Spits and sputters?

Here's the issue the truck idles GREAT but when it is under load (driving down the street) it spits and sputters like it isn't getting any gas, it idles kinda high aswell. But when I floor it the truck takes off like a raped goat. I've tryed running fuel cleaner in some hope that might help but NO LUCK I think that made it worse, I'm running mid grade gas aswell. It doesn't blow any color or kind of smoke it just had a tune up Cap, wires, rotor, plugs, fuel filters, fuel pump, air filter, and I think the valves were just adjusted to I'm not sure. So what could my problem be? If I need a new carb anyone got a Weber 32/36 to go on the Offenhuaser intake I got with the truck PLEASE help!!!! Truck info 84' Mazda 2.o liter 5 speed

Thanks
Le

quick shot at it would be check your fuel filter...see if it is clogged

I had same issue I replaced the fuel pump, filter did a tune up nothing worked. Then I got a Weber 38mm and havent had the problem since.

That's what I figured time togo scaveneg my j/y's again for a Weber thanks guys.

might have a leak in the vaccum advance line from your dizzy to the carb.

carb is dirty

try the fuel filter this happend to mine before when i have the 2.2 changed the filter and ran prefect agian...

seems the most common problem with this carb is tha accelerator pump. i always say this. similar problems same outcome the accelerator pump is dirty/sticky something along those lines.