Back to the gas tank
Ah, so a few weeks ago, I replaced my sending unit, and while I was at it, I replaced the fuel pump and the flex pressure line.
Now, the car needs to turn over for about 45 seconds before it starts.
First, a 30 second key-turn, then a 15 second one. It seems to start faster if its been running.
I suspect the new fuel pump is allowing fuel pressure to leak back into the tank, and/or the new pump can't pressurize the fuel lines fast enough. Nothing else has been changed on the car.
There are no visible leaks. The car used to start immediately.
I suspect I will be dropping the tank and putting a (second) new fuel pump in during the next few days. Luckily, its been nice and everything should still be a bit loose from the last adventure.