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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 22, 2020 | 02:17 PM
  #46  
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Originally Posted by kr98664
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?
it seemed to seep out of the bottom gasket above the manifold. Hard to tell exactly where it’s coming from.

I can try again with a helper and keep a closer eye
 
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Old Mar 22, 2020 | 03:00 PM
  #47  
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Originally Posted by Tonto Kowalski
it seemed to seep out of the bottom gasket above the manifold.
Hmmm...

That gasket typically sticks out a bit on the inside, creating a little ledge. If any fuel spilled down the wall of the carb throat, it would dribble down, flow over this ledge, and keep going into the intake manifold. The fuel shouldn't be able to make it to the outside from there.

If this is how fuel is getting outside, then that gasket must be leaking profusely. I'd suggest making sure the carb mount bolts are secure. If good, the gasket may be bad or the mating surfaces are not true, preventing a good seal.

Such a leak in that area could be part of why the engine is so hard to start, too.

That's all I got. Didn't mean to hijack the thread. Just wanted to point out a major clue, and make sure it wasn't overlooked.
 
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Old Mar 23, 2020 | 03:10 PM
  #48  
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Ok, small update...I closed the choke and primed the carb with the throttle quite a few times (10-15 times).

I also threw a bit of extra fuel in the brass tube for good measure. Just in case.

I hopped in the cab, tried to get something positive happening and I was only able to crank away. It never turned over.

1 step forward, 5 steps back...

I have a few updates photos en route

 
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Old Mar 23, 2020 | 03:21 PM
  #49  
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The leak...

As far as I can tell, the carb’s fuel leak seems to be coming from an area under the gasket which I suspected. Sort of where (in the photos below) the bronze metal meets the lower silver metal area.

So possibly below the gasket that I initially thought was leaking.

Anyone know how these two parts come together?


From the passenger side front area of the lower carb.

From the passenger side front area of the lower part of the carb.

From the passenger side fender area of the lower part of the carb.
 
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Old Mar 23, 2020 | 04:08 PM
  #50  
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Between the base of the carb and the carb base plate adapter? There's a gasket there. If you are talking just above that, at the joint between the throttle body and the main body of the carburetor, there's a gasket for that too, comes in a rebuild kit.
 
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Old Mar 23, 2020 | 05:43 PM
  #51  
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I am not sure why you pumped the carb 10 to 15 times, and then threw fuel in on top of it. With the choke door closed you pretty much drowned the spark plugs. I would pull them out and see how bad they are and try to dry them out.

If you can verify you do have the carb squirting fuel by moving the throttle, do it once to see, and maybe one more time, let the choke door shut and then try cranking it again after you have dried the plugs out and see if it tries to go.

P.S. I think of cranking over and turning over as the same thing, the starter is turning the engine To avoid confusion I like to call when the engine will not run as not "firing" or "not running".
 
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Old Mar 23, 2020 | 08:17 PM
  #52  
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Originally Posted by Tonto Kowalski
Ok, small update...I closed the choke and primed the carb with the throttle quite a few times (10-15 times).

I also threw a bit of extra fuel in the brass tube for good measure. Just in case.

I hopped in the cab, tried to get something positive happening and I was only able to crank away. It never turned over.

1 step forward, 5 steps back...

I have a few updates photos en route
Crank & turn over are the same thing.
So it never tried to start? If not have you checked for spark? I don't care how much of a vacuum leak the motor has you have added a lot of fuel and it should have tried but may not have stayed running.
Dave ----
 
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Old Mar 24, 2020 | 09:28 AM
  #53  
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Originally Posted by Franklin2
I am not sure why you pumped the carb 10 to 15 times, and then threw fuel in on top of it. With the choke door closed you pretty much drowned the spark plugs. I would pull them out and see how bad they are and try to dry them out.

If you can verify you do have the carb squirting fuel by moving the throttle, do it once to see, and maybe one more time, let the choke door shut and then try cranking it again after you have dried the plugs out and see if it tries to go.

P.S. I think of cranking over and turning over as the same thing, the starter is turning the engine To avoid confusion I like to call when the engine will not run as not "firing" or "not running".
Hey Dave, I don't really know what I'm doing...so I thought...10-15 little squirts = bigger bang. I suppose that was totally incorrect. I'm going to dry out the plugs this AM and then give this another shot.
Also, sorry for the confusion. Yesterday I was constantly cranking it over, with no firing at all.
And again, I really do appreciate the input. You guys are a huge help.
 
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Old Mar 24, 2020 | 09:31 AM
  #54  
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Originally Posted by FuzzFace2
Crank & turn over are the same thing.
So it never tried to start? If not have you checked for spark? I don't care how much of a vacuum leak the motor has you have added a lot of fuel and it should have tried but may not have stayed running.
Dave ----
No, it never wanted to fire. Now, before this whole thread started, I did have a bit of a positive: I squired starter fluid down the carb and the engine sputtered and fired for just a few seconds. BUT, since then (Saturday) I haven't had any such luck.
Also, I have not checked for spark, will do today...but I'm pretty sure the spark is there. Plugs are only about 1 year old and so is the distributor cap.
 
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Old Mar 27, 2020 | 11:22 AM
  #55  
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One other possible factor...

I recently noticed that the below broke in half, so I ordered one off of eBay and replaced it...fuel bowl vent solenoid?


Anyone know how to test this baby and confirm that it’s working? IF it wasn't working correctly, would this contribute to my hard-starting issues?
 

Last edited by Tonto Kowalski; Mar 27, 2020 at 11:58 AM. Reason: it's incorrect
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Old Mar 27, 2020 | 11:40 AM
  #56  
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And here is some fuel squirting onto the front of the carb when disconnected
 
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Old Mar 27, 2020 | 02:46 PM
  #57  
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Originally Posted by Tonto Kowalski
One other possible factor...
I recently noticed that the below broke in half, so I ordered one off of eBay and replaced it...fuel bowl vent solenoid?
Anyone know how to test this baby and confirm that it’s working? IF it wasn't working correctly, would this contribute to my hard-starting issues?
If it is broken it should not keep the motor from starting or running.
What is the buzzing I hear just before the motor starts to crank?
Dave ----
 
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Old Mar 27, 2020 | 03:55 PM
  #58  
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Originally Posted by FuzzFace2
If it is broken it should not keep the motor from starting or running.
What is the buzzing I hear just before the motor starts to crank?
Dave ----
It's a spring or something on my clutch pedal.
Needs a bit of WD40 I suppose.

Also, I checked the spark plugs, they are dry...but, I also held 2 of them against the engine block while the engine was cranked over...
I saw zero spark...
 
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Old Mar 27, 2020 | 05:41 PM
  #59  
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Well I wonder if that not the problem all along?
Lets pull the coil wire out of the dist. cap and hold it close to the block and see if you get a lot of sparks..
Did you replace the module on the fender and if so try the old one and see if you get sparks then and report back.

With out the motor even trying to fire off and the plugs wet it sounds like it did not have spark for some time?
Dave ----
 
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Old Mar 27, 2020 | 06:14 PM
  #60  
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Originally Posted by FuzzFace2
Well I wonder if that not the problem all along?
Lets pull the coil wire out of the dist. cap and hold it close to the block and see if you get a lot of sparks..
Did you replace the module on the fender and if so try the old one and see if you get sparks then and report back.

With out the motor even trying to fire off and the plugs wet it sounds like it did not have spark for some time?
Dave ----
it feels like a little bit of progress...which is encouraging.

here are a few updated photos...


The drivers side fender. Did a previous owner remove the ignition control module from over here? Do I NEED one over here?

Any idea what kind of bolts hold this ignition control module to the side of the distributor?

These were zip ties that were holding the ICM wiring harness inside the housing...i mean, seriously?!?

 
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