Sugar/Antifreeze in My Windstar 2000 Gas Tank

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I would try Berryman's B-12 Chemtool in the metal can.
It is one of the least expensive of the fuel system cleaners, but it is about the strongest cleaner on the shelf.
This is a solvent based cleaner, whereas most are detergent based.
While it is not a cleaner to run all the time, this is a good cleaner attack the stuff that the other cleaners have left behind.

Is there any antifreeze still in the tank?

You need a cleaner that is able to dissolve Ethelyne Glycol (the main ingredient in antifreeze), yet compatable with gasoline. While such a solvent is an unusual request, carb/injector cleaners may do the trick... I don't know enough about these chemicals to say. In particular it may be a effective way to clean any dried glycol residue from the injectors.

Meanwhile, we do know that antifreeze is water soluble, and we know that there are fuel additives that can remove water (i.e. Dry Gas) from gasoline. Gasoline drying agents are normally made from alcohols that disolve water. Gasoline that contains ethanol is another option, since ethanol will also mix with water. Many stations sell fuel that is 10% ethanol, which means a 10 gallon fill-up will contain 1 gallon of ethanol.

As an experiment, you could try adding a small amount of raw (concentrate) antifreeze to various solvents and see which ones mix well.

I would try Berryman's B-12 Chemtool in the metal can.
It is one of the least expensive of the fuel system cleaners, but it is about the strongest cleaner on the shelf.
This is a solvent based cleaner, whereas most are detergent based.
While it is not a cleaner to run all the time, this is a good cleaner attack the stuff that the other cleaners have left behind.

I tried it last night, let it sit in it overnight, and already I'm seeing an improvement. It stopped loping, which it was doing. Thank you! Still somewhat rough idle. Anything else I can do? What dissolves antifreeze?

Is there any antifreeze still in the tank?

You need a cleaner that is able to dissolve Ethelyne Glycol (the main ingredient in antifreeze), yet compatable with gasoline. While such a solvent is an unusual request, carb/injector cleaners may do the trick... I don't know enough about these chemicals to say. In particular it may be a effective way to clean any dried glycol residue from the injectors.

Meanwhile, we do know that antifreeze is water soluble, and we know that there are fuel additives that can remove water (i.e. Dry Gas) from gasoline. Gasoline drying agents are normally made from alcohols that disolve water. Gasoline that contains ethanol is another option, since ethanol will also mix with water. Many stations sell fuel that is 10% ethanol, which means a 10 gallon fill-up will contain 1 gallon of ethanol.

As an experiment, you could try adding a small amount of raw (concentrate) antifreeze to various solvents and see which ones mix well.

I tried every STP one ,and only the STP White bottle Carb Cleaner seemed to help ,and then failed. Sea Foam worked, then stopped working, and I then tried the Berryman's B-12. It has mostly stopped.

Thank you for the post! Do you think, being as it has been 1 month, trying to flush anything or dropping the tank is feasibly worthwhile?

A helpful neighbor, who lives by my parent's house, and has owned over 120 cars in his life, suggested just pouring rubbing alcohol in to see what it does, like a pint or quart. Try that, or continue with the Berryman's?

Anything else to try? and thank you all in advance for the help!