I replaced the fuel pump in my 1972 cadillac eldorado and installed an inline glass fuel filter. it ran great for one day, it stalled on me today and would not start. i checked under the hood and there wasn't any fuel in the see through filter . i tried starting the car several times but it remained empty. i waited about an hour and tried it again, the filter filled up and the car started. I drove home about 5 miles w/o a hitch. i would like to know what cause fuel to fail to reach the carburetor?

30

Asked by Aug 16, 2014 at 10:23 PM about the 1972 Cadillac Eldorado

Question type: General

10 Answers

78,355

I have seen this a few times before, 1 rig in my shop had crud in the fuel tank that would get sucked up into the pickup screen blocking the fuel flow and killing the engine, once the vacuum pull from the pump stopped the crud would fall of and after a little cranking it would start and run till it was plugged again, removed tank and had it cleaned and sealed problem was gone, the other one had a fuel line that would collapse and shut off the fuel supply, engine would die from no fuel, fuel up draw would stop, hose would go back to normal engine would restart and it would do it again, and finall another rig just had a new fuel pump put on, it would drive for about 10 minutes then quit, out of fuel, wait a few minutes it would restart, it was a bad new pump. Just something's I have ran across.

2 out of 2 people think this is helpful.
101,715

Ok this might be a long shot but my brother once had someone drop some rubber pieces in his gas tank. He could drive fine for days or at times only miles then his filter would do the same. The items would float around fuel tank till they would get sucked to the inlet stopping the flow. Until the pressure released and they floated away no gas would pump thru pump. Took us months to get this figured out and tank cleaned out. Cause it only happened when ever it damn well wanted to. That being said I doubt this is your issue but it is a possibility that something in your old tank is doing the same.

1 out of 1 people think this is helpful.
101,715

Damn. Almost same description. Lol

30

I removed the fuel tank, clean as a whistle. replaced tank with new sending unit, another new fuel pump and another new carbureutor. I didnt even make it home from the shop. absolutely no fuel is being pump to the carbuerator now. Im going to run a rubber fuel line from the tank to the fuel pump to see if that works. My mechanic thanks there may be a crack or hole in the fuel line causing it to suck air. I dont know anything else to do. I"m about to lose my damm MIND! HELP ME SOMEBODY.

78,355

Have you tried to run it without the fuel cap?

30

Not yet. I was putting a gravity fed electric fuel pump on but my lines are on top of the tank. I put a suction pull (tank side), push (carb side) pump on and I'm now testing it for a few days. if this doesn't work I'm going to run a rubber fuel ine from the tank. So far so good. Thanks.

101,715

Just a thought but might want to inspect the metal fuel line from the tank to the engine. Have seen them get bent (smashed flat) against the frame rail and restrict the fuel flow.

78,355

How far from the tank is the fuel pump? They are not designed to pull much more than 18 inches. They can push good but pulling is not the best.

30

It's about 30 inches. I exchanged the old one for a new one today and will be putting it on tommorrow. I dont know how close I can get it to the tank but I'll try. There was nowhere else to safely mount it when I put it in the first time except along the driver's side railing where the fuel lines run. I will let you know.

25

This thread is still alive. I have a 72 Eldo as well. Same freaking issue. Changed everything, Carb, Distributor, Fuel pump, Wires, Spark plugs - everything. Just bought a new sending unit - should be here next week. Waiting to drop the gas tank until the unit gets here. Gonna hoist it up - and inspect the fuel lines thoroughly, not to mention the tank. Please - if you get yours going - lemme know what it was. Literally the same issue you're facing - except mine won't run for days, quits almost every time i take it out. By the way, did you remove your air pump?

Your Answer

Add photo

Related Questions

Eldorado

Looking for a Used Eldorado in your area?

CarGurus has 422 nationwide Eldorado listings and the tools to find you a great deal.

ZIP:

Search Cadillac Eldorado Questions

Cadillac Eldorado Experts

#1 spiderblu
spiderblu
Reputation 760
#2 joemom
joemom
Reputation 280
#3 lightGear
lightGear
Reputation 230
View All

Related Models For Sale

Used Cadillac DeVille
1,965 listings starting at $1,600
Used Chevrolet Camaro
665 Great Deals out of 39,408 listings starting at $3,495
Used Chevrolet Corvette
365 Great Deals out of 20,330 listings starting at $3,688
Used Ford Mustang
714 Great Deals out of 38,588 listings starting at $1,963
Used Chevrolet Monte Carlo
15 Great Deals out of 1,730 listings starting at $1,695
Used Chevrolet Impala
965 Great Deals out of 36,458 listings starting at $1,800
Used Chrysler 300
501 Great Deals out of 21,027 listings starting at $1,500