Last time I drove the '72 Grabber was Thanksgiving last year. When I went to park it, I remember it was running kind of bad, it didn't want to idle or run right. I figured it was out of gas and didn't think much of it. Well, I dumped a couple gallons of gas in it the other day and tried to start it. Nothing, no gas getting to the carb. So I went through and blew through the fuel lines and everything to make sure nothing was plugged up. When I pulled the rubber line just behind the torque box loose under the car, gas came out, so I know I've gas up to there at least. I replaced the rubber line down there at the same time, as it was dry rotted. Tried to start again, still nothing. Dumped some gas down the carb, fires up, runs for a few seconds, dies. Classic fuel delivery problem. Thought maybe it was the fuel pump, so I put another known working fuel pump on it. Same thing, tried over and over to get it started and it is just not pumping fuel for some reason. I've verified all the fuel lines and everything are clear, I even took a piece of rubber line and hooked to the fuel pump and stuck it directly in a can of gas, and it wouldn't suck it up. I just don't get why it's not pumping?? The car has the original 148,000 mile 302.
Yes, as I said I verified there was nothing blocking any portion of the fuel lines. I even tried connecting a rubber line directly to the fuel pump and putting it directly in a can of gas and it wouldn't suck that up.
When you installed the pump, are you sure that you got the actuating arm on the bottom of the pump eccentric? If not the arm won't move and no gas will pump. When you had the pump hooked to a can of gas did you pull the line at the carb to see if it was getting there? It might be a stuck needle. Sometimes you can free a stuck needle and seat by tapping on the carb above or on the side where the inlet is. It may fix the problem temporarily but if it sticks once you should probably replace it with a good kit. (the cheep kits come with bad needle and seats sometimes - or the go bad soon after installation.
Yea, I installed the pump correctly. Have installed several in the past. I have a clear fuel filter just before the carb, so I can see if any gas is getting up there. It's dry. I just read on another forum about the lobe that operates the pump may have worn flat. I hope that's not the problem, but I am going to look into it.
if you've already replaced the pump, and can verify gas is getting to the pump but not past it, the eccentric (ie. fuel pump lobe) is probably worn down like the other forum mentioned. ive never seen one do it but anything is possible. not that bad of a job to change if that's the problem, just gotta tear the front of the motor apart. keep us posted
It would have to be worn down quite a bit before it would stop moving the arm for the pump, you would think??
The bolt holding the eccentric in place can back out if it's not locktite'd and the eccentric will not turn. Took me one brand new fuel pump and a few phone calls to discover that problem could exist. That was the first time (this was 1994 or 95) I ever had my timing cover off. Great learning experience. They can also break if they are not the two-piece style normally used on our cars, but I'd think it would take some extreme mileage for that to happen.
He's referring to the fuel pump eccentric. See my post above. I imagine you've seen one of those before.
if he was referring to the...fuel pump eccentric...he would have said...fuel pump eccentric ...and not..."lobe that operates the pump". ......
Jamie try cracking the line at the clear filter ...dump some gas down the carb start er up and see if you get any thing out of the line. if the seat is sealed shut it wont pump the gas up cause the air is pressurized in the line thats why you need to open it
