Engine does not rotate when trying to start
- Loose or corroded battery contacts (Chapter 5).
- The battery is empty or defective (Chapter 5).
- Open, disconnected or loose contacts in the starter circuit (Chapter 5).
- Faulty starter solenoid or switch (Chapter 5).
- Faulty starter (Chapter 5).
- Electric starter gear or flywheel teeth loose or broken (Chapter 5).
- Open or disconnected motor ground jumper (Chapter 5).
- Automatic transmission in gears other than "Park" or "Neutral" or selector failure (Chapter 7B).
Engine turns over but does not start
- Empty fuel tank.
- Battery low (motor rotates slowly) (Chapter 5).
- Loose or corroded battery contacts (Chapter 5).
- Ignition system components defective or damp - (Chapters 1, 5).
- Open, disconnected or loose contacts in the ignition circuit (Chapters 1, 5).
- Worn, defective or incorrect spark plug gap setting (Chapter 1).
- Serious mechanical failure (e.g. camshaft drive) (Chapter 2A).
Engine won't start when cold
- Low battery (Chapter 5).
- Loose or corroded battery contacts (Chapter 5).
- Worn, defective or incorrect spark plug gap setting (Chapter 1).
- Ignition system malfunction (Chapters 1, 5).
- Malfunction of the engine management system (Chapters 1, 4, 5, 6).
- Low compression in the cylinders (Chapter 2A).
Engine won't start when hot
- Dirty or clogged air filter element (Chapter 1).
- Malfunction of the engine management system (Chapters 1, 4, 5, 6).
- Low compression in the cylinders (Chapter 2A).
- Malfunction of hydraulic valve clearance compensators (Chapter 2A).
Excessive noise when the starter is running or jerking when it engages
- Starter gear or flywheel teeth loose or broken (Chapter 5).
- Loose starter mounting bolts (Chapter 5). Internal starter components worn or damaged (Chapter 5).
Engine starts and dies immediately
- Open or loose contacts in the ignition circuit (Chapters 1, 5).
- Malfunction of the engine management system (Chapters 1, 4, 5, 6).
- Intake manifold vacuum leak (Chapter 1, 4, 6).
Engine idling erratically
- Idle speed control valve malfunction (Chapter 4).
- Malfunction of the engine management system (Chapters 1, 4, 5, 6).
- Dirty or clogged air filter element (Chapter 1).
- Vacuum leak in the intake manifold or hoses connected to it (Chapter 1, 4, 6).
- Worn, defective or incorrect spark plug gap setting (Chapter 1).
- Malfunction of hydraulic valve clearance compensators (Chapter 2A).
- Unequal or low compression in the engine cylinders (Chapter 2).
- Camshaft lobes wear (Chapter 2).
- Incorrect setting of the toothed belt tension of the timing mechanism (Chapter 2A).
Ignition failures when the engine is idling
- Worn, defective or incorrect spark plug gap setting (Chapter 1).
- Malfunction of high-voltage wires of spark plugs (Chapter 1).
- Idle speed control valve malfunction (Chapter 4).
- Incorrect ignition timing (Chapters 5, 6).
- Malfunction of the engine management system (Chapters 1, 4, 5, 6).
- Vacuum leak in the intake manifold or hoses connected to it (Chapter 1, 4, 6).
- Malfunction of hydraulic valve clearance compensators (Chapter 2A).
- Unequal or low compression in the engine cylinders (Chapter 2).
- Disconnection, leakage, or destruction of rubber crankcase breather hoses (Chapters 1, 6).
Engine ignition failures in the operating speed range
- Fuel filter clogged (Chapter 1).
- Malfunction or reduced pressure of delivery of the fuel pump (Chapter 4).
- Clogged fuel tank vent or kinked fuel line (Chapter 4).
- Vacuum leak in the intake manifold or hoses connected to it (Chapter 1, 4, 6).
- Worn, defective or incorrect spark plug gap setting (Chapter 1).
- Malfunction of high-voltage wires of spark plugs (Chapter 1).
- Ignition coil failure (Chapter 5),
- Malfunction of the engine management system (Chapters 1, 4, 5, 6).
- Unequal or low compression in the engine cylinders (Chapter 2A).
The engine runs erratically during acceleration
- Worn, defective or incorrect spark plug gap setting (Chapter 1).
- Malfunction of the engine management system (Chapters 1, 4, 5, 6).
- Vacuum leak in the intake manifold or hoses connected to it (Chapter 1, 4, 6).
Engine stalls
- Idle speed control valve malfunction (Chapter 4).
- Malfunction of the engine management system (Chapters 1, 4, 5, 6),
- Vacuum leak in the intake manifold or hoses connected to it (Chapter 1, 4, 6).
- Fuel filter clogged (Chapter 1).
- Malfunction or reduced pressure of delivery of the fuel pump (Chapter 4).
- Clogged fuel tank vent or kinked fuel line (Chapter 4).
Insufficient engine power
- Incorrect ignition timing (Chapters 5, 6).
- Malfunction of the engine management system (Chapters 1, 4, 5, 6).
- Incorrect installation or incorrect tension of the timing belt (Chapter 2A).
- Fuel filter clogged (Chapter 1).
- Malfunction or reduced pressure of delivery of the fuel pump (Chapter 4).
- Unequal or low compression in the engine cylinders (Chapter 2A).
- Worn, defective or incorrect spark plug gap setting (Chapter 1).
- Vacuum leak in the intake manifold or hoses connected to it (Chapter 1, 4, 6).
- Jamming brakes (Chapters 1 and 9).
- Clutch slip (Chapter 8).
- Incorrect fluid level in automatic transmission (Chapter 1).
Motor continues to rotate after shutdown
- Excessively high idle speed (Chapters 4, 6).
- Malfunction of the engine management system (Chapters 1, 4, 5, 6).
- Excessive contamination of internal engine parts by fuel residues (Chapter 2A).
- Engine operation at elevated temperatures (Chapter 3).
Backfires in the engine
- Incorrect ignition timing (Chapters 5, 6).
- Malfunction of the engine management system (Chapters 1, 4, 5, 6).
- Incorrect installation or incorrect tension of the timing belt (Chapter 2A).
- Vacuum leak in the intake manifold or hoses connected to it (Chapter 1, 4, 6).
When the engine is running, the low oil pressure indicator is on
- Low oil level or use of non-regulated type oil (Chapter 1).
- Faulty oil pressure sensor (Chapter 2A).
- Worn engine bearings and/or oil pump (Chapter 2).
- Engine operation at elevated temperatures (Chapter 3).
- Defective oil pressure relief valve (Chapter 2A),
- Intake pipe strainer clogged (Chapter 2A).
Noises in the engine
Preignition (detonation) or knocking sound when accelerating or under load
- Incorrect ignition timing (Chapters 5, 6).
- Fuel of the wrong brand (Chapter 4).
- Vacuum leak in the intake manifold or hoses connected to it (Chapter 1, 4, 6).
- Excessive contamination of internal engine parts by fuel residues (Chapter 2A).
Whistling or wheezing noises
- Leakage through intake manifold gasket (Chapter 2A).
- Leakage at the exhaust manifold gasket or exhaust manifold joint (Chapter 1, 2A, 4).
- Vacuum hose leak (Chapters 1, 4, 6, 9).
- Breakdown of the cylinder head gasket (Chapter 2A).
Knocking or rattling noises
- Malfunction of hydraulic valve clearance compensators (Chapter 2A).
- Valve actuator or camshaft wear (Chapter 2A).
- Worn toothed belt or tensioner (Chapter 2A).
- Malfunction in auxiliary units (cooling system pump, generator, etc.) (Chapters 3, 5 etc.).
Bumps or thuds
- Wear of connecting rod bearings (regular heavy knocking, with possible weakening under load) (Chapter 2B).
- Wear of main bearings (rattling and knocking, with possible weakening under load) (Chapter 2B).
- Piston shift (heard on a cold engine) (Chapter 2B).
- Malfunction in auxiliary units (cooling system pump, generator, etc.) (Chapters Chapters 3, 5 etc.).
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