Man! You are getting all the bad stuff thrown at you. You'll be an expert when your old truck is purring.
After months, Ethanol breaks down to fuel and water components. The additives you buy and pour in the tank may help the engine run on bad gas but it prolongs the misery if you don't get all the old gas out of the system. Water in a stock gas tank causes severe rust, rust in the steel fuel lines and Ethanol dissolves old style rubber fuel hose. Ethanol dissolves fuel pump and carburetor diaphragms. You have to purchase newly made (not NOS) fuel pump and carburetor rebuild kits that are Ethanol tolerant. Most fuel filters catch tiny and larger particles but not water.
I had this problem. I had to replace or rebuild everything from gas cap to carburetor. For example, I pulled the fuel sender out (rusted) and took pictures of the tank (more rust). My advice is to plan now if you want to run Ethanol. If the EPA and like groups push through E20 (long story), matters will get worse. Modern upgrades to old classic vehicles usually get into stainless, hoses made for Ethanol, fuel injection and tank fuel pumps. Our old parts are still safe using non-Ethanol gas but the cost and availability of this fuel can be an issue.
Last edited by buoymaker; 04/23/2022 8:38 PM.
