When that happens have you tried to disconnect both hydraulic control valves - solenoids and see if that will resolve the problem? If it does you have 2 solenoids which needs replacement.
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I just sent you reply in message. When I want to report spam and compose the message when I press Send button I receive notification that message was not sent. That is all. I did not receive any reason why. This is not the first time. This is happening since forum SW change.
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Starting and running for 2 seconds looks like alarm ecu is not speaking with engine ecu.
What system do you have Lucas or Pektron?
As asked previously - do you have F or TF and what yearmof production?
Is your fob square with 2 buttons or oval one?
Can you lock and unlock your car with the remote/fob without a problem?
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One more note: when you are testing this earth to the pump it is not important to test Ohms but also power/voltage on that same earth connection. Voltage can be passed from bare or broken wires to earth point and thus making earth connection not 0 Volt but with some higher amount and by that pump might not work.
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One more tought on your fuel pump: I see that you brought bypassed 12V power to the pump. But have you brought independent solid earth connection to the pump as well? I would try to bring 12V and independent earth connection to the pump in order to fully test the pump and see if it is working or not.
If the pump is working, then your problem might all the time be in broken wires at the hinge in the boot.
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None of wires connected with the engine management goes through this bit of loom, however some other wires passing through this bit of loom share the same ground point as engine management circuit. If these wires passing through hinge loom have ground wire compromised, and since one of these wires is ground wire connected to same ground point as engine management circuit, by that connection engine menagement can also be compromised.Wrt to your second question, the relay pack for my car (an early one don't forget, '96, chassis number less than 1900) has no discernible digital content whatsoever.
Roverlike: yes hinge wires, I was aware of this issue and have not checked yet. What connected with the engine management goes through this bit of the loom?
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There is no any sensor providing info to engine ECU regarding fuel presure. On ignition engine ECU will fire fuel pump a fraction of time to build up a pressure in the fuel system to be ready when you turn starter on. Engine ECU will fire fuel pump to build presure by default.
Fuel pump is lubricated by fuel, so you should not let fuel pump to starve from fuel in the tank.
It is alittle bit odd that you do not have 12V with multirelay attached. Have you checked that you have clean contacts on the relay and multiplug?
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Not all cars are made in same way. Have you seen anybody advertising clock chnage for MGTF specificaly?What puzzles me is that if it is so difficult to do how come it has become not uncommon to see that service advertised on lamp posts etc.
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Without desoldering chip from instrument cluster, reading it, finding where mileage is written, programming new eprom chip and soldering it back to imstrument cluster, you will not be able to change mileage.
Pulse generator will help you to clock-up the mileage but you cennot clock-it-back.
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The easiest method would be to look if you have connectors for front fogs behind front bumper and by multimeter see if you have power on them when switch is pressed.
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Maybe this thread could help:
https://www.the-t-bar.com/forum/roverlike-s-guides/97846-mg-f-tf-fuse-relay-listing
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