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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

Starting Problems - bad fuel pump? Need advice!

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Old Mar 20, 2020 | 03:43 PM
  #31  
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I took a plastic bottle and whittled an undersized hole in the cap and jammed in a piece of thin hose/tubing. Only issue is, how much does the bowl hold? First time I tried I ended up dumping a ton of fuel down the carb. I let it sit for days, or a week or so, then put just a couple of ounces in the bottle and added it to the carb. Don't have to fill the bowl, just get enough in there to keep it running long enough to prime the pump and the lines.
 
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Old Mar 20, 2020 | 09:16 PM
  #32  
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Originally Posted by Kramercd
I took a plastic bottle and whittled an undersized hole in the cap and jammed in a piece of thin hose/tubing. Only issue is, how much does the bowl hold? First time I tried I ended up dumping a ton of fuel down the carb. I let it sit for days, or a week or so, then put just a couple of ounces in the bottle and added it to the carb. Don't have to fill the bowl, just get enough in there to keep it running long enough to prime the pump and the lines.
Depending get how much went down carb you could have waited 15 to 30 min. Then try and start by holding pedal to the floor.
You can tell when the bowl is full gas will spit out where the hose goes in the bowl vent.
Dave ----
 
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Old Mar 20, 2020 | 09:25 PM
  #33  
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It starter pouring out more places than just the vent. Think it pulled a siphon or something. Felt like it dumped it all back out.
 
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Old Mar 21, 2020 | 02:41 PM
  #34  
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Originally Posted by Franklin2
Ok, that's a problem. Now to figure out what is causing it. When you finally get this thing started on starting fluid and warmed up, did it run ok or did it have a bad hesitation when you hit the gas pedal? I am trying to determine if your accelerator pump is bad, or you just do not have any fuel in the carburetor.

If it has a bad hesitation when you have been driving it, that is a clue the accelerator pump in the carb has a problem, and you have been getting puny dribbles all the time. And that is why you are having a hard time starting it, you can't squirt any fuel in there to help it get going.

If it has been driving fine when you finally get it going, then I suspect you do not have any fuel in the carb. I would pull the fuel line off the carb and put a rubber hose on it and point it in a bucket. Then crank the engine over, you should have strong spurts of fuel coming out of the hose when you crank the engine.
I pulled the fuel line, it's metal. I just unhooked it because I really didn't expect anything to squirt out, to my surprise...it did. I tried it twice and there were two squirts that squirted out. It was no geyser, but I could see it for sure.

I then attempted to take the top off of the carb to have a look inside...but got jammed up after taking the star-bits out. It was attached in the back by the levers that move with the butterfly valve and at least one other.
At that point, I got scared and backed off at that point. Didn't want do f*#% things up further than they already are.

So, I've still got an 85' f150 that won't crank over...just spins and spins and spins. Super frustrating.
 
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Old Mar 21, 2020 | 02:55 PM
  #35  
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On youtube it seems like some models carburetors have access holes where you can manually pour some fuel directly into the bowl for the float.

Mine clearly does not have that.

Will pouring a few shots of fuel down the main carb-hole (where my butterfly valve is) achieve the same results...eventually?


my "main carb hole"
 
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Old Mar 21, 2020 | 03:00 PM
  #36  
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That brass tube cut at an angle. Put it there.
 
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Old Mar 21, 2020 | 03:15 PM
  #37  
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Originally Posted by Kramercd
That brass tube cut at an angle. Put it there.
Oh wow, really? I think that’s doable!
I’ll let u know how it goes
 
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Old Mar 21, 2020 | 03:18 PM
  #38  
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Small piece of tube stuck in a bottle cap. Just a couple of ounces. Or a tiny funnel would work.
 
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Old Mar 21, 2020 | 05:36 PM
  #39  
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Originally Posted by Kramercd
That brass tube cut at an angle. Put it there.
Yep that's the bowl vent to the motor side.
There might be one on the front side, kind of looks like a fuel line would hook to it.
That is the bowl vent to the charcoal canisters under the battery.
Dave ----
 
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Old Mar 22, 2020 | 08:58 AM
  #40  
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Once you get fuel in the carb, see if you get a good stream of fuel into the engine when you open the throttle wide open (engine still off). Your problem is looking like the carb, we now need to figure out what is wrong with the carb.
 
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Old Mar 22, 2020 | 11:13 AM
  #41  
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Used an old coke bottle and a mini funnel.
Fuel immediately started leaking around the base of the carb...



 
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Old Mar 22, 2020 | 11:15 AM
  #42  
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Originally Posted by Franklin2
Once you get fuel in the carb, see if you get a good stream of fuel into the engine when you open the throttle wide open (engine still off). Your problem is looking like the carb, we now need to figure out what is wrong with the carb.
yes, nice little spurt each time I hit the throttle
 
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Old Mar 22, 2020 | 11:53 AM
  #43  
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If the fuel has dried up that spilled, see if it will start. Choke should be closed, and give the pedal a couple of pumps, and then see what happens.
 
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Old Mar 22, 2020 | 11:55 AM
  #44  
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There was a lot spilled down there, I'll give it an hour or so
 
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Old Mar 22, 2020 | 01:17 PM
  #45  
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Originally Posted by Tonto Kowalski
Used an old coke bottle and a mini funnel.
Fuel immediately started leaking around the base of the carb...
Um, this grabbed my attention right away. Something doesn't sound right with fuel appearing immediately at the base of the carb.

Did you spill some fuel externally and that's where it collected?

Or did the fuel come from inside the carb somehow, such as from a cracked casting or a loose fitting?
 
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