My 95 z28 has been sitting for a very long time with a bad fuel pump. Finally was able to remove the tank and inspect it. Total carnage! Pump is destroyed inside. There is a lot of rust and other debris inside. My question is what are some good techniques or products that may help me get this tank cleaned up from the inside. I've done a few rinse and drains on the tank itself with some detergent and vinegar and water mix. I also have a delphi tank cleaning kit, but didn't want to use it right away due to the large amounts of debris inside. Let me konw. Any input is appreciated.

 

I have only done that job on smaller motorcycle gas tanks. On a car gas tank, I would simply go for a replacement gas tank (used, if a good one is available). If your gas tank has internal baffles, clean-up will be very difficult, no matter what. For my clean-up, a length of cheap light chain is used as an "agitator" inside the tank, with solvent, and any remaining rust is to be electrolyzed into inert matter (not rust) later. To me, the time and hassle to save a rusty car gas tank is just not worth it. I would not trust the results long-term, even if the tank got a good quality of inside coating (epoxy-type) after the clean-up.

FWIW, I believe this problem is caused by ethanol-gas, and the water that it holds in suspension. As for prevention, you can buy non-ethanol gas from a surprising list of sellers, but not the cheap-gas folks at the corner convenience store. Premium not-ethanol may still be scarce, and if pennies per gallon will change your choice of gas stations, this option is not "realistic" for you. Non-ethanol gas typically costs about a quarter-dollar more per gallon, but maybe you won't be changing out gas tanks in a few years. Find non-ethanol locally:
https://www.pure-gas.org/
HTH.
.

 

There's a member here who swapped a factory plastic tank from an LS1 F-Body into an LT1 F-Body:

https://www.camaroz28.com/forums/lt1...l-tank-886314/

 

I managed to clean it up decently. But the time and effort spent probably are not worth the price of a replacement tank. I'm happy with the result but something to consider to those having similar issues.
now to figure out the evap canister lines that I didnt take note of before my son removed them.

 

https://www.camaroz28.com/g/picture/8154458

https://www.camaroz28.com/g/picture/8176783