Ford XL1Z-9F792-DG
Fuel Rail

Service personnel must keep away all lighted items such as tobacco and open flames from fuel components because highly flammable mixtures present in the rail could result in personal injuries. When working with fuel lines and components always relieve the fuel system pressure before separation because fuel pressure remains elevated when the engine shuts off. You must start by reducing fuel pressure before taking out the upper intake manifold with proper fuel line plugging procedures for leak prevention. Start by removing fuel lines and disconnecting and labeling the fuel pressure regulator vacuum hose as well as eight fuel injector electrical connectors on one side first because the other side has similar connections. You must detach the fuel injection supply manifold together with attached fuel injectors after removing its bolts. Visual examination of fuel injectors begins by taking them out from the fuel injection supply manifold then inspecting their O-ring seals before installing new O-ring seals when needed. While restoring the system follow the reverse steps of removal while using clean engine oil to lubricate and install the new O-rings.

It is essential to follow safety precautions before servicing the fuel injection supply manifold because highly flammable fuel mixtures exist during the process while pressurized fuel remains even when the engine stops. The first step should involve reducing fuel pressure before taking off the upper intake manifold while sealing the fuel lines once separated. You should proceed by removing both fuel lines alongside the fuel pressure regulator vacuum hose. Unplug each of the eight fuel injector electrical connectors while keeping in mind that the left-side configuration serves as an example although the right side matches it. You need to detach the fuel injection supply manifold that includes all its fuel injectors using bolt removal. To complete the task inspect both seals on each fuel injector before replacing worn seals with new ones. Clean engine oil should be used to lubricate the new O-rings before installation by following the opposite order of removal steps for proper fitting.