I have a 1300 1970 beetle,starts lovely but when I rev it ,it dies ! If I depress the pedal very gently is fine,after this first gentle rev I can rev to my hearts content. Then once settled I still have to rev gently for first rev. This is awkward when pulling out of junctions. I drove it for 2.5 hours the other day and still the same on a hot engine.
I have just done the valves,oil and spent hours adjusting the automatic choke,but did uncover something odd. Number 1 plug lead on the distributed is one place around,anti-clockwise.
Not a buggy problem I know but simular,any idea's folks ?

I had a similar little hesitation until i changed my inlet manifold  to a new one with new unblocked heat riser tubes, is ertical bit of your manifold that the carb sits on cold and condensating ? Mine was, i also as advised by many on here to get rid of pancake filter to standard oilbath type and fitted hot air tube uo to air intake. It took me a long time trying loads of other things before curing it. Good luck.

First check for dying on accelerating hard is engine turned off and look down the carb as you open the throttle a squirt of fuel should be seen from the accelerator pump jet. Diaphragms and springs fail and linkage can seize up but first take the top off the carb and check the jet is not blocked and fuel squirts from the hole the jet goes in.

I recently had endless problems with this - see my thread called one sooty plug.......  what carbs or carb are you running ?

Sometimes when I change up a gear there is slight hesitation, again when I first hit the gas. After initial pause exceleration is fine. It is original carb with oilbath filter and yes slight condensation on the carb. Will have a nose at the jet thing,but probably not till the weekend. When fiddling with the choke adjustment I could see fuel in it,but didn't note any squirting going on.
Cheers folks,big hammer at the ready.

I took the filter off today to look for any squirts,I pumped the throttle a few times and could see no squirts. The flap thing was closed so I didn't open it by hand cause I don't know what I'm doing and don't wanna break it. Fuel was present in there,so started it,first time fire up. Went to engine to pump throttle to look for squirts,I could not see any,but there was no hesitation on revving at all,seemed fine. I cleaned the filter and put fresh oil in it when I done the service the other day. I also checked the timing with a strobe in the week and the engine seems to like running timed bang in the middle of the 7.5 and 10 marks.
All seems funny but then I dunno !

You can hold the choke flap open by hand no problem or just leave the ignition on for 2 mins and it will open fully so you can look inside.

Where exactly is the squirt coming from ? There is a pipe at the back at an angle looking at you,also cut at an angle making it flat/level then 2 on top the flap much smaller at any old angle?
You'll get fed up with me soon !

Depending on carburettor there is a small brass or diecast pipe sticking into the center of the carb under the choke flap this squirts fuel down the side of the accelerator butterfly as you open the throttle it operates from a small square pump on the side of the carb held on by 4 screws which is connected to the throttle linkage.