there. Fill the funnel with clean fresh petrol, and try to start the engine as normal. If it doesnt sttart, you have another issue, probably carb related, but ccould be ignition. if she does start, see if the fuel pump is supplying a good strong "spurt" of fuel on each stroke. For safety, put the old fuel pipe into a glass jar, to observe this.
A tank that has stood empty for a long time will have a surface of rust inside, which the fresh petrol washes into a brown sludge, which will block the fuel pump. If has stood with old petrol in it, the fuel can turn to jelly like sludge, same effect.

[misterm]

Fuel is getting to the pump OK, is it?

If not, is there a vent in the fuel cap? Try again with fuel cap loose.

Try blowing back down the pipe to the tank as well to make sure there is not a blockage between the tank and the pump.

[standardlincoln]

fuel is getting to pump as with primer pumped the bowl fills so no probs there I will use easy start to the carb to make
Sure no other issue so it's basicly not pumping from bowl to carb

[johndoc]

Which bowl? The glass bowl on the pump, or the float bowl in the carb?

[magnet]

Perhaps something is getting lost in the translation here! Not wishing to be critical, but constructive - please do not disconnect the fuel output pipe from the pump and then operate the starter motor. Not unless someone wants to run the risk of setting said vehicle and garage on fire - all electrical devices including starter motors have the potential for creating sparks.

[johndoc]

Its perfectly safe to do so, if the pipe end is put in to a glass jar. The petrol will not vapourise enough to cause a flamable mix with fresh air doing this. If it did, every petrol staion in the world would be blowing up on a daily basis.

[standardlincoln]

Stage further fuel spits from pipe carb end just not getting into carb

[standardlincoln]

Also everyone keeps saying glass bowl on pump I'm sure mine is metal so maybe a new pump gas been fitted in its life time

[markaren76]

Sounds daft but has anyone tried the simplest thing out. If fuel is not getting to the carb the first port of call should be to take the fuel filler cap off the tank. If the breather is blocked it may cause a vacuum preventing the pump working. It's such a common thing on older cars

My fuel pump is metal and the fuel cannot be seen You have to unscrew the top to see the filter.

Good luck

Mark

[johndoc]

You can get glass or metal bowls. When you say fuel spits from pipe, is it strong? The manual gives "strong well defined spurts every power stroke of the engine".
If it is strong, next step is to take the top off the carb, but don't dismantle anything at this stage. blow in the petrol inlet pipe, while gently moving the float or needle valve up and down. This should allow air in, then stop it when the float/valve is up. If you dont get air in while the float or valve is down, there is dirt or sediment in the needle valve.

[johndoc]

I hope you get her sorted the easy way- but in the case of my 39 Flying 10, the fuel pump was working, but was weak, it turned out to be wear on the operating lever, giving a reduced stroke. I ended up removing the mechanical pump completely, and blanking the hole with a plate.-

See pic-
www.dropbox.com/s/lab5x3w1bx1lhec/photo%2011-04-2015%2019%2030%2055.jpg?dl=0

I then put an old water trap/sediment bowl(glass, as it happens) on the inner wing(bottom left). The pipe from the tank goes to this. The outlet of this goes in to a cleanable glass inline fuel filter. This then goes in to a German SU copy electric fuel pump on the bulkhead.This is plastic bodied, so double insulated, so can be used on positive or negative earth. This feeds clean,water free fuel to the carb. It has several advantages, fuel strength and quality can be clearly seen, the pump can be seen and heard working, and it primes automatically when the ignition is turned on.
All completely reversable, and cost about £40 to do, using bits left around the shed.

[peter]

www.dropbox.com/s/vmjldoogy9xfj0w/StandardCarbs.ZIP?dl=0

see above link for fault finding, manuals etc for carb. Unzip into directory and see standardcarbspecs.htm.

Check gauze filter in carb banjo joint. may be blocked.

Check float and needle valve operation. Float or needle valve may be sticking.

check vent hole is clear at back of float bowl. blockage causes back pressure.

check not got air lock from tank - remove/loosen tank filler cap. if then works clean filler cap vent hole.

check for blocked jets. but pump should fill carb bowl if this is the problem. just no fuel to engine.

If fuel getting to carb inlet side - pump operation/diaphram fine.


Johndoc : fix for low pressure from pump is to fit thinner gasket between pump body and engine block. Thus get longer stroke of operating lever.

pump is metal, carb is metal. some people fit a filter with a glass bowl between the pump and carb as it shows pump is working and provides better filtering than the one at the inlet side of carb. Though can lead to pressure being lower at carb.