So i recently purchased a 1989 f150 with a straight 6 and a 5 speed manual tranny......the rear gas tank had a whole in it and was halfway filled with old gas....and the main tank had old gas and sludge on the sending unit...i know i will be replacing both sending units but the front tank is there anything i can do to clean it out and use it again theirs no damage to it. I already got a used rear tank for $14 that basically brand new. I heard using a power washer with a little simple green, or baking soda and vinegar but was wondering if anyone has had to deal with this or just replaced the tank .

 

If it's really bad I would just replace it. Did you see any good deals for a front tank?

 

i found the rear tank at a pick in pull but they usually put a hole in all the tanks i was lucky and found one without a hole but it was full of gas but the gas was still really good gas

 

also second question i know the factory stock sending unit has the big plastic what im assuming is the fuel pump am i ok with using a different sending unit that doesnt have that plastic piece or do i need to find the exact one

 

Click these & read the captions:

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The tank plate with the tubes coming through must match (or BE) the original so that the original (-style) fuel pump can be mounted.

OR... You'd have to swap BOTH tank plates & all the fuel lines to the '90-91 FDM (high-pressure) style.

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