please help! carb problem!!

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Sep 17, 2005 | 09:00 AM

mikedogg7

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Joined: Jan 2004

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From: Annan, Ontario

please help! carb problem!!

hey, im having a frustrating problem with my 1984 ford f150, 300 inline 6. I decided to rebuild the stock carter YFA 1bbl carb, i did everything successfully, but im having a problem getting fuel into the carb. it seems the float doesnt wanna go down enough to allow the pin to drop, to let fuel in, but it could be also that the pin is sticking, or stuck. im gunna work on it today, and see what i can do, i know it runs because, i took the top of the carb off, poured full in the reservoir, went and started up the truck, and it fired right up, ran for maybe 15 seconds, then stopped because the carb ran outta fuel. please help me guys, i really need somthing to drive tonight!!! thankks much!

MIKE

Sep 17, 2005 | 09:50 AM

SmokyOlFord

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From: Black Hills South Dakota

Maximum float drop is set with the float hanging down. That's one adjustment.

The other adjustment is made with carb top plate held upside down to set the opening point. For this adjustment, I took the instructions to mean the float had to be lifted a bit with a finger so it just rested on the pin and did not compress the tiny spring inside the valve, then the float is adjusted to correct distance. If you let the float rest with its weight on the spring, you'd need to bend it a lot more to get the specified distance. The end result being the float drop is about 1/8th inch or so too great.

Set this way, the float might drop quite low, but the tang would still hold the inlet closed.

Or maybe there's crud in the inlet tube, blocking the port. You should be able to blow through the carb fuel inlet and feel some air move when the float opens. Jam-fit some tubing into the inlet to blow into so you don't get the taste of gas.

Check to see that fuel is getting to the carb and through the filter on the front. If no gas is getting that far, it won't matter how the float is set.

-Smoky

Last edited by SmokyOlFord; Sep 17, 2005 at 10:04 AM.

Sep 17, 2005 | 10:58 AM

mikedogg7

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From: Annan, Ontario

ok, i just got in, i managed to get the fuel pin freed up, and now there is WAY to much gas getting in the carb, its flooded really bad right now, so im just waiting, i guess ill have to try to get the float set right on, so that a lot of fuel doesnt get into the damn thing, thanks for the help so far!

Sep 17, 2005 | 11:07 AM

mikedogg7

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From: Annan, Ontario

oh ya. smokey, whats the correct measurement for the float? i mean, that how you have to bend the float with ur hands to make it right on? thanks

Sep 17, 2005 | 07:15 PM

cdherman

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Joined: Jun 2003

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From: Parkville, MO (KC)

Yes, you have to bend around on the float. That's what smokey was getting at. Sometimes when you bend one way to get the bottom end, the top gets messed up.

If you have not been setting the float by bending around on it, no wonder you had trouble. You'll get the hang of it.

As for the settings that are exactly correct for your engine -- you should have gotten a sheet with your rebuild kit. Better check there, as there are quite a few different settings along the way.

Sep 17, 2005 | 09:22 PM

SmokyOlFord

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From: Black Hills South Dakota

As cdherman said, the settings vary from one year or model of carb to the next. I'm not all that sure I even have mine right, but at least I did cure the over-rich flooding like you are seeing now. You have to bend the correct portion of the float for each adjustment. Go through the instructions very closely step by step. Move it gently by hand so you can see what is happening as the float raises and lowers. You'll figure out which way it needs to go to shut off sooner. The spring is very wimpy, try not to fuss with that much or compress it.

-Smoky.