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Offline zluhcs

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fuel pump fuel line
« on: March 18, 2018, 09:54:52 AM »
just bought 73 pinto. no rubber hoses to the fuel lines from the tank or fuel pump to the fuel lines.  can someone tell me which lines go where?  Which line is the fuel line and which is the return line. Thanks

Offline Pintosopher

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Re: fuel pump fuel line
« Reply #1 on: March 18, 2018, 12:34:13 PM »
Unless the car has a modified fuel system, the Hose coming from the Tank gauge sending unit is the fuel supply to the engine. The other steel line is for the Evaporative (fumes only) to the charcoal canister on the driver side frame rail. The large diameter vapor hose goes to the side of the stock air cleaner housing from the charcoal canister. There is a short rubber hose to the Steel vapor line from the top of the charcoal canister.
 This is only for 71-73 cars, others may vary.
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Offline zluhcs

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Re: fuel pump fuel line
« Reply #2 on: March 18, 2018, 02:34:25 PM »
thank s for the feedback.  i'm still a bit confused.  i know where the line to the vapor canister is, but the two going into the bottom of the tank, one is larger than the other. Is the largest of the two lines the fuel line to the fuel pump?  If it is, it seems to be plugged in the tank. I blew the line from the fuel pump to the tank clear, but with the rubber line disconnected at the tank, I can't blow air into the tank and no fuel will drip out or am I on the wrong line?  thanks for your reply

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Re: fuel pump fuel line
« Reply #3 on: March 18, 2018, 04:19:18 PM »
The Fuel supply steel line from the tank should have the same size steel tubing as the fuel pump inlet. The same applies to the vapor steel line on the tank, and to the top of the vapor canister hose fitting. If you can't get any air to pass into the tank, it's very likely the fuel sender/pickup tube is plugged solid with sludge or corrosion. Get ready to remove that tank (disconnect the battery! Do not ignore this! )After draining the fuel ,you'll have the answer.  Ethanol fuel has massive corrosion issues with any car left undriven for any time beyond a month. Unless a fuel stabilizer was added before parking the car, this will most likely be the issue. The pickup screen may be rusted solid.
 Be prepared to have a tank overhaul or replacement.
 Good luck..
 Pintosopher
 BTW, in most cases, the smaller line is the Vapor line
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Offline zluhcs

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Re: fuel pump fuel line
« Reply #4 on: March 19, 2018, 12:38:16 PM »
thanks for the info. I will get the tank ready for removal and check it out. are there any big surprizes or problems with getting this job done?

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Re: fuel pump fuel line
« Reply #5 on: March 19, 2018, 02:52:40 PM »
Getting the tank drained can be a challenge. After you've disconnected the battery, Make sure all the hoses and electrical are not attached. The Fuel filler neck will be a bit difficult, there is a way to twist it after removing the fender screws and I think there is a strap brace too on the filler neck. Part of the Ford recall fix for the gas tank explosion issue was a longer filler neck that went into the tank further, that does complicate the removal. If you look underneath, there'll be two bolts attached to straps attached  to the unibody behind the rear bumper valance. Remove those with a floor jack and plywood under the tank. If you can't get the filler neck out first, Make sure the car is high enough on jack stands to allow the tank and the filler to clear the bodywork, Move and twist the straps 90 degrees and they should fall out of the unibody along with the plastic shields near the rear axle. Pay close attention to how all this is removed.
 Once you have the tank out from under the car , make every effort to drain any remaining fuel safely. There may be a locking ring holding the Fuel sender unit to the tank, It may not remove easily, usually a brass drift punch to turn it 1/8 turn to release. The filler neck pulls out of the rubber grommet in the side of the tank, It (grommet) may disintegrate when you attempt this, it's usually a throw away item during this work.
 If the rust is bad... Count on the possibility of a replacement  and you'll probably lose the fuel sender/pickup too. There may be a cross reference for another Ford model of this part. NOS is near impossible to find for this piece. My filler neck had rust for quite a bit of the length inside the tank. Another piece to research availablilty.
 This will get you started..
 Pintosopher
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Offline zluhcs

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Re: fuel pump fuel line
« Reply #6 on: March 19, 2018, 03:31:31 PM »
thanks again. I was able to insert a small fine stainless cable into the fuel line (larger of the two fittings) about 9 inches and it stopped dead.  I will be pulling the tank.  This car has been sitting for 15 years or more, but, it has good compression and spark. now all it needs is fuel. I don't know if the car ever had a recall for the tank problem. thanks for all your help.

Offline nnn0wqk

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Re: fuel pump fuel line
« Reply #7 on: March 20, 2018, 10:33:36 AM »
This is what the shield looks like and the end of the filler neck after the recall.

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Re: fuel pump fuel line
« Reply #8 on: March 22, 2018, 03:13:57 PM »
thanks for the pics. this site is the best. I couldn't fix this car without all of your help

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Re: fuel pump fuel line
« Reply #9 on: March 25, 2018, 10:36:57 PM »
Well, got the tank out. drained and rinsed alot, but tons of rust, no leaks. Where can I find a sending unit assy. Is there a way to get rid of the rust. Also, is there a good aftermarket carburetor that can be used and eliminate some of the hoses and misc or is it better to stick with the stock style carb. Any help would be greatly appreciated. 

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Re: fuel pump fuel line
« Reply #10 on: March 26, 2018, 01:18:51 AM »
Radiator shop may be able to help. I have cleaned them using washing soda and electrolysis process. Do a google search. It works well and is cheep. Have used it to clean rust in places you normally can not get to. It is slow though so keep that in mind.

Offline dick1172762

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Re: fuel pump fuel line
« Reply #11 on: March 26, 2018, 01:46:07 PM »
I have heard of people putting rocks / nuts / any thing that go inside the tank / and shake the tank to brake the rust loose. Do a google for more info and help.
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Offline zluhcs

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Re: fuel pump fuel line
« Reply #12 on: March 28, 2018, 08:46:36 PM »
Thanks for everybody's help.  Here's a carb question. I need to rebuild the carb or buy another for lots of money or get a weber conversion. How hard is it to get rid of the pollution stuff and the water choke assy.  Do the weber aftermarket carb kits work OK?. Any ideas would help alot thanks, R S