|
|
DIAGNOSIS AND TESTING—ENGINE DIAGNOSIS - PERFORMANCE PERFORMANCE DIAGNOSIS CHART—GASOLINE ENGINES CONDITION POSSIBLE CAUSES CORRECTION ENGINE WILL NOT 1. Weak or dead battery 1. Charge/Replace Battery. (Refer to 8 - 2. Corroded or loose battery 2. Clean/tighten suspect battery/starter 3. Faulty starter or related circuit(s) 3. Check starting system. (Refer to 8 - 4. Seized accessory drive component 4. Remove accessory drive belt and 5. Engine internal mechanical failure or 5. Refer to (Refer to 9 - ENGINE - ENGINE CRANKS BUT 1. No spark 1. Check for spark. (Refer to 8 - 2. No fuel 2. Perform fuel pressure test, and if 3. Low or no engine compression 3. Perform cylinder compression ENGINE LOSS OF 1. Worn or burned distributor rotor 1. Install new distributor rotor 2. Worn distributor shaft 2. Remove and repair distributor (Refer 3. Worn or incorrect gapped spark plugs 3. Clean plugs and set gap. (Refer to 8 - 4. Dirt or water in fuel system 4. Clean system and replace fuel filter 5. Faulty fuel pump 5. Install new fuel pump 6. Incorrect valve timing 6. Correct valve timing 7. Blown cylinder head gasket 7. Install new cylinder head gasket 8. Low compression 8. Test cylinder compression (Refer to 9 9. Burned, warped, or pitted valves 9. Install/Reface valves as necessary 9 - 4 ENGINE 2.5L AN ENGINE 2.5L (Continued) |