what to do ?
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Junior User
Joined: Aug 2012
Posts: 79
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what to do ?
Hello, I have a problem that affects my truck when it sits for a while. If i let it sit for a week it takes a while to crank. It seems the gas evaporates or just fall back to the gas tank . I literally have to crank it for a while until the gas reaches the carburetor . Sometimes it seems that the car battery is about to die then god saves me and it cranks . Once it start it all good .If i use it back to back it's good. It only happens when it sits for a while. . I've been thinking about installing an electric fuel pump inline to prime the line then crank it. Any suggestion, ideas, or what do you guys do . I have other vehicles so i don't drive the truck all the time. Sometimes it sits for a couple weeks.
Tuned
Joined: Dec 2017
Posts: 308
Likes: 8
To my knowledge this is just something that happens if you have a carburetor and a mechanical fuel pump. As for the cranking slowing down, that might be a problem with your battery, I'm not sure.
If you want it to crank faster, it might be beneficial to crank it for a few seconds, pump the gas again, and then crank it more, since you might have a little bit of gas in the carburetor which you can use to prime it after that first crank.
If you want it to crank faster, it might be beneficial to crank it for a few seconds, pump the gas again, and then crank it more, since you might have a little bit of gas in the carburetor which you can use to prime it after that first crank.
FTE Legend
Joined: Nov 2015
Posts: 30,906
Likes: 4,122
From: Angier, NC
I have not had mine running much and only from a 2 gal can under the hood so I can only move the truck in/out of the garage.
Use the right size hose! I tried a little larger hose (3/8) from under hood can to fuel pump and it would not pick up fuel. Put the right size on (5/16) and it picked up fuel so a little pin hole can be an issue.
I also changed out the fuel pump as it went thru 2 gal of fuel in no time, thinking it went to oil pan. The carb was also rebuilt as the PO messed it up.
The last time I started the truck it sat for at least a week, pump the pedal 2 times and it fired right up and the choke is not set right as I need to figure out how to rig up the heating side yet.
So hose first then maybe fuel pump ($20) if a carb rebuild kit think was $25 then you know the fuel system is good other than tanks.
Dave ----
Moderator
Joined: Jan 2001
Posts: 56,983
Likes: 2,736
From: Virginia
We have had this question several times recently for various different setups, and the common cause is the emissions port on top of the carb bowl has been taken off and is open. Mine did the same thing and taking this large hose off the top of the carb and went to the charcoal canister is what was causing my long cranking after it sat around.
You can try plugging this port if you have it, and see if it helps the problem. If you have hard starting in hot weather with the port plugged, then you may have to do something else, possibly put the emissions hose back on it. The factory had valve in this line which opened and closed the line depending of the engine was running or not.
P.S. I was looking at some 300 six carbs and did not see this port I am talking about, so you might not have it.
You can try plugging this port if you have it, and see if it helps the problem. If you have hard starting in hot weather with the port plugged, then you may have to do something else, possibly put the emissions hose back on it. The factory had valve in this line which opened and closed the line depending of the engine was running or not.
P.S. I was looking at some 300 six carbs and did not see this port I am talking about, so you might not have it.
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Cargo Master
Joined: Dec 2004
Posts: 3,362
Likes: 22
From: Florence, SC
Hello, I have a problem that affects my truck when it sits for a while. If i let it sit for a week it takes a while to crank. It seems the gas evaporates or just fall back to the gas tank . I literally have to crank it for a while until the gas reaches the carburetor . Sometimes it seems that the car battery is about to die then god saves me and it cranks . Once it start it all good .If i use it back to back it's good. It only happens when it sits for a while. . I've been thinking about installing an electric fuel pump inline to prime the line then crank it. Any suggestion, ideas, or what do you guys do . I have other vehicles so i don't drive the truck all the time. Sometimes it sits for a couple weeks.
1. - Put your key in the ignition and turn it forward until you hear the buzzer.
2. - Push the gas pedal all the way to the floor and release it FOUR TIMES.
3. - With your foot off the gas pedal, start the engine.
That *should* start it right up. It works on mine every time.
* If the engine doesn't immediately start, do not keep cranking the engine over. Stop, push the pedal to the floor and release one more time, and try again.
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FTE Legend
Joined: Nov 2015
Posts: 30,906
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From: Angier, NC
I have not used the elect. pump to prim first.
I just pump it a few times then try and see if it starts. If not I let starter cool a bit and pump a few more time and try again.
BTW I checked my can under hood today and it is almost empty and I am sure it had more in it than it dose, evaporation is all I can say.
Dave ----
I just pump it a few times then try and see if it starts. If not I let starter cool a bit and pump a few more time and try again.
BTW I checked my can under hood today and it is almost empty and I am sure it had more in it than it dose, evaporation is all I can say.
Dave ----
Moderator
Joined: Jan 2001
Posts: 56,983
Likes: 2,736
From: Virginia
Ford never needed something like that when they left the factory? I don't like the idea of the factory pump trying to pull fuel through a electric pump that is off. And if you leave the electric pump on, there is a danger of it pumping fuel into the engine if the factory pump diaphragm ever ruptures. It's happened.
Moderator
Joined: Jan 2001
Posts: 56,983
Likes: 2,736
From: Virginia
Do you have any rubber fuel line up near the carb? If you do, what would happen if you got the engine running, turned it off and then took vise grips and pinched the line shut, and then let it sit. Then see what happens after a couple of weeks. If it still won't start after you release the vise grips, then it must be evaporation of the fuel out of the carb.
Tuned
Joined: Dec 2017
Posts: 308
Likes: 8
Dave, can you explain a little more which port on the Carter YFA is the emissions port? I have a couple vacuum ports that are not wired to anything, and my truck takes a few seconds to start if I let it sit a week, yet it will start first crank any other time. I think my gas is evaporating out something; I figured it was normal!
Cargo Master
Joined: Dec 2004
Posts: 3,362
Likes: 22
From: Florence, SC
It takes just as long for an electric fuel pump to prime the carburetor as it does for your foot to pump the gas pedal to prime the carburetor.
It is normal for the carburetor to lose pressure and some fuel evaporation to occur after the engine sits for a week. Again, use the proper starting procedure and the engine should still start right up with the first crank.
Moderator
Joined: Jan 2001
Posts: 56,983
Likes: 2,736
From: Virginia
Dave, can you explain a little more which port on the Carter YFA is the emissions port? I have a couple vacuum ports that are not wired to anything, and my truck takes a few seconds to start if I let it sit a week, yet it will start first crank any other time. I think my gas is evaporating out something; I figured it was normal!
