Fuel Bowl "dries out"
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Senior User
Joined: Sep 2003
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From: Central Texas
Fuel Bowl "dries out"
I do not know if I understand this correctly, but here goes. When I do not start my truck every couple of days, I need to dump gas in the carb to get it to start. I have always attributed this to the fuel bowl drying out. I have a 351M with the stock 2v carb. Is this what is happening? I think I am going to need a new carb b/c the fuel filter threads have been stripped and it leaks fuel, so I am wanting to better understand the fuel delivery problem I have and solve it as well. Does the fuel evaporate? or do I possibly have a leak some where? I can not see any fuel pooling outside the carb? If the fuel is leaking into the engine, wouldn't I eventually see/ smell it in the oil? I just did an oil change and the oil was fine.
Any help is, as always, greatly appriciated.
Any help is, as always, greatly appriciated.
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Senior User
Joined: Sep 2004
Posts: 263
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From: FLOWER MOUND,TX
Sounds Like Your Fuel Filter Might Be The Problem...if You Want A Good Look At The Inside You Can Take Air Filter Off And Unscrew The 6 Screws That Hold The Top Air Horn Assy.you Can Start It And Run It Then Turn It Off And Maybe See What Is Happening Inside...good Luck
They Are Easy To Rebuild...but Your Stripped Threads Would First Be Suspect...
They Are Easy To Rebuild...but Your Stripped Threads Would First Be Suspect...
Elder User
Joined: Jan 2004
Posts: 767
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From: Franklin, GA
If the fuel filter threads are stripped to the point that it causes a leak, that is why the bowl is leaking down to nothing. May be slow enough that what leaks out has a chance to evaporate before it can cause a pool to form on the intake. If the threads will hold good enough you might be able to use a gas proof sealant or gasket/o-ring to prevent the leak.
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Senior User
Joined: Sep 2003
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From: Central Texas
How do I check the check valve?
where is the check valve and how do I check it? or is it just a replace item?
I will look for some gas-proof sealant? any suggestions? will AZone have it or should I look elsewhere?
I will look for some gas-proof sealant? any suggestions? will AZone have it or should I look elsewhere?
Elder User
Joined: Jan 2004
Posts: 767
Likes: 1
From: Franklin, GA
The check valve is an internal part of the fuel pump. If it is bad, you'll have to replace the fuel pump. The shade tree way I've checked the pump to see if it has "drain back" is disconnect the fuel line at the carb and used a large syringe with a tapered adapter on the end. Take the plunger out of the syringe and stick the tapered end of the syringe in the open end of the fuel line. Pour gas in the syringe about 3/4 full and see if the gas drains back down the fuel line. If you do this a couple of times (some air may be displaced first) you can pretty much count on replacing the fuel pump.
Most any of the larger chain part stores will have a selection of sealants and o-rings.
Most any of the larger chain part stores will have a selection of sealants and o-rings.
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