Symptom Tree t058
| Cause | Correction |
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Fuel rate okay, fuel pressure okay, intake manifold pressure low |
Excessive intake air restriction, exhaust restriction, air intake or exhaust leaks, turbocharger wheel clearance, charge air cooler restriction or leak. Refer to Procedure 010-031, 011-009, and 010-027 in the Troubleshooting and Repair Manual, ISM, ISMe, and QSM11 Series Engines, Bulletin 3666322. |
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Fuel rate low, fuel pressure okay, intake manifold pressure low |
Compare the calibration stored in the electronic control module (ECM) with the engine rating and the Control Parts List (CPL), Bulletin number 3379133 or 4021327. Calibrate the ECM if necessary. Refer to the appropriate electronic service tool manual and Procedure 019-032. |
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Fuel rate low, fuel pressure okay, intake manifold pressure high, ambient air temperature between 0° and 38°C [32° and 100°F] |
Check for correct control parts list (CPL) components. Refer to Control Parts List, Bulletin 3379133. |
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Fuel rate low, fuel pressure okay, intake manifold pressure low |
Check the fuel pump output pressure, pulsation damper, and pressure regulator. Replace the fuel pump if necessary. Refer to Procedure 005-016 and 005-031 in the Troubleshooting and Repair Manual, ISM, ISMe, and QSM11 Series Engines, Bulletin 3666322. |
