Originally Posted by Robert08
I have a 65 mustang with a 302 out of a 75 Granada. The problem is when the car sits for longer than a day it takes a long time to get it to start. I have see-thru fuel filter on the car and stock fuel pump. After a day or so all the gas in the line drains back down to the fuel pump. It takes a a lot of cranking of the motor before the gas fills the line back up and the car starts. If I pour gas in carb the car starts right up. My question is the fuel pump bad or is it something else?
Any insight would be a great help. Thanks.
Bad pump, the valve that opens to the fuel line isn't seating tightly. This reduces the suction the pump can develop and allows fuel to leak back to the tank.
However, the carb should retain enough fuel in its bowl and certainly the accelerating pump to offer at least a prime to initially fire on, though may not be enough to sustain operation till the pump picks up enough to supply the carb. So you can possibly include a carb rebuild and may, also, need to deal with excessive heat that cooks the fuel out the carb's vents when it's left to sit. An insulating spacer will help if this is a problem.