Long Range Petrol tank access issue

[dom14]

Another thought. when you connected the fuel pump to power and it flooded, I wonder if the pressure needed to be reduced by the fuel return solenoid?

Yes, the thought has crossed my mind. But, I followed your RB30 thread to get an idea about the way the fuel return solenoid works.
I guess it kinda possible 'cos fuel return solenoid may come to action bit too late to stop the flooding.

BTW, flooding only occurs if i do the following actions in below order(afaik).
1) I leave the ignition on first
2)I connect the make shift wire to the FPCU wire that goes to the fuel pump(green with red trace).
3) I connect the other end of the make shift wire to the battery positive.

The order of the 2 & 3 won't matter obviously.

If I do the 2 & 3 first and then turn the ignition on, flooding of the carby apparently won't happen. (I can see the petrol still completely
fill the float chamber, but I was still able to start the engine. If I do 1 first and not quick enough to start the engine, the flooding happens way too much and I can't start the engine until I clear the flooded float chamber.

I must admit, I haven't properly checked the function of the fuel return solenoid.(it slipped my mind).
I think it's about time I do that as well.

The thing is whether I high rev or low rev under the bonnet, the float level stays in the middle when I cold start the engine. It only start stalling(and unable to generate enough power) when I start driving.

None of the above problems exist with LPG.

That's why I thought to start with the tank end and rule out all the problems.

I most certainly need to check the fuel return solenoid & carby properly.