Prolonged rubbing of the fuel line against the intakemanifold could cause a fuel line leak, and result in an engine compartment fireif the leaking fuel line is exposed to a source of ignition.
Fuel System, Gasoline — Delivery — Hoses, Lines/Piping, And Fittings
Metal fuel lines with an incorrect Contour were installed in the engine compartment. The incorrect Contour can cause the metal fuel line to rub against the intake manifold.