Describe one way to bleed pressure from a fuel system.
What will be an ideal response?
The following is a very simple procedure for bleeding pressure from a fuel system:
1. Disconnect the fuel pump electrical connector or remove the fuel pump relay or fuse.
2. Crank the engine briefly to drop the fuel pressure or run the engine until it stalls.
Another pressure bleeding procedure is to:
1. Disconnect the battery ground cable.
2. Remove the filler cap from the fuel tank.
3. Some systems have a Schrader valve that can be used to bleed off pressure from the system before disassembly. (A Schrader valve is the kind found on tire valve stems.) Remove the threaded cap from the fuel pressure test port on the fuel rail to find the Schrader valve.
4. Use a special hose that has a pressure relieving tool on the fuel rail end to drain fuel to a gas can.
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