Mitsubishi — Fuel System Air Bleeding
Maintenance
From a Mitsubishi owner's manual — check it applies to your exact model before use.
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Before you start
- If air is left in the fuel line the engine cannot be started.
Procedure
- Fill the fuel tank to the proper level.
- Loosen No. 1 air vent screw of the fuel filter; tighten when fuel flows free of air.
- Loosen No. 2 air vent screw, bleed until no air is noticed, then tighten.
- Loosen the fuel pump air vent screw and let fuel overflow until no bubbles, then tighten.
- If the engine still will not start, loosen the injection nozzle nut.
- Shift throttle to high speed and crank engine until fuel discharges at the loosened nozzle connection.
- Tighten the nozzle nut to the specified torque.
Source: Mitsubishi owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.