Ford 4L8Z-6758-BA Tube Assembly

When working with fuel hoses, be prepared to catch spilled fuel, as fuel lines are typically pressurized. Examine all flexible fuel lines for signs of deterioration, chafing, and cracks, especially near bends and fittings. When replacing fuel hoses, use hose specifically designed for your fuel injection system. Replace spring-type clamps with screw clamps, and use a special tool for spring-lock type couplings.

The PCV system reduces hydrocarbon emissions by scavenging crankcase vapors. It circulates fresh air from the air cleaner through the crankcase, mixes it with blow-by gases, and reroutes it through a PCV valve to the intake manifold.