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I currently have an 84 f150 5.0. It has been sitting for 4 years not driven. I am currently getting it bad up and running. But I'm having issues. I got i to crank and run but after i got it on the road it ran fine till about 5 mins into the drive and it started to act like it was not getting gas.
So far i have installed a new fuel pump and dropped and emptied the fuel tank. But it still happening please help. I'm thinking i need to rebuild the carb
Good eye. I hadn't noticed that. Yeah, that filter looks pretty crusty.
That fuel line looks ancient, too. Sometimes old hoses can swell up internally and restrict fuel flow, even though the outside looks fine. I'd replace that hose along with the filter.
After replacing the filter, carefully cut open the old one with a pipe cutter. See what kind of crud has collected inside. This should give you an idea of the tank's condition.
Yes. It's a Motorcraft FG795A. Any parts store should have that filter or an equivalent.
The fuel line between the pump and filter (at the carb inlet) was originally all metal with threaded fittings at both ends. It looks like somebody cut off the line and retained a short length with the threaded fitting at the filter. This short piece was used to connect to a piece of flex hose in lieu of the original metal line.
If needed, the auto parts store will have a barbed fitting that you can use to put the hose on. I use teflon pipe tape to seal the threads. Just be careful not to get any tape over the end of the fitting that may/can be pushed into the fuel line. It's really not that hard to do a neat tape job. I have never had good luck with the paste stuff some use.
Do not try to over tighten the filter going into the carb... someone seems to have done that on here a few days ago... If there's a small leak you can always tighten it a little more, once you've gone too far you can crack the carb.
General rule for teflon tape is 4 wraps on a fitting that size. Make sure you wrap the tape in the tightening direction so the fitting thread in nicely.
If needed, the auto parts store will have a barbed fitting that you can use to put the hose on. I use teflon pipe tape to seal the threads. Just be careful not to get any tape over the end of the fitting that may/can be pushed into the fuel line. It's really not that hard to do a neat tape job. I have never had good luck with the paste stuff some use.
Do not try to over tighten the filter going into the carb... someone seems to have done that on here a few days ago... If there's a small leak you can always tighten it a little more, once you've gone too far you can crack the carb.
General rule for teflon tape is 4 wraps on a fitting that size. Make sure you wrap the tape in the tightening direction so the fitting thread in nicely.
Like Karl said that fitting going into the fuel filter may be a flare fitting. So a regular pipe thread barb would probably not fit very good. I would keep what he has, it only has 5 or 6 psi on it. If he puts new hose on it, make sure to use hose rated for fuel.
Like Karl said that fitting going into the fuel filter may be a flare fitting. So a regular pipe thread barb would probably not fit very good. I would keep what he has, it only has 5 or 6 psi on it. If he puts new hose on it, make sure to use hose rated for fuel.
Good point. No thread tape needed for that type fitting. I was playing with some pipes around the house earlier today and used teflon tape.
I was playing with some pipes around the house earlier today and used teflon tape.
Well, along that line of thinking, this morning I had toast with peanut butter. Notice I did not recommend the use of peanut butter anywhere on his vehicle.
Well, along that line of thinking, this morning I had toast with peanut butter. Notice I did not recommend the use of peanut butter anywhere on his vehicle.
OP - If you are replacing the line between the fuel pump and carb anyways, you might as well cut in a clear plastic fuel filter for future visuals. You already emptied the tank, but there may be rust/grit still washing around in there. Disassembling that factory fuel filter to check for debris (at least on the 351) is a PITA.
Second thought - after running for a bit where the truck begins to bog out, go open the gas cap. If you hear a significant sucking sound, the fuel system isnt venting and not permitting the gas to flow properly.
Third thought - unless the prior owner was a card-carrying seafoam junkie, that gas in the carb is a gummy, funky mess and it should be rebuilt.
Good luck w a great project. cheers.
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