Oil and Ignition light came on!!

[Lingen]

Dave.
Me no understand What are the "Flats" referring to?
Mike.

[DMT]

Sorry, flat to flat = 1/2 turn. I have no idea where I got that from, but to my small mind it seemed logical.

[richardthestag]

You fuel pressure is adequate but most non-efi fuel pumps kick out 4.5-5psi.

Is your pump on the way out after all that?

[DMT]

Thanks Richard, now you mention it, it has started to click a lot more than it used to.

It is a genuine SU HP Electronic one bought from Burlen in Feb this year, Cost £150+

I will send it back for investigation.

Dave

[marshman]

You fuel pressure is adequate but most non-efi fuel pumps kick out 4.5-5psi.

Is your pump on the way out after all that?

Are you sure about those pressures Richard?? It may be true of some non-SU pumps but my Burlen (SU) catalogue lists ALL of the SU HP pumps as being 2 to 3.8 psi. LP pumps are spec'd at 0.75 to 1.5 psi.

More important is the flow rate - Wilf posted a thread about that somewhere, he was suffering fuel supply issues and found the flow rate from his pump was well down, a rebuild kit sorted the problem. In this case it is a new Burlen supplied pump so should be up to spec.

DMT - you said you recorded 2.7 psi, which suggests to me that pressure wise your pump is OK.

[DMT]

DMT - you said you recorded 2.7 psi, which suggests to me that pressure wise your pump is OK.

When I first fitted the pump I would get 5 or so clicks before they stopped. Then a click every 10 sec. Now it clicks 10 or so times quickly then a click every sec!!!

I am very sure I could get more than 3 psi and I adjusted the pressure down to about 3. Now the max I can get is 2.7.

One test I have not done yet though is check the pressure with the pipe removed from the carb and plugged.

Dave

[Goldstar]

My very first stag (which I still have and is waiting resto) had a Facet red top fuel pump which pushed out about 6psi so I def needed a regulator on that bad boy

[richardthestag]

My stag pump from Burlen pushes 4.5psi

[richardthestag]

Anything Facet will be 4-6psi

Says so on the packet, a lot of that facet stuff runs continuously so would need a return to tank pipe from the RH carb. Just like on the Range Rover Classic

[marshman]

Anything Facet will be 4-6psi

Says so on the packet, a lot of that facet stuff runs continuously so would need a return to tank pipe from the RH carb. Just like on the Range Rover Classic

But DMT has an SU pump from Burlen and the specs say 2 to 3.8psi. We are not talking Facet or any other "brand", efi or not. Unless you are after more performance, have different carbs, efi or what ever then I don't understand why people don't just stick with an SU. Properly serviced and looked after they last for years - I have a total of four here on different cars including my Stag, and never have an issue with them. Given that "anything Facet will be 4-6psi", fitting one would always leave you open to leaking needle valves. flooding etc. which then leads you down the road of pressure regulators, return pipes etc. Reminds me of the nursery rhyme "I know an old lady who swallowed a fly"

[Goldstar]

But DMT has an SU pump from Burlen and the specs say 2 to 3.8psi. We are not talking Facet or any other "brand", efi or not. Unless you are after more performance, have different carbs, efi or what ever then I don't understand why people don't just stick with an SU. Properly serviced and looked after they last for years - I have a total of four here on different cars including my Stag, and never have an issue with them. Given that "anything Facet will be 4-6psi", fitting one would always leave you open to leaking needle valves. flooding etc. which then leads you down the road of pressure regulators, return pipes etc. Reminds me of the nursery rhyme "I know an old lady who swallowed a fly"

Just an example that all pumps don’t push out low pressures I haven’t checked the unregulated Su pimp in my boot on the current car but I expect the PO fitted the filter king because it was pushing out too much.

[DMT]

I removed the fuel hose at the carb, and fitted it directly to my pressure gauge.

3 clicks and pressure went straight to 3.8 psi. Clicks stopped.

The pressure drop must be through the weber. If the float valve is letting by where is the fuel going? as I can see no leaks and there is no smell.

Is there an exploded view of the Weber 38?

Help I am at a bit of a loss.

Dave

[richardthestag]

With strombergs I would say that the excess pressure is forcing past the float chamber needle valve, which is then flooding the float chamber and overflowing through a) the jet hole and possibly b) the float chamber breather.

Unless you have any of those pesky pixies at work I would suggest that the same is happening with the weber.

Wonder if you have a pool of petrol sitting in the inlet manifold below the carb