hey im new here and i need help. i have an 86 chevy k10 305 with a q-jet. i am having serious problems with it right now. at wot it misses right before it shifts, when its hot and i shut it off it starts up but dies after about a block and doesnt get fuel when cranked after about 10 mins it starts back up with the help of me pouring fuel in the carb. i changed plugs, vacuum lines, and checked all the electrical. i rebuilt the carb and it is together correctly. any ideas or answers for me would help greatly, im chasing my tail! thanks for your help.

 

fuel pressure mabey?
i had kinda the same thing one time. it was some kinda vapor lock. i used a plastic carb spacer and put my return fuel line back to use.

 

I had a 1987 blazer did the same thing I put a fuel pump on it di d fine for 3 yrs then same thing.