When working around any part of the fuel system, take precautionary steps to prevent fire and/or explosion:
Disconnect the battery terminal from the battery (except when testing with battery voltage is required).
When ever possible, use a flashlight instead of a drop light. Even a few drops of cold fuel on a hot light bulb can cause the bulb to explode and start a fuel flash fire.
Keep all open flame and smoking material out of the area.
Use a shop cloth or similar to catch fuel when opening a fuel system.
Relieve the fuel system pressure before servicing.
Use eye protection.
Always keep a dry chemical (Class B) fire extinguisher near the work area.