He's guys. My first post here. But not my first bullnose f150. Problem I'm having is my truck will idle good. But will hesitate when I start gi6it throttle and then take off. After running for a mile or 2 it will start spitting and sputtering with any amount of throttle unless I barely push the pedal. If I stop for a few minutes and start off again it will repeat all over again. Whether I stop and turn truck off or stop and leave it running. I've installed an iffy c intake with efi manifold. Has an edelbrock 4 barrel carb with a hei distributor. I also changed plugs,fuel filter, and fuel pump. Any help would be greatly appreciated. I've been fighting with it for a few weeks

 

I'm thinking the coil on the hei may be crap

 

Anyone have any ideas

 

Found my problem to be vapor lock. Any suggestions to fix?

 

I have a few questions, let me start with why you think its vapor lock?

 

After running I could see the fuel bubbling in the filter. I also had another issue. The line coming off the tank was pinched almost shut. Fixed that by dropping the tank. For the vapor lock I wrapped my fuel line in a heat sleeve and installed a electric fuel pump. Seems to be fixed.

 

It was most likely a bad fuel pump. Glad you git it going