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CONDITION POSSIBLE CAUSES CORRECTION ENGINE RPM WILL NOT 6. Improperly operating injection 6. Repair or replace injection pump. LOW POWER 1. Fuel control lever not moving to 1. Check/correct for stop-to-stop travel. 2. High oil level. 2. Check/correct oil level. 3. Engine overloaded. 3. Check for added loading from accessories 4. Slow throttle response caused by 4. Check for leaks and obstructions. Tighten 5. Inadequate intake air flow. 5. Inspect/replace air cleaner element. Look 6. Inadequate fuel supply. Air in the 6. Check the flow through the filter to locate 7. Excessive exhaust restriction. 7. Check/correct the restriction in the exhaust 8. High fuel temperature. 8. Verify that fuel heater is off when engine is 9. Poor quality fuel or fuel 9. Verify by operating from a temporary tank 10. Air leak between the 10. Check/correct leaks in hoses, gaskets, 11. Exhaust leak at the manifold or 11. Check/correct leaks in the manifold or 12. Improperly operating 12. Inspect/replace turbocharger. 13. Wastegate operation. 13. Check wastegate operation. 14. Valve not operating. 14. Check for bent push rod, replace if 15. Worn or improperly operating 15. Check/replace injectors. 16. Incorrect injection pump timing. 16. Verify injection pump timing (see Group 17. Improperly operating injection 17. Repair or replace injection pump. 9 - 6 ENGINE WJ DIAGNOSIS AND TESTING (Continued) 2000 JEEP GRAND CHEROKEE |