Fuel pump problem

[Piscator]

I have replaced the following items on my S2 OTS fuel pump:- inlet and outlet valves, gasket between pump body and coil housing, diaphragm, points and points blade.

Installed on the car, it ticks away merrily, but delivers no fuel. The pump is bone dry so no fuel from the tank (which is not empty) either.

I suspect that the position of the points in their frame prior to screwing in the spindle on the diaphragm may be wrong, as I could make no sense of the Burlen instructions or the Haynes manual at this point.
Could someone please explain in simple terms what those instructions are trying to say?

Other possibilities:-
1. Does the pump need to be primed?
2. Does the relative position of pump body to coil housing matter?
Any advice would be much appreciated.

Thanks in advance

John L

[abowie]

Have you tried disconnecting the fuel pipe in the engine bay and running it to allow it to prime? This is sometimes necessary.

[politeperson]

Sometimes the pumps can tick away but deliver no pressure as they are out of adjustment.

Often people just replace them with new pumps, however they can often be brought back to life in minutes with little or no cost.

If you unscrew the 6 flat head screw and carefully separate the two pump halves, you will see the diamphram.

Unpeel it carefully from the outside and rotate it clockwise 360 degrees. Reassemble everything and see if the pumping action has improved. You might get some fuel pressure now.

There are two more adjustments near the points, youtube has a couple of good clips. Worth a go before you right it off.

[Piscator]

Hi, Andrew and James,

Thank you both for your advice, which is much appreciated.

As I had already taken the pump off the car (again), I decided to separate the two halves as per James' suggestion. I noticed that the points blade did not quite line up. On the car, the pump now works fine, except fuel is now leaking from both banjo joints.

I'll fit new 'o' rings and fibre washers. Dare I hope that that will finally sort it?

Thanks again, Andrew and James, for your help.

John