Engine hesitation of common rail diesel engine is classified engine hesitation at cold start, continuous engine hesitation, intermittent engine hesitation. Inspect symptoms exactly to find the cause of engine hesitation.
Items | Inspection | Items | Inspection |
● Engine oil | a. Maintenance interval b. Oil level c. Color and viscosity | ● Air cleaner element | a. Maintenance interval b. Contamination |
● Auto Transaxle fluid | a. Maintenance interval b. Oil level c. Color and viscosity | ● Fuel leak | a. Low pressure fuel hose connection b. Low pressure fuel line leak c. High pressure pipe connection |
● Coolant | a. Maintenance interval b. Coolant level c. Color and viscosity | ● Intake, exhaust system leak | a. Intake hose connection b. Clamp connection c. Worn Intake hose |
● DTC | Refer to DTC guide | ||
Symptom | Inspection procedure |
● Engine hesitation or poor acceleration appears for a while at cold starting. (Engine hesitation disappear after warming up.) | ● Go to "Engine hesitation at cold starting inspection" |
● Engine hesitation occurs after warming up. (Regular engine hesitation occurs.) | ● Go to "Idle speed comparison test" |
● Engine stalls after engine hesitation. | ● If engine hesitation occurs while driving, There would be a poor connection in sensor and actuator circuits such as CKPS, CMPS, injector etc. ☞ Repair refer to "DTC analysis" after checking DTC. |
