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hdfatboy2005
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| | Posted: Wed Jun 17, 2015 11:34 pm Post subject: 1970 Ford 3400 3 cyl not getting gas | I have a 1970 Ford 3400 3 cyl gas tractor. Looking for some help. The tractor starts right up no problem, I don't even need to choke it. Just recently tractor is running and I give it some gas and it spits and sputters. Then it gets running ok. But when I put it in gear and start moving it spits and sputters again and dies out. I put in a new in fuel filter, cleaned the tank and just seems like I am not getting enough gas, to get it to run properly. Any ideas please?
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Sean in PA
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Joined: 27 Feb 2008
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Location: Southeast PA
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| | Posted: Thu Jun 18, 2015 4:05 am Post subject: Re: 1970 Ford 3400 3 cyl not getting gas | To prove that it's getting gas, disconnect the fuel line where it goes into the carburetor. Some fuel will come out when you first disconnect the line but it should slow to a drip after a few seconds. Then use the key to make the starter spin the engine. The fuel should come out of the line in pulses as the engine spins due to the nature of the mechanical fuel pump that runs off of a lobe on a shaft inside the engine. If you're getting good pulses of fuel as the engine spins then fuel is getting to the carb, and your problem is most likely in the carb itself.
Those 3 cylinder gassers do not normally start when cold without some choke, so starting easily when cold without the choke means that the carb is adjusted too rich or the choke plate inside the carb is stuck at least partially closed even if the external choke linkage looks like it's moving.
Also, you said 'I put in a new in fuel filter'. Did you mean 'in-line fuel filter'? If so, get rid of that. That tractor came from the factory with 3 or 4 fuel filters in the system, and none of them were an in-line filter. The first filter is a screen on top of the shutoff valve up inside the tank. The second filter is another screen inside the top of the mechanical fuel pump up on the front of the engine. The third filter is inside the top of the sediment bowl and it looks lime a stack of washers. The fourth filter, if it has one, is inside the fitting where the fuel line attaches to the carburetor.
Last edited by Sean in PA on Thu Jun 18, 2015 4:10 am; edited 1 time in total |
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hdfatboy2005
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| | Posted: Thu Jun 18, 2015 5:33 am Post subject: Re: 1970 Ford 3400 3 cyl not getting gas | Sean in PA
Thank you for replying...
There is no fuel pump on this tractor. It is a gravity feed system. I traced the whole fuel line and it goes down the right side of the engine block, across the top of engine then down the side and then across the botom of engine and back to the carb. Crazy long run..
Ok it does start very easy no matter what the temp is. I will look at the carb.
Yes I did mean a in-line fuel filter. There is no fuel pump, no sediment bowl. I took the fuel shut off out of tank and I did see the screen on the fuel shut off but other then that it goes to the in-line fuel filter and into the carb.
As of right now, I order the new shut off and waitng on that.
Here is a crazy situation. I was taking of the sheet metal peice under the sterring wheel so I could spin the fuel shut off from the tank, and the sheet metal hit the hydraulic power steering line and it ARCED. It basically welded a hole right in the power steering line. Oil started running out of hole.I was like WOW... I had a guy working on the worm gear for the steering column and he didn't hook up the 2 wires going to the transmission properly and bang put a hole in the line.. I was not happy.. How about if I had the gas leaking down when it arced.. NICE.
Thanks for the help
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Ultradog MN
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Joined: 22 Apr 2001
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Location: Twin Cities
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| | Posted: Thu Jun 18, 2015 8:07 am Post subject: Re: 1970 Ford 3400 3 cyl not getting gas | That's a tough lesson.
I never work around the steering, starter, carb or electrical without First disconnecting the battery - especially on a gasser.
Below is a photo of the fuel pump and lines as they should be on your tractor.
They do like a fuel pump.
I have one that is running on gravity and it is giving me problems. I have the parts and am going to put it back to original.
Another option is to install a small electric between the fuel tap on the tank and the inline filter.
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old
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Joined: 12 Mar 2000
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Location: Lake of the Ozarks area of MO
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| | Posted: Thu Jun 18, 2015 9:17 am Post subject: Re: 1970 Ford 3400 3 cyl not getting gas | In line fuel filter?? Did it come with one when new?? If it did not that is likely to be where your problem is since many in line filters are made to have a fuel pump pushing the gas. I have removed countless number of them to fix engine run problems over the years. The sediment bowl and any other factory filter is all one ever needs
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hdfatboy2005
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| | Posted: Thu Jun 18, 2015 9:37 am Post subject: Re: 1970 Ford 3400 3 cyl not getting gas | I think it was put in when my grandfather had it, my cousin might of put in.
I will remove filter and is it ok to put a rubber hose where the in line filter was?
Thank you for the info
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old
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Location: Lake of the Ozarks area of MO
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| | Posted: Thu Jun 18, 2015 9:47 am Post subject: Re: 1970 Ford 3400 3 cyl not getting gas | As long as it is not close the a real hot area the rubber hose will be just fine. One neighbor had a problem like that on a Farmall B he had. I asked him on the phone about the inline filter and he told me it was ok. W@ell he still could not get it to run like it should. So he asked me to come look at it. I did and took hose with me just in case. Pulled the filter off installed the hose and it fired right up and ran just fine. Couple years later I bought and sold it to a guy in the land down under
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Ultradog MN
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Location: Twin Cities
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| | Posted: Thu Jun 18, 2015 10:06 am Post subject: Re: 1970 Ford 3400 3 cyl not getting gas | Rich,
Keep in mind that a 3 cyl is a cross flow engine.
Carb/fuel on the starboard side and exhaust on the port.
So not much chance of a hose getting hot.
Still, I'm sure you'll agree it's not the best idea to put rubber fuel lines on a tractor.
Especially on a gasser.
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hdfatboy2005
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| | Posted: Thu Jun 18, 2015 10:07 am Post subject: Re: 1970 Ford 3400 3 cyl not getting gas | OK great.
There are already 2 hoses on each side of the in line filter, it should be good then.
I will take care of that asap..
Thank you the help
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hdfatboy2005
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| | Posted: Thu Jun 18, 2015 10:10 am Post subject: Re: 1970 Ford 3400 3 cyl not getting gas | I got ya.
Can a get tubing and couplers with compression fittings?
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old
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| | Posted: Thu Jun 18, 2015 10:10 am Post subject: Re: 1970 Ford 3400 3 cyl not getting gas | Most of my tractor have rubber hoses on them but then they are not fords and there on them due to rusty fuel tank and that makes it easy to back blow the lines when needed.
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old
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Location: Lake of the Ozarks area of MO
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| | Posted: Thu Jun 18, 2015 10:15 am Post subject: Re: 1970 Ford 3400 3 cyl not getting gas | The best way to fix it is with brake line. Just buy a piece that is a bit to long and bend as needed to fit. The couples on them if you take you old one with you can be matched up pretty easy.
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hdfatboy2005
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| | Posted: Thu Jun 18, 2015 10:16 am Post subject: Re: 1970 Ford 3400 3 cyl not getting gas | Yes it was, I don't jump much but that made me jump..HAHAH
I will disconnect the battery from now on, that is for sure.
The photo didn't load but I am at work so this computer might not let me download or see pictures.
I will check this photo out when I get home and I will let you know if I can see it.
Thank you
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hdfatboy2005
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| | Posted: Thu Jun 18, 2015 10:19 am Post subject: Re: 1970 Ford 3400 3 cyl not getting gas | OK I might try the rubber first.
If I need to I'll switch to metal lines.
Thank you
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hdfatboy2005
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| | Posted: Thu Jun 18, 2015 3:28 pm Post subject: Re: 1970 Ford 3400 3 cyl not getting gas | OK I completely missed that.
Awesome picture thank you
When I get the fuel shut off and put it in the tank I will try to disconnect line and see what comes out.
Thanks again
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