Flooding Carb
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Cross-Country
Joined: Jun 2011
Posts: 57
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From: South Georgia
Flooding Carb
I have a 1969 F100 that sat for 6 + months. When starting it's belching black smoke. The gas was dead so I pumped out all bad gas and put in new. I pulled the top of the single barrel carb off to see the condition of the bowl. No gunk, clean. New gas helped but after shutting off and it sits for a minute it floods. disassembled carb and cleaned. Then put a repair kit in and that did not help. After shutting down I hear a noise coming from inside the carb. When I re-removed the top the bowl was empty. Nothing has been changed. It just sat not driven. What's going on? Please, I'm at a loss as what to do.
Lead Driver
Joined: Apr 2011
Posts: 6,399
Likes: 40
From: El Dorado, Arkansas
You mentioned a single barrel carburetor. By that, I take it you have either a 240 or a 300? If the engine is flooding out and the carburetor bowl is coming up empty, sounds like the float isn't set and the needle isn't seating to shut off the gas flow from the carburetor.
Check the float height and make sure the float spring is securely clipped into place.
Check the float height and make sure the float spring is securely clipped into place.
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Cross-Country
Joined: Jun 2011
Posts: 57
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From: South Georgia
Carb Flooding
Sorry, it's a 240 manual trans. The repair kit came with a new needle and seat which I used. I checked the float level and it was in spec's. I then replaced the new needle and seat with the old one and still nothing
Fleet Mechanic
Joined: May 2001
Posts: 1,396
Likes: 4
From: Cupertino
I agree: Ultra is on it. But there is an off chance that the mechanical regulator in the fuel pump has frozen up from all the sitting. The carb might be getting overpressured.
You can also pull the carb and get your mouth on the fuel gozinta. Right side up, with an empty bowl. you can blow past the needle valve in the seat. Upside down, the seat should seal. This is a Toothless Jake option, but other than replacing and resetting the carb internals and fuel pump, you seem stuck.
Let us know your solution.
You can also pull the carb and get your mouth on the fuel gozinta. Right side up, with an empty bowl. you can blow past the needle valve in the seat. Upside down, the seat should seal. This is a Toothless Jake option, but other than replacing and resetting the carb internals and fuel pump, you seem stuck.
Let us know your solution.
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Cross-Country
Joined: Jun 2011
Posts: 57
Likes: 0
From: South Georgia
Flooding Carb
Yeah, my next step was to check the fuel pump pressure if I can find a low pressure gauge without buying one. I've read where about 5 psi is normal. I was looking to the fuel pump as a possible cause but put that aside because I could not see how sitting up could change anything about it, but you say the pump has a mechanical regulator which may be stuck or inoperable. I'll look it over to see if it can be opened up and checked. Probably not. Hate to by a new one since this one is only 2 years old, but I may not have a choice. I'll come back to this thread if I come up with the solution to my problem. Thanks to you Ultraranger and CougarJohn for your help.
P.S. To make my day even worse, yesterday a flock of buzzards flew up from beside the rode and I managed to kill one with my windshield. Fractured the drivers side area to the point I can hardly see through. Life can be testy some times. Anyone know where I can get a used one?
Thanks again.
P.S. To make my day even worse, yesterday a flock of buzzards flew up from beside the rode and I managed to kill one with my windshield. Fractured the drivers side area to the point I can hardly see through. Life can be testy some times. Anyone know where I can get a used one?
Thanks again.
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Cross-Country
Joined: Jun 2011
Posts: 57
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From: South Georgia
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Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 97
From: Waterloo, Iowa
Used windshield is more trouble than they are worth usually. Tough to remove them without breaking, typically have lots of "sandblasting". The labor cost is the same, etc. Go with new.
Mechanic's vacuum gauge also test fuel pump pressure. Usually around $20 to $30 new. Very useful tool for troubleshooting and testing and tuning engines and carbs.
Mechanic's vacuum gauge also test fuel pump pressure. Usually around $20 to $30 new. Very useful tool for troubleshooting and testing and tuning engines and carbs.
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Thread Starter
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Cross-Country
Joined: Jun 2011
Posts: 57
Likes: 0
From: South Georgia
Flooded Carb
I have no experience working with auto glass. Thanks for the input Tedster9. Now that you mention it, a windshield that's been a vehicle for 47 years would for sure be a bear. Unless I can find one that's out and clear I will take your advice. At a salvage yard it's "you break it, you buy it"!
Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 97
From: Waterloo, Iowa
New glass and install isn't that bad dollar wise for these trucks. They'll come right out to your place and do it on the spot. Install isn't rocket surgery but a lot of people seem to think paying a pro was worth it. Breaking the glass on installation isn't exactly unheard of.
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Cross-Country
Joined: Jun 2011
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From: South Georgia
Well, since my last post I've had to push my truck to the side. My wife decided she (meaning me) wanted to paint a room in the house. That room led to another which led to another, you get the picture. So, with that done I turned back to the truck. I removed the carb and with a full bowl and about 2 psi pressure on it gas dribbled down the inside of the barrel. Seemed to be coming from a elongated vertical slot located where the butterfly rest when closed. Not knowing the carb's anatomy I can't tell where that port led. Anyhow, I replaced the carb with a refurbished one (Tomco). Just a bolt-on and runs great. I ordered a windshield (buzzard strike) and it will be here tomorrow. I decided to have the glass company do the install considering how my lucks been going I feel that will be best. Thanks all for your input. Great site, great members!
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