Pumps drawing excess current. I call  the pump is on its Final days.
 
Another possibility since it just started is that everything connected to that fuse somehow drawing too much and the pump just makes it go over.
 
 
 

It can be over 2A from stone cold, but this quickly drops under control from the ECU and heater resistance increasing with temp as it warms up.

MANDALAY
I call  the pump is on its Final days.  

 
Agreed , but it's not a lot of effort to verify for certain before dropping the tank - from all accounts a horrible job.

Ok, i am getting closer, and its not looking good.
Its not the fuel pump, and i will be more thorough from now on.
 
With just ignition turned on, i have excessive current through the efi fuse, but not enough to blow it.
I have the following unplugged now,
- COR
- Oxygen Sensor
- Fuel pump and sender
- Purge valve
- Fuel pump relay
- Idle valve
- Throttle Position sensor
With the meter reading across efi fuse connector, i am still getting a large current.
 
I do not have a vsv turbo valve installed (gen3 swap), and i cannot find any loose connector for it either.
Whereabouts should the vsv wiring be located on the harness?
The only thing i can unplug next is the ecu...
 
Edit: I unplugged the ecu, with everything else unplugged as above, and im not getting the high current.
When i reconnect the 22pin ecu connector and test, the high current is back.
I had a look at the ecu it looks fine, I can't see any obvious damage, or blown capacitors.
Its looking like time to get an auto electrician.

Ok, its fixed.
Thanks for all the help, seriously a big thanks!
In the process, i have removed a dodgy install of a bluetooth hansdfree kit.
And also found a gtech pro meter behind the dash, also removed.
 
One task left is to find the other end of that wire, which i think might be
connector IE3 behind the kick panel? Leave it to the weekend.