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DIAGNOSIS AND TESTING DIAGNOSIS AND TESTING - ENGINE Engine diagnosis is helpful in determining the causes of malfunctions not detected and remedied by These malfunctions may be classified as either per- formance (e.g., engine idles rough and stalls) or (Refer to 9 - ENGINE - DIAGNOSIS AND TEST- ING) (PERFORMANCE) or (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) (MECHANICAL) for Additional tests and diagnostic procedures may be necessary for specific engine malfunctions that can • (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) (PERFORMANCE) • (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) (MECHANICAL) DIAGNOSIS AND TESTING - ENGINE DIAGNOSIS - PERFORMANCE ENGINE PERFORMANCE DIAGNOSIS CHART CONDITION POSSIBLE CAUSES CORRECTION ENGINE WILL NOT CRANK 1. Weak or dead battery 1. Charge/Replace Battery. (Refer to 2. Corroded or loose battery 2. Clean/tighten suspect battery/ 3. Faulty starter or related circuit(s) 3. Check starting system. (Refer to 4. Siezed accessory drive 4. Remove accessory drive belt and 5. Engine internal mechanical 5. (Refer to 9 - ENGINE - TJ ENGINE 4.0L 9 - 71 ENGINE 4.0L (Continued) |