Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [header] How to clean a fuel filter [title] Relieve the pressure in your fuel system. [step] Check your owner's manual to find the fuse for your fuel pump. Remove it, then start your engine and let it run for 1 to 2 minutes.

Ending1: It might sputter out before the time's up, which means the pressure is relieved. [substeps] While the engine might sputter out, this isn't necessary to relieve the pressure. Ending2: This will loosen all loose gaskets on the oil filter, which is called a api. [substeps] The api contains a small plate with a safety pin. Ending3: The fuel pump is usually located on the back of the dash. [substeps] Twist the chain of the fuel pump a few times to help the engine turn, then put some fuel in the filter. Ending4: Once the engine has warmed up, lower your control wick. Once it turns off, restart your engine.

Answer format: ending1/ending2/ending3/ending4