Fuel Line Disconnect Tool - AutoZone Using a fuel line disconnect tool helps you disconnect the fuel line from the connector without causing damage. The tools put the right amount of pressure on the connection to disconnect with minimal effort on your part. Many fuel lines only disconnect using the specialty tool.OEM 4 Pcs. Disconnect Set · OEM 6 Pcs. Disconnect Set Amazon: fuel filter tool CTA Tools 2490 Ford 7.3-Liter Fuel Filter Tool for Ford 7.3-Liter. 4.6 out of 5 stars 20. $16 $ 16. 95. Get it as soon as Fri, Aug 16. FREE Shipping on orders over $25 shipped by Amazon. Only 7 left in stock (more on the way).