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Old 02-28-2008, 07:53 PM
Blutox Blutox is offline
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Cmon carb guys...HELP

got a 75 F-100 with a re-built 400 and a 2 bbl re-built carb installed about 1 yr ago. Ran great for the few trips I've taken since getting the carb and then it started overflowing.

When I would take the needle out and re-install (It all looked great, no dirt at all) it would run fine for a while, but everytime I was sure it was good to go...overflow again.

Put a new fuel line on it and an aftermarket in-line fuel filter and it still overflowed.

Went ahead and got a re-build kit and replaced the perfect looking needle/seat and gasket. Thought sure that would do it...drove it about 30 miles and it did fine. Next day I cranked it just for the heck of it and........Yep, overflowed again!!!

What now? Fuel pump??? The pump seems to be fine. No noise, no leaks.

I'm out of ideas. Y'all got any??

Bill
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Old 02-29-2008, 06:16 AM
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3broncocrazy 3broncocrazy is offline
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Bump to the top for help

you might want to post in the carb thred http://www.ford-trucks.com/forums/forum72/
- Ga has been asleep here lately..
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Old 03-01-2008, 09:50 PM
old87 old87 is offline
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if it's old enough to have the old floats may wanna check that- good luck.
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Old 03-02-2008, 01:29 AM
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Power_Hungry Power_Hungry is offline
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Bill Cohron
Did the carb kit come with a new float? If not, junk it and get a new one. Also, make sure you have the float height correct or you're in for a world of headaches.

Bill
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Old 03-02-2008, 09:07 AM
Blutox Blutox is offline
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Thanks power Hungry,

Nope, no float with the kit. I guess I can buy it seperately?

Do you know where I can find the specs for a wet check? My kit instructions only had measurments for "dry" float height. It said to refer to my service manual (that I don't have) for "wet" specs.

Also...

Should I sop all the gas out and do a dry measure.

Can ya tell I'm pretty new at this? Haha

Thanks,

B
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Old 03-02-2008, 11:12 AM
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Power_Hungry Power_Hungry is offline
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If the float is saturated, it's useless. The instructions in the card kit should have had specs for a wet check, but it's a little tricky and I don't recommend it which is probably why they don't include it any more. Taking the air horn off a Motorcraft 2bbl is easy enough and the engine will idle fine with it off. Keeping the fan from blowing stuff everywhere (including in your clean carb) is another matter.

Save yourself the trouble... spend $8.95 for the float and be done with it.

Bill
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Old 03-02-2008, 11:12 AM
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