Cause of malfunction | Elimination of defects |
Leakage of structural parts of the turbocharging system and exhaust gases | Leak test: a) the air pipe between the supercharger and the intake manifold or between the intake manifold and the fuel pump is leaking; b) leak between intake manifold and cylinder head; V) leaky flanges near the intake manifold; G) the clamp at the pressure relief valve is weak or the sealing ring is defective; d) Leakage between exhaust pipe elbow and cylinder head or turbocharger. |
Faulty boost pressure regulator | Check boost pressure. If it is too high, replace the regulator (if the control line to the boost pressure control valve is not clogged and there is a leak). |
Defective pressure relief valve | If the boost pressure is too low, remove the hose leading to the pressure relief valve and plug it. Repeat measurement of boost pressure. If the pressure is now high enough, replace the pressure relief valve. |
Fuel regulator insufficiency (in the fuel pump) | Close the hose leading to the regulator, check the boost pressure. Disconnect the regulator clamps, then the boost pressure should drop, as the regulator is not working. If the pressure does not decrease, replace the fuel pump as the regulator is not functioning. If the boost pressure increases despite the disconnected regulator, then this indicates a leak in the membrane or regulator housing, in which case the high pressure fuel pump must also be replaced |
Visitor comments