@ mohsin bhai
Oh the discussion on the VW:
Some things to check. Before going on to the carb (unless very sure it was a flooding problem) do try to swap out the ignition coil if you have a spare one around.
The symptom may be caused by a bad coil which heats up after a short run. Local mechanics eliminate this while testing by keeping a wet cloth on the coil. We can try by swapping it with a good unit.
Carbs flooding up may be due to a faulty needle valve as kruxing already mentioned. A sticking needle valve may be temporarily coerced into submission by a sharp whack on the float bowl with a screw driver handle.
I have personally experienced carb flooding (when my red VW used to have the original 28 PICT Solex....similar to the 30 PICT Solex on your car) both due to a sticky needle valve and also when the carb was dirty.
There is a long brass tube having a tiny bore screwed into the lower half (called the air correction tube). If this has crap stuck in, it can effectively siphon off fuel from the float bowl into the venturi, causing flooding.
You can try out a coil swap and/or a good clean of the carb with generous amounts of Carb cleaner.
Or you can go the route Romano preaches. The new/rebuilt carb.
One more essential check is to rule out 'vapor lock' in the fuel lines. This is caused when fuel lines pass too close to hot objects in the engine bay. Typically the car restarts easily after beign allowed to cool down. A re routing of the lines down a safe path is important to prevent vapor lock and a potential fire hazard.
Im sure you know most of the tech details outlined above in much greater depth. Just wanted to mention them here so you can check them out.
Best regards.
PS: Awaiting you to join the VWCOP thread soon!