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6. FUEL INJECTOR CLASSIFICATION NOTE: Each Fuel Injector is labeled with a code. This code determines the injector classification. Each Refer to the Service Information to locate each fuel injector label and check for the correct classification for each Are all of the injectors classified correctly? Yes >> Go To 7 No >> Using the scan tool, program the correct Fuel Injector classifications into the ECM. Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) 7. ENGINE COMPRESSION Start and idle the engine. With the scan tool, perform the Cylinder Compression Test. Does the Cylinder Compression Test indicate low compression in any of the cylinders? Yes >> Using the Service Information, repair the engine as necessary to regain proper cylinder compression. Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) No >> Go To 8 8. FUEL INJECTOR NOTE: An injector that sticks open can cause this symptom. A sticking injector will cause the engine to With the scan tool, perform the Cylinder Fuel Quantity Correction Test. NOTE: A problem injector will be indicated by a significant change in correction quantity as compared to Are any of the injectors displaying a significant amount of injection quantity correction? Yes >> Using the Service Information, remove and inspect the Fuel Injectors for signs of damage or debris that may cause the injector to stick. Sticking injectors may cause the combustion chamber to become black Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) No >> Go To 9 9. ENGINE DRIVE BELT/CHAIN Refer to the Service Information to ensure the Engine Drive Belt/Chain is installed correctly and the camshaft and Were any problems found? Yes >> Repair as necessary. Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) No >> Test Complete. 9 - 1868 ENGINE ELECTRICAL DIAGNOSTICS - DIESEL LX |