Fuel tank too full?

[msommer001]

Can I be filling my tank to full? I have been having trouble with the bronco stalling. I thought vapor lock so I relocated the gas line to outside the frame.

Then tried again, nonissue driving to the store, a 3 to 5 minute drive. Then on the way home stall. Engine was warmed up but it was not a hot day outside. I would wait about 3 to 5 mins and bronco fire right up, I would drive for about 30sec to 1 minute and then stall. I repeated this for 3 or 4 times until I was back in the garage. I also removed the fuel cap to see if venting was an issue, it did not help.

The tank was full at this point. I started to empty the tank so that I can lower it to see if there is a blockage in the tank and noticed that the filler neck has a significant crease/fold in it so that it connect to the tank. It is not the 2 part filler neck. When I loosened the filler neck and vent hose fuel spilled out of both.

Can the filler neck and vent not allowing air into the tank create this intermittent stall?

Either way I plan to install the correct filler neck to eliminate the possibility.


Sent from my iPhone using Tapatalk

 

[D.R.Y.]

I would change the filler neck for a start. might be a idea to change the fuel filter at the carburator to.
Sure more suggestions will come soon.

 

[bronconut73]

May not be fuel. I had a voltage regulator do this to me once. Kept having to pour water on it to cool off enough to drive a little further.
Or was it the ignition box?....

 

[bronkenn]

I would check the fuel filter/sock in the tank. When it starts it runs fine until it picks up debris in the tank and stalls. Then the debris falls away from the pick up filter and it runs again until the suction picks up the junk again and stalls. Ken

 

[msommer001]

I am on the right track, planning to drop the tank tonight, it is plastic, so there should not be any metal debris. I will clean it good and make sure the pick up is in good shape, then plan to put the correct filler neck on.

Now might be a good time to upgrade to a larger tank...


Sent from my iPhone using Tapatalk

 

[Broncobowsher]

I'm 99% sure it is NOT the problem. Even if it is a problem, that should have nothing to do with your stalling.

 

[half cab]

History on the coil?

 

[msommer001]

I believe that the coil is stock.

I think it is a fuel delivery issue, at the time it stalled I was able to open the hood, the fuel filter looked to be empty or at least below the level needed to feed the carburetor.


Sent from my iPhone using Tapatalk

 

[BRONCITIS74]

I had the same thing happen to my 74. Turned out my fuel line had a small kink in it and would starve the engine. The fuel line was replaced for the tank to the motor and haven't had a problem since.... just something to check. Hope this helps.

 

[msommer001]

Finally got the tank down and drained of fuel. Lots of floating debris. It is a plastic tank, here is how I cleaned it.

1. Flushed with water
2. Drained
3. Used dish soap and power washer, worked back and forth and side to side
4. Flushes with water
5. Drained.
6. Repeated soap and power washer
7. Drained
8. Added some rocks, shook around on all sides
9. Drained
10. Power washed and used wand to scrap the sides and bottom as much as possible.
11. Flushes again, lots of large sticky flakes came out
12. Power wash and flushes until clear

Tank is drying now. Not sure if I should do more.




Sent from my iPhone using Tapatalk

 

[bronconut73]

What do you think all that junk in there was?

 

[msommer001]

What do you think all that junk in there was?

Old fuel, bronco sat for years before the purchased and started to work on. Thought I cleaned it well a few years back but obviously I did not. Used power washer this time. Lots of debris came out.


Sent from my iPhone using Tapatalk