Neglect

[Kwacker]

Wrote a long message earlier but tech failed.

So long story short

Car sat a long time, battery died, new battery. Started fine, wasn’t driving it how a few weeks. Disconnected battery. Now fuel pump won’t prime. Checked relays, tried inertia switch. What am I missing?

Kwacker

[hidetheelephants]

Is there fuel in the tank?

[Belle427]

Immobilisers are normally always the problem, do you have the Meta system?
If so I would get it bypassed immediately, its a heap of junk and the upgrades are not much better.
You could try battery disconnect a few times to see if it resets.

[sixor8]

I've had 2 x immobiliser failures in a Chimaera and a Griff. In one, squeezing the immobiliser (more accessible in a Chimaera) would get the fuel pump to prime. On the other, the car would occasionally fail to turn over, even when cold and then the whole car cut out at 50 mph.

With my current Griff, I bought a plug-in replacement alarm / immobiliser system from Abacus (HPA Evo) and it has been perfect since 2022 so I wouldn't say they are all poor, mine hasn't been. It means I retain the remote unlocking / locking synchronised with the immobiliser.