Slightly odd one this, but I'm doing a fair amount of engine work at the moment - swapping out a leaky water pump (of course), changing spark plugs, and I figured while I'm here I'm going to swap over what I suspect is a supercharger isolation spring coupler on it's way out.

in order to do this I need to depressurize the fuel system. The workshop manual states that the way to do this is to remove the fuel pump fuse and run the engine until it stalls, and this is obviously the simplest and the safest method.

However, I have various parts removed from the engine at the moment so I can't do this.

How long does the system stay pressurized for after last driving the car? I'm wondering if the pressure will be lower or gone now (given that you can hear the fuel pump prime before the engine starts if it hasn't started in a while), and I can just remove one of the high fuel pressure line connections - I'd rather remove a bolted banjo one rather than a quick-connect one as it's easier to slowly control the pressure release.

Or is this not even going to be a problem as the engine hasn't run for a couple of days?

 

I'd cover any line with a towel while I break it open. Either side may still be pressurized, but the volume of fuel is low so the leakage should be minimal..

 

It's not going to spill much fuel. Don't worry.