Electronic Control System ISM and QSM11 Engines – Engine Decelerates Slowly

Symptom Tree  t041

This is symptom tree t041
Cause Correction

Electronic fault codes active or high counts of inactive fault codes

Read the fault codes with an electronic service tool. Refer to Section TF for fault code troubleshooting.

 

Accelerator pedal or lever is restricted or malfunctioning

Check the percent throttle reading on an electronic service tool. Verify that it reads 100 percent with the accelerator pedal depressed and 0 percent when released. Calibrate the accelerator if possible. Replace the accelerator if necessary Section TF for fault code troubleshooting.

 

Air in the fuel system

Check for air in the fuel system. Refer to Procedure 006-003 in the Troubleshooting and Repair Manual, ISM/QSM11 Series Engines, Bulletin 3666322.

 

Injectors are malfunctioning

Perform the automated cylinder performance test. Use the data to determine if the engine is overfueled. Replace the injectors as necessary. Refer to Procedure 006-026 in the Troubleshooting and Repair Manual, ISM/QSM11 Series Engines, Bulletin 3666322.

 

Turbocharger oil seal is leaking

Check the turbocharger compressor and turbine seals. Refer to Procedure 010-033 in the Troubleshooting and Repair Manual, ISM/QSM11 Series Engines, Bulletin 3666322.

 
Last Modified:  05-Jan-2004