Originally Posted by SCX358G
Is it normal for the electric pump on a Plus 8 (1970s) to tick all the time? I can understand why you might hear it ticking/pumping when you initially turn the ignition on and the carburettor/fuel lines etc are filling up, but I would have expected that to stop after a few seconds (without actually starting the engine). Or does the pump tick (ie run) all the time even when there is no actual fuel flow into the carb? (There is no return fuel line from the carb).

smile Not an EFI question, but I'll give it a try.

Facets and SU pumps usually exhibit different signs of distress, whether mild or severe. Some Facets are said to tick continuously, but I have never figured out whether that is because the owners have NEVER remedied some problem and just live with it forever constantly, a Morgan owner's tradition. wink

However, the image you posted looks remarkably like an old SU electric pump. (I posted an example of an older one below)..which is also more likely for a UK mog of the day. The USA's FACET only began began in 1976 and the UK was a big market for a while after. A ticking su carburetor normally means a leak OR another problem, that could cause a similar condition. Do a simple test. While the pump is ticking at you, clamp the fuel hose anywhere between the pump and the carb and see if the ticking stops. If it does, you will have diagnosed the pump as ok, but not the site or cause of the leak. But you can move on from there.

BTW, while you are in this area, check if you have an inertia switch wired on the pump power line. Mechanical pumps stop with the engine but electric pumps keep feeding the sparks and/or flames with gusto. Been there and I dislike it.

gmg

[Linked Image]

Last edited by gomog; 24/11/23 11:17 PM.