Bad Fuel Pump?

Well when we parked the comet about a month ago it purred like a kitten. Went today to start it, it fired right up and ran a couple minutes then died, since we overhauled the 302 we put a clear inline filter before the new pump and one before the carb. The filter before the carb is dry, and is pressurized after cranking. Is this possibly a bad fuel pump? We also replaced the fuel sending unit and had the tank cooked out last year, but I suppose it could be stopped up. What do you guys think? Thanks

 

Try tapping on the carb while pumping and cranking...
Does it have gas

 

Try removing the fuel line and check for pressure. With it off, turn over the engine and see if it's shooting gas out. Make sure the fuel is contained, possibly adding some line and catching it in a jerry can. Be sure there is gas, then check for spark. A fuel pressure gage would be ideal as well.

 

What is normal fuel pressure? Can a fuel pump build pressure to the carb and not pull from the tank?

 

I don't believe that is possible. It should be a single diaphragm in the pump that sucks and then blows as the arm is driven up and down on the pump. I'm not sure on the pressure right now, but I think it's in the 20+ psi range.

 

Carb will have about 7 PSI. Do like Blugene said tap on the carb next to the fuel inlet. Maybe a stuck float or needle and seat.

 

If you suspect the fuel pump has gone bad, make sure to check your engine oil for gas! A buddy of mine just had the diaphram go out on his pump and filled his engine with gas. It ruined the bearings and now he is having to do a rebuild.

Also, how long ago did you put gas in the car?
Gas used to last a year or better, but lately I notice that it doesn't last 3 months anymore!

 

Well today I replaced the fuel pump. Fired up and both inline filters filled up then, filter before the pump went dry then it died. I took the line off of the sending unit and gas poured out. Is it possible to starve through the sending unit filter under pressure from the pump, but still pour out with line removed? I put a new sending unit on last year when I cooked the tank. Are these filters on the sending unit prone to stop up easy.

 

Well it runs great with the fuel line going into the pump stuck into a can of gas, If I remember correctly the sending unit did have a filter on it. And it does have fuel in the tank.

 

I couldn't find just the sock/pick up filter.

 

Maybe the tube broke off? Does it read fuel?

 

yes it reads 3/4 tank.

 

Is it right? If it is, drain it and take the sender out. It's easy...

 

You don't have to drain the tank to remove the sending/pickup tube/sock filter. You just jack up the left rear of the car, the fuel will shift to the right, you can then remove the unit without draining the tank

 

Good idea. I just thought with 3/4 tank might be much.