I have a 82 Yota Pick Up. I did a carb swap from stock to Weber 32/36. The Weber came off of an Isuzu Pup i own at one time. My truck will start and idle perfect also drive good at slow speeds. Once I accelerate and running higher RPMs it acts like it is starving for fuel. It spits and spudder and will die if I don't let off the pedal. It also will back fire from time to time. I feel like it is getting enough fuel I have an electric fuel pump on the truck, New fuel filter. I'm starting to wonder if it may be a weak coil or something in the firing. Not sure. My other thought is maybe the carb is not jetted big enogh coming off the isuzu. Any suggestion will be helpfull. I am about ready to put the Stock carb back on and deal with it. Stock carb is wore out nothing works.

 

how big of an engine was the isuzu?

 

Do you have a fuel pressure gauge? The weber is supposed to have 3.5 psi of fuel pressure going to the carb, not enough will cause those types of problems.

 

I don't remember exact size of Isuzu motor. It was a small 4 cyl. I don't have a fuel pressure gauge but the stock carb did fine with the electric fuel pump. If I am correct it take more the 3.5psi.