Originally Posted by
adc1488 Think it will help any??? Lol
I would put money on it. Replace both lines with the size Unijabnx2000 said.
To better understand, there are two primary types of fuel systems. Dead head and return. Dead head is when the fuel run to the fuel rail/ carb and the fuel pump limits the fuel pressure. A return system is what we use on our cars. The fuel pump supplies the same flow no matter what, and the fpr regulates the pressure. What you were doing using the smaller line was increasing the fuel pressure by limiting the flow back to the tank.