Major Gas Problems

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poolnut

Member
I bought a 29 pickup and it ran real good until i filled it up with gas It started backfiring something awful Rust in carb, cleaned it put inline gas filter in and still have same problem Is there anyway to get the rust out of the gas tank without taking it out of the truck I would have no idea how to go about that Im at my wits end at what to do Its a nice looking roadster pickup that the top comes off and i would really like to get it running but if i cant i recond i will have to let it go Thanks for any info
 
You can put in a dirty leg filter.Thanks to Tim Kelly for info.
 

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Sounds like the ethanol content in your gas may have loosened some debri, you could try a dirty leg mounted inline before the filter. Dirty leg catching the bigger particles and the filter the small ones. I would add a can of sea foam to the tank as well.

You may need to drain the tank and either refill with different gas or strain what you have. A good carb cleaning could help remove what may have made it there.
 
I would drain and strain as Steve mentioned and I would add a stand up filter in the cut off valve inside the tank. All of the model A vendors have them. I would avoid the micro filter because small particles will block them completely.
 
Gary WA ............................
Where would you find a "Dirty Leg Filter" ? That sounds like a good idea, to me.
MIKE :)
 
Put about four gallons of gas in tank. slosh it around by shaking the car. drain through a rubber hose into a container with a cloth strainer on top. pour the gas back in the tank and do it again. When you stop getting rust in the cloth strainer, hook everything back up. install the inlet screen as suggested above, and a speaker magnet stuck under the tank near the outlet can't hurt. I did this on my roadster over ten years ago. No trouble since.
 
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All good advice above and I find flushing the tank several times and adding the brass screen to the shut off valve cures most dirty gas tank problems.
Don't overlook a rust filled sediment bulb. This is a spare I picked up at a swap meet. I forgot to install the lock washer and drain valve for the last picture. The brass screen was missing from this sediment bulb when I boought it, but they can be bought from most Model A parts houses.
Do you have a new filter inside the carb inlet also?
 
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I have been fighting a rusty tank for years. They are hard to clean because of the baffles. I have had it to a radiator shop for cleaning. I have one of those stand pipe filters in the fuel shut off valve. They keep the big chunks out. I run a see through inline filter between gas shut off valve and the sediment bowl on the fire wall. The inline filter gets dirty and needs changing about every six weeks.

I wish somebody would reproduce Model "A" tanks. They would probably be expensive but I think there is a market.
 
I think I will try one of these days. I think I will keep the in line filter too but maybe remove my stand pipe filter in the shut off valve. The rubber hoses on the inline filter may reduce the flexing of the copper line.

There is probably no flexing of the copper fuel line between the gas shut off valve the sediment bowl. There is probably no differential movement. A person could use an original type line to solve this concern. A copper will not tolerate a lot of cyclic loading. The 18 foot copper line mentioned in the attachment probably indicates the fancy car frame did not twist.
 
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sturgis 39 said:
I think I will try one of these days. I think I will keep the in line filter too but maybe remove my stand pipe filter in the shut off valve. The rubber hoses on the inline filter may reduce the flexing of the copper line.
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Some of those "in line" fuel filters are designed for use with a pressurized fuel line. Make sure that the gravity flow of the Model A fuel tank isn't restricted by your "in-line" fuel filter.
 
Geo. H said:
Put about four gallons of gas in tank. slosh it around by shaking the car. drain through a rubber hose into a container with a cloth strainer on top. pour the gas back in the tank and do it again. When you stop getting rust in the cloth strainer, hook everything back up. install the inlet screen as suggested above, and a speaker magnet stuck under the tank near the outlet can't hurt. I did this on my roadster over ten years ago. No trouble since.
Click to expand...

Like Geo. H, I have made out rather well with the slosh and siphon technique. I have even tossed in a length of chain to help scrub.

If you siphon with a rigid hose, and a can see in the tank, that siphon line can be used like a vacuum cleaner.
 
Just want to thank EVERYONE for all the help that i have received since i got my 29 Im sure i will be calling on everyone again since i know very little about my truck Thanks again
 
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