Detroit DD15 GHG14 (2014-16) Fault Code: SPN 1322 FMI 31 (MCM) Multiple Cylinder Misfire Detected at Idle
The Entry Conditions For This Code Are:
1. Engine speed is above low idle.
2. All cylinders are active, no fault reactions.
3. Engine speed/torque is steady.
This Fault Can Occur Due To The Conditions Listed Below:
1. Cylinder kit failure.
2. Valve train failure.
3. Lash adjustments.
4. Fuel injector.
5. High pressure fuel line (Rail to fuel injector).
6. Debris entering fuel injector (intermittent faults).
7. Fuel quality.
PROBABLE CAUSES:
1. Cylinder kit failure.
2. Valve train failure.
3. Lash adjustments.
4. Fuel injector.
5. High pressure fuel line (rail to fuel injector).
6. Debris entering fuel injector.
7. Fuel quality.
Note: If 1322-31 active, fix that first.
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