1. When trying to start, the engine does not rotate
1. Poor contact or corrosion of battery terminal connections (Chapter 1).
2. The battery is low or defective (Chapter 1).
3. Automatic transmission not included "parking" (chapter 7B) or the clutch is not depressed (chapter 8).
4. In the starter circuit, an open or poor wire contact (chapter 5 and 12).
5. Seizure in engagement of the starter gear with the flywheel ring gear (chapter 5).
6. Faulty starter solenoid (chapter 5).
7. Faulty starter motor (chapter 5).
8. Faulty ignition switch (chapter 12).
9. Worn or broken starter gear or ring gear teeth (chapter 5).
2. Engine turns over but does not start
1. 8 tank no fuel.
2. Low battery (engine cranks slowly) (chapter 5).
3. Poor contact or corrosion in battery terminal connections (Chapter 1)
4. Leaking fuel injectors, faulty fuel pump, fuel pressure regulator, etc. (chapter 4).
5. Fuel does not reach the fuel rail (chapter 4).
6. Damp or defective components of the ignition system (chapter 5).
7. Faulty or poorly adjusted spark plugs (Chapter 1).
8. In the starter circuit, an open or poor wire contact (chapter 5 and 12).
9. The ignition distributor is weak and changes the lead (chapter 5).
10. Open or poor contact in the ignition coil circuits, or the coil is faulty (chapter 5).
11.. Broken or split toothed belt (chapter 2).
13. Faulty fuel pump relay or relay circuits (chapter 4).
3. Cold engine does not start well
1. Low battery (Chapter 1).
2. Fuel system malfunction (chapter 4).
3. Leaking nozzles (chapter 4).
4. Faulty ignition distributor rotor (chapter 5).
4. Hot engine does not start well
1. Clogged air filter (Chapter 1).
2. Fuel does not enter the injection system (chapter 4).
3. Corrosion of the battery terminals, especially the negative terminal (Chapter 1).
4. Faulty fuel vapor removal system (chapter 6).
5. Noise and crackling when the starter is turned on
1. Starter gear or flywheel ring gear teeth worn or broken (chapter 5).
2. Loose or missing starter mounting bolts (chapter 5).
6. The engine starts and immediately stalls
1. Poor contact 8 connectors of the ignition distributor, in the coil or generator (chapter 5).
2. Not enough fuel is supplied to the injectors (chapters 1 and 4).
3. Vacuum leak from gasket between intake manifold and throttle body (chapters 1 and 4).
7 Oil puddle under the engine
1. Pan gasket or drain plug seal is leaking (chapter 2).
2. Leaking oil pressure sensor (chapter 2).
3. Leakage from under the valve covers (chapter 2).
4. Engine seals are leaking (chapter 2).
8 Erratic idle
1. Vacuum leak (chapters 2 and 4).
2. Faulty gas recirculation valve (chapter 6).
3. Clogged air filter (Chapter 1).
4. The fuel pump does not supply enough fuel to the injectors (chapter 4).
5. Skips the gasket under the cylinder head (chapter 2).
6. Faulty toothed belt or its pulleys (chapter 2).
7. Worn camshaft lobes (chapter 2).
9. Ignition failures at idle
1. Faulty or misadjusted spark plugs (Chapter 1).
2. Faulty high voltage wires (Chapter 1).
3. Vacuum leaks (eyes 1).
4. Incorrectly adjusted ignition timing (Chapter 1).
5. Low or uneven compression across the cylinders (chapter 2).
10. Ignition failures during acceleration
1. Clogged air filter or fuel system (Chapter 1).
2. Low pressure in the fuel system (chapter 4).
3. Defective or incorrectly adjusted spark plugs (Chapter 1).
4. Wrong ignition timing (chapter 5).
5. A crack in the cover of the ignition distributor, or the components of the distributor are faulty, or the wires are disconnected from the distributor (chapters 1 and 5).
6. Faulty high voltage wires (chapters 1 and 5).
7. Defective exhaust system components (chapter 4).
8. Low or uneven compression across the cylinders (eyes 2).
9. Malfunction in the ignition system (chapter 5).
10. Vacuum leak in the fuel injection system (chapter 4), in the intake manifold (chapter 2A or 2B), in the injection control valve (chapter 6) or vacuum hoses.
11. Engine stumbles during acceleration
1. Dirty candles (Chapter 1).
2. Malfunction in the fuel injection system (chapter 4).
3. Clogged air filter (chapters 1 and 4).
4. Incorrect ignition timing (chapter 5).
5. Air leakage in the intake duct (chapters 2 and 4).
12. Engine speed fluctuates with constant throttle position
1. Air leak in intake duct (chapters 2 and 4).
2. Faulty fuel pump (chapter 4).
3. Poor contact in the injector harness connectors (chapter 4).
4. Faulty BEU or sensors (chapter 6).
13. Engine stalls
1. Wrong idle speed set (Chapter 1).
2. Clogged fuel filter or fuel system (chapters 1 and 4).
3. Damp or defective ignition distributor (chapter 5).
4. Faulty exhaust system components (chapter 4).
5. Defective or incorrectly adjusted spark plugs (Chapter 1).
6. Faulty high voltage wires (Chapter 1).
7. Vacuum leak in intake manifold or vacuum hoses (chapters 2 and 4).
8. Valve clearances incorrectly set (chapter 1).
14. The engine does not develop power
1. Ignition timing incorrectly set (chapter 5).
2. Runout of the ignition distributor shaft (chapter 5).
3. Worn rotor, faulty distributor cap or wires (chapters 1 and 5).
4. Faulty or incorrectly adjusted spark plugs (Chapter 1).
5. Malfunctions in the fuel injection system (chapter 4).
6. Faulty ignition coil (chapter 5).
7. Wheels not disengaged (chapter 9).
8. Incorrect fluid level in automatic transmission (Chapter 1).
9. Clutch slip (chapter 8).
10. Clogged fuel filter or fuel system (chapters 1 and 4).
11. Emission control systems not working properly (chapter 6).
12. Low or uneven compression across the cylinders (chapter 2).
13. Exhaust system clogged with dirt (chapter 4).
15. Backflashes
1. Emissions management system does not work satisfactorily (chapter 6).
2. The ignition timing is set incorrectly.
3. Faulty secondary ignition circuit (crack in the spark plug insulator, faulty high voltage wires, cover or distributor rotor) (chapters 1 and 5).
4. Faulty fuel injection system (chapter 4).
5. Vacuum leak in intake manifold, control valve or vacuum hoses (chapters 2 and 4).
6. Incorrect adjustment or sticking of valves (Chapter 1).
16. Detonation during engine acceleration and load increase
1. Wrong grade of fuel.
2. Incorrect ignition timing (chapter 5).
3. Faulty fuel injection system (chapter 4).
4. Candles are defective or of the wrong type (Chapter 1).
5. Worn or defective ignition distributor components (chapter 5).
6. The gas recirculation valve does not work (chapter 6).
7. Vacuum leak (chapters 2 and 4).
8. Faulty knock sensor (chapter 6).
17. Oil pressure warning light on
1. Low oil level (Chapter 1).
2. Short circuit in the electrical circuit (chapter 12).
3. Faulty oil pressure sensor (chapter 2).
4. Worn engine bearing shells or oil pump (chapter 2).
18. The engine continues to run after the ignition is turned off
1. Leaking nozzles
2. Engine overheating (see point 24).
3. Carbon deposits on the bottoms of the pistons (chapter 2).