How do you tell if Fuel Pump is bad?

[khryslerkid]

That's what I paid - so I don't want to lightly toss it. I was going to - if I have to - replace it with the same pump.

If it is the pump I'm thinking you bought, they can be rebuilt with a kit.
I'd check your push rod too. I have heard quite a lot of cases where they are worn too much to work the pump. Good luck!

 

[RT K_line]

If fuel only dribbls out at the line to the pump it's likely in the tank. run it out of a tank like you said and the engine should run, from what I read so far. Good luck!

 

[727]

Had the short jumper hose just out the fuel tank go bad and gave me the fits. Once the system was primed it would work ok. If it sat for a while I would have to prime the system again.
The fix on any car that sits a lot is to get a hand pump bulb like the ones used on 6 gallon portable boat fuel tanks. Install it in the hose just before the mechanical pump. You can pump the system up by hand before you run your battery dead.

 

[Dennis H]

Update?

 

[GetX'd]

Update?

Dennis - the update is there is not much of an update. I pulled the line off the fuel pump and connected another line that went into a gas can. Primed the carb and cranked it. It fired once - died and I just said **** it! So it's been sitting for awhile until I get the patience to go back at it. I found a Master Mechanic that said he'd work on if I liked. I'm kind of surprised but I've called a few places around here and I'm not getting the warm and fuzzies from people about working on a car like that. I have a houseful of guests so it hasn't been a priority lately. When I get somewhere with it I'll post to let folks know. I'm pretty sure it's a plug in the tank though as seems to be popular opinion.

 

['73bird]

Dennis - the update is there is not much of an update. I pulled the line off the fuel pump and connected another line that went into a gas can. Primed the carb and cranked it. It fired once - died and I just said **** it! So it's been sitting for awhile until I get the patience to go back at it. I found a Master Mechanic that said he'd work on if I liked. I'm kind of surprised but I've called a few places around here and I'm not getting the warm and fuzzies from people about working on a car like that. I have a houseful of guests so it hasn't been a priority lately. When I get somewhere with it I'll post to let folks know. I'm pretty sure it's a plug in the tank though as seems to be popular opinion.

Im going through something similar at the moment. My car was running and I drove it but I believe it ran out of gas (Gauge doesn't work). I put more gas in it and now it wont start without me putting gas in the carb. Going to see if gas is getting in the carb tonight by pulling the bottom bowl screw (cant find a sight screw/glass for the life of me 1972 6150 Holley) after trying to start it. I was told if gas (1/2 cup) is in there twice then we would look at spark. I wonder why it would start/run when gas is poured in the carb if its not getting spark that isn't logical.

 

[IQ52]

I always figure my fuel pump has gone bad when I see it sporting tatoos, purple mohawk haircut, tank top, knee high pants and cowboy boots.

 

[GetX'd]

The update on the last number of problems I've been having the the GTX is - a slight clog in the fuel line when blown out it now runs fine from a getting fuel perspective. Gas is flowing throughout the fuel system.

An even more vexing problem was the electrical issue when the car would get hot and just refuse to turnover. When cold it was fine. Seems as though it turned out to be a bad starter. Everything including the starter is new - but something was drawing the power. Extremely frustrating as there's nothing of importance with over a 100 miles on it left of the power train of that GTX. A bad brand new starter from 440 Source was the issue. Not bad mouthing them as I bought the starter 2 years ago - it's an electrical part and the. Won't warranty it. I understand that - just frustrated with some glitches that keep adding to the cash out go for this restoration. I bought a new power master starter from Jegs that says no heat soak and good to 18/1 compression. I'm not close to that - but worry about the heat soak issue. There are so many minis that I searched the old threads and came up with this one. Lord pls be good to me. Enough with the challenges!

 

[Mr Gorsky]

Happy days

 

[Car Nut]

Glad to see you're solving the problems one at a time, it can be very frustrating.

 

[GetX'd]

Glad to see you're solving the problems one at a time, it can be very frustrating.

Not to mention expensive if you can't figure out and fix it yourself. This has been a real bugger of new beginning to my relationship with the old friend - GTX. Let's hope it gets better from here on in.

I sure appreciate everyone's support!!

 

[Mike67]

I have read where you've checked the low side of the pump and all apears to be good there, but like 69roadr said you really need to see what coming out the line at the carb. Just disconnect the line get a plastic bottle to slip over the line and spin it over for a few seconds. If the pump is working you should have fuel in the bottle....
Otherwise I would think you have a stuck needle valve, float or a clogged screen on the inlet.
Just my $ .02...
Good luck!

 

[steve from staten island]

I believe someone mentioned this but a long time ago on my dad's 68 Chevy we had a intermediate no fuel issue and could not figure it out. Turned out that the pump was sucking air. There was no leaks that could be seen but there was a slight split that would suck air and cause a problem..... Just a thought

 

[twecomm]

If you have a big block, you may have a worn fuel pump push rod. They do wear out. I had this problem, it was worn by 3/8", hardly able to stroke the pump lever enough leading to fuel delivery issues. About $ 35.00 for new one, easy to replace.

 

[RT K_line]

Not to mention expensive if you can't figure out and fix it yourself. This has been a real bugger of new beginning to my relationship with the old friend - GTX. Let's hope it gets better from here on in.

I sure appreciate everyone's support!!

These old mopars sure can test your faith in MA mopars design. I haven't had a fuel pump rod problem since I had my first one lol. Every motor since I've gone electric fuel pumps. Much more reliable, and if you don't hear it it's not on lol.