What to do if your fuel filler neck is leaking?
What to do if your fuel filler neck is leaking? Part 1 of 5: Verifying the fuel filler neck condition Step 1: Locate the fuel filler neck. Step 2: Determine if the fuel filler neck is leaking vapors. Step 1: Park your vehicle on a flat, hard surface. Step 2: Place wheel chocks around the tires. Step 3: Install a nine volt battery saver into your cigarette lighter. What causes a fuel filler neck to rust? Inside the fuel filler neck, there is a one way valve that prevents any object from entering the fuel tank, like a syphon hose....