Cause | Troubleshooting |
Leakage of gas turbine pressurization parts. | 1. Leaky or loose air hose between compressor and inlet pipe or inlet pipe and high pressure fuel pump. 2. Leakage between intake pipe and cylinder head. 3. Inlet pipe flange leak. 4. Loose safety valve clamp or defective O-ring. 5. Leakage between exhaust manifold and cylinder head or turbocharger. |
Turbocharger defect. | Check the boost pressure: if it is too high, although the pressure regulator pipe is not clogged or leaking, then the compressor must be replaced. This means that the boost pressure control valve integrated in the turbocharger is faulty. |
Safety valve defective. | Check the boost pressure: if the boost pressure is too low, disconnect the safety valve hose and plug it. Check boost pressure again. If the pressure is high enough, replace the relief valve. |
Leakage in the charge air enrichment device in the high pressure fuel pump. | Connect the hose to the boost enrichment device and check the boost pressure: when disconnected from the enrichment device, the boost pressure must decrease by about 0.05 bar, then the boost enrichment device is faulty. 1. If the boost pressure does not drop, replace the high pressure fuel pump as the boost enrichment device is not working. 2. If the boost pressure rises despite a pinched boost pressure enrichment device, then this indicates a leak in the membrane or turbocharger housing; replace high pressure fuel pump. |