No gas getting to carb.

Re: Fuel pump working or not?

I don't think the eccentric has come loose again. It seems to run fine most of the time. It just cut out on me the other day. When I push the rpms up, I can see the gas streaming into the fuel filter, it just doesn't seem like it's enough. I think at high rpms like when I was driving down the highway, it just can't keep up with the demand, and gets starved. I was asking someone else, and it looks like there is something, maybe some kind of filter at the fuel inlet on my Carter carb. I wonder if I've got some kind of blockage there, or at the pickup in my tank. It figures, I just took the car to the gas station on Saturday for it's big maiden voyage. I filled the tank to the brim. Now I've got to try and siphen the gas down far enough to get the tank out of the car :-( I didn't have time to get into the carb and see if that inlet has some kind of fuel filter.

p.s. can't figure out why in the world that eccentric was a problem. When I tried to tighten it back down, it's as if some of that pin on the cam was sheared off. I never have found the other piece of the pin. Puzzled as to how, or why that could have ever had enough pressure to shear that pin. After all, it's only the pressure of the mechanical pump. Wonder if maybe the pump got jammed or something.

 

Re: Fuel pump working or not?

O.K. let me try again. I discovered the eccentric was loose. I took the timing cover off, and the pin in the cam had been sheered off somehow. I replaced the pin, and torqued it down. I put a new fuel pump on with an inline clear filter. After believing there to be a blockage in the tank, or the line coming from the tank, I disconnected that line and put it in a can of gas. It isn't getting any gas out of the can, and up to the carb. However, when connected to the line from the tank, it will pull just enough to keep it running, so I know the pump is working, just not pumping enough, indicating some kind of blockage. Thats why sunk the intake line into a can of gas.

 

Re: Fuel pump working or not?

Well, I understand what your saying about bipassing the line from the tank, but that's what I'm trying to do by just putting the intake line into a can of gas. But I'm not getting any flow that way. I have something round at the inlet of my carb. I can't see what it is, it's all in the housing of the carb, but there is some kind of round protrusion. I'll see if I can screw it out of there tonight. I blew the line clear that runs from the pump up to the carb, and there wasn't anything in it. So I'm pressed to find out why it won't suck it up out of the can on the ground.

 

Re: Fuel pump working or not?

Well, I just checked, and there is no other filter than the clear in-line filter I installed. Once again, I took the line loose that feeds the carb. It is chugging gas out of there, and it appears that it is letting adequate fuel into the filter. I wanted to make sure the eccentric hadn't come loose again...it appears that the pump is working properly. One thing I just can't figure, and I'd be happy if anyone could tell me....why won't it suck gas out of a can sitting on the ground? Everyone I talk to tells me it should. But there is no blockage in the line from the pump to the carb.

 

Re: Fuel pump working or not?

Well, I don't know where else to turn. I haven't eliminated the in-line filter completely. The filter has 2 different size openings. You trim the inlet, and outlet to allow a bigger diameter of fuel to flow through. I have opened it up as much as it will go. It's a good 3/8" open. Should be more than adequate for fuel to flow through. I ran it, and it is STILL not getting adequate flow. I am out of ideas. When I disconnect the line feeding the carb, and turn the car over, it pumps ample fuel. It also lets ample amount of fuel into the filter. It's when I connect the line to the carb that it will only allow so much to get through. I really don't think it is a problem inside the carb with a needle or seat. I think if that was the case, it would either flood, or not start. Neither is the case here. I'd love to hear any other ideas you might have.

I've tried turning the filter both ways. According to the arrows on the filter, I've got it running the right way. I appreciate the tip though.

 

Re: Fuel pump working or not?

Well, after I installed the new pump, and all of this happened, I took it off again, and checked the arms thinking maybe the new pump had a different, if not shorter arm. They were identical.

 

Re: Fuel pump working or not?

Well, first.....I replaced the fuel pump because I thought it was bad. When I first started describing my symptoms to a friend, he said it sounded like a weak pump. That's why I put a new one on.

As for the carb, I think that will be my next focus. I'm a little afraid of tearing into it, I've never tried rebuilding a carb. Don't exactly have the money to buy a new one yet. Well, I don't even know how much they are. Might ought to check.

 

Re: Fuel pump working or not?

The carb has been on the car all along. It's probably 15-20 years old. I went home and tinkered with it a little at lunch. I have a plug that restricts a vacuum at the front of the carb. Never noticed before, but it is cracked pretty bad. I can see daylight through the crack. I also have a bad leak of some kind at the front left of the carb. Kind of close to the electric choke. I wouldn't mind buying a new carb, I just wish I knew that would fix it. I've spent dollar after dollar chasing this problem. I thought $50 for a new fuel pump was bad, I cringe to think what a carb would run.

It recently has started idling very very high once it gets warmed up. Doesn't that also point twords some kind of vacuum leak?