Carburetor leak
Posting Guru
Joined: Mar 2006
Posts: 1,182
Likes: 1
this is outside my usual area, but since nobody else has chimed in...
how much fuel are we talking about?
i'm wondering if either-
the carb is running super-rich and fuel is somehow getting into the vacuum port on its way down towards the intake
or
maybe there's a crack somewhere that is allowing fuel into the vacuum port?
how much fuel are we talking about?
i'm wondering if either-
the carb is running super-rich and fuel is somehow getting into the vacuum port on its way down towards the intake
or
maybe there's a crack somewhere that is allowing fuel into the vacuum port?
Thread Starter
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Senior User
Joined: May 2012
Posts: 112
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From: Taunton, MA
It's the stock carb so maybe a motorcraft 2100? The fuel literally pours out of the vacuum port when the truck is running. Only work it's had done in that area was the base gasket got replaced but there wasn't anything that got hit or changed on the carb itself.
Senior User
Joined: May 2010
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From: BC Cana'duh
Maybe a 2150?Either way it sounds like a rebuild is in order.Don't run the truck like that as a fire is bound to happen.One of my trucks caught fire from a leaky fuel filter.I was able to put it out quickly though.I carry a 3 lb fire extinguisher in any vehicle I drive.Ya never know.Rebuild kits are cheap and once you take the carb apart the problem should be evident.I'm still thinking stuck needle in the seat.
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Senior User
Joined: May 2012
Posts: 112
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From: Taunton, MA
Yeah, i know what you mean. All three trucks have this issue right now. I think ill take apart the one at home and see whats what inside there first. Its probably all the same problem.
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Senior User
Joined: May 2012
Posts: 112
Likes: 0
From: Taunton, MA
After tearing into one of the leaky carbs it seems that it is dumpin fuel into the engine and when the throttle is closed the gas backs up and comes out the vac advance hole in the passenger side barrel. What now?
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Posting Guru
Joined: Mar 2006
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i think you are back to Big Vann's suggestion- sounds like the needle isn't seating properly to shut off the fuel flow.
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Senior User
Joined: May 2010
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From: BC Cana'duh
You're going to have to rebuild the carb.They're pretty simple to do.Just get a good rebuild kit and follow the directions.Clean it very well and make sure all the new parts go in.Remove the float and check that it doesn't have any leaks by placing it in a container of water to see that it floats.If you see any air bubbles when it's submerged,it has a leak and needs replacing.
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