This article supersedes TSB 06-22-3 to update the Service Procedure.
Some vehicles equipped with a 6.0L diesel engine may experience white smoke, lack of power, exhaust odor, surges, running rough, or no start when cold. These conditions are caused by the injector spool valve sticking internally during cold engine operation (engine oil temperature (EOT) less than 70 °F ( 21 °C)) . The concern is typically evident following a cold start after an overnight soak at ambient temperatures below 70 °F (21 °C). and may last 3-5 minutes or longer as the vehicle warms up. The concern completely disappears after driving and the EOT is greater than 150 °F (66 °C). This concern typically occurs on vehicles with greater than 15,000 miles (24,140 Km/h).
Diagnose and address any warm driveability issues or hard fault diagnostic trouble codes (DTCs) prior to performing this TSB. Then if cold driveability symptoms still exist use the following Service Procedure.
This procedure includes a FICM calibration that adds inductive heating of the injector coils to locally heat the oil in the injector to normal operating temperatures very rapidly and keep it hot until normal overall engine oil temperature is achieved. This will prevent cold spool valve sticking on all injectors. Therefore, it will not be necessary to replace fuel injectors for the cold driveability symptoms listed in this TSB.
Inductive heat is active in Key On Engine Run (KOER) mode below 2500 RPM. It is tapered out from 131-167 °F (55-75 °C) EOT, and is fully deactivated above 185 °F (85 °C) EOT.
This updated calibration strategy is a greater improvement than the previous post-cycle Fuel Injector Control Module (FICM) software release that cycled the injectors after shutdown (TSB 06-22-3). This strategy will eliminate the need to post-cycle the injector spool valves, and as a result will also eliminate the need to perform the E-Series wiring modification. The strategy achieves rapid heating of the oil in the injector through inductive heating of the injector coils. The Customer Information Sheet that was included with TSB 06-22-3 is no longer necessary.
Customers who receive this new calibration after previously having received the post-cycle calibration (described in 06-22-3) will notice the buzzing noise at shutdown has been eliminated. This is normal, as the post-cycle is no longer needed with inductive heating. Additionally, for E-Series there is no need to remove wiring modifications that were previously performed per TSB 06-22-3. Unmodified E-Series vehicles will NOT need the wiring modification with this calibration.
Eligible Under Provisions Of New Vehicle Limited Warranty Coverage And Emissions Warranty CoverageIMPORTANT: Warranty coverage limits/policies are not altered by a TSB. Warranty coverage limits are determined by the identified causal part.