Lancer Evolution L4-2.0L Turbo (4B11T/C) (2010)
(Part 2)
15. Stop the engine and observe fuel pressure gauge reading. It is normal if the reading does not drop within 2 minutes. If it does, observe the rate of
drop and troubleshoot and repair according to the table below. Start, then stop the engine.
1. Squeeze the fuel return line closed to confirm leak-down occurs from defective fuel pressure regulator.
2. If pressure continues to drop with fuel return line squeezed closed, injector(s) or fuel pump are leaking.
16. Release residual pressure from the fuel pipe line.
WARNING: Cover the hose connection with shop towels to prevent splash of fuel that could be caused by some residual pressure in the
fuel pipe line.
17. Remove the fuel pressure gauge and special tool from the fuel rail.
18. Fit the fuel high-pressure hose to the fuel rail.
19. Check for fuel leaks.
1. Use scan tool MB991958 to operate the fuel pump.
2. Check the fuel line for leaks and repair as needed.
20. Disconnect scan tool MB991958.