Truck struggles under acceleration

[haruman]

I'm thinking that the accelerator pump or nozzle has failed. With the engine off and the air cleaner removed, if you look down into the carb while opening the throttle, do you see a stream of gas from the accelerator nozzle? If not, the nozzle is clogged or the pump has failed.

I see a dribble...

[FMS88]

I see a dribble...

I think that's the issue. A dribble isn't sufficient so it's starving for fuel when you try to accelerate. I'm not familiar with the Weber's internals, but another member or an internet search should tell you how to access and fix the accelerator pump circuit.

[haruman]

I think that's the issue. A dribble isn't sufficient so it's starving for fuel when you try to accelerate. I'm not familiar with the Weber's internals, but another member or an internet search should tell you how to access and fix the accelerator pump circuit.

Just ordered the part, looks pretty easy to swap. 4 screws and it's easily accessible, shouldn't take but like 10 minutes...