Engine diagnostics (Taurus 1 and 2)

1. The engine does not turn over when trying to start it

1. The battery terminals are corroded or not connected. Check the battery cables. Ensure good contact, clean them if necessary.

2. The battery is discharged or faulty. If the wire terminals are clean and tightly connected to the battery terminals, turn on the ignition and check the operation of the headlights or windshield wipers. If they do not work, then the battery is discharged.

3. The automatic transmission lever is not in the Park or Neutral position.

4. Breakage or open circuit in the starter circuit. Check all wires and contacts of the battery, ignition circuit and starter relay.

5. The starter bendix pinion has hit the flywheel ring gear. If the gearbox is manual, engage the gear and roll the car so that the engine turns. Remove the starter, inspect the pinion and flywheel (chapter 5).

6. Starter relay is faulty (chapter 5).



7. The starter motor is faulty (chapter 5).

8. The ignition switch is faulty (chapter 12).

2. The engine turns over but does not start

1. There is no gas in the tank.

2. The fuel injection system is faulty (chapters 4 and 5).

3. The battery is discharged (the motor rotates slowly).

4. Check the wiring as recommended in the previous section. The battery terminals are oxidized (see previous section).

5. Malfunction of injection or fuel pump (chapter 4).

6. The ignition system is damp or damaged (chapter 5).

7. Worn, faulty or improperly installed spark plugs (chapter 1).

8. Breakage, loose connection of contacts or break in the starter circuit (see previous section).

9. The distributor has failed, changing the ignition timing. Turn the distributor to start the engine, then immediately set the correct ignition timing (chapter 5).

10. Breakdown, loose connection of contacts or break in the ignition coil circuit, malfunction of the coil itself (chapter 5).

3. The engine does not start when the starter is running

1. The starter gear is jammed. Remove the starter (chapter 5) and take a look.

2. The starter gear or flywheel teeth are worn or broken. Open the cover in the oil pan that gives access to the flywheel/drive plate and inspect.

4. It is difficult to start a cold engine

1. The battery is discharged or the charge is low. Check as stated in section 1.

2. Malfunction in the fuel injection system (chapters 4 and 5).

3. The fuel injection system requires overhaul (chapter 4).

4. The distributor rotor is dirty and/or broken (chapters 1 and 5).

5. It is difficult to start a hot engine

1. The air filter is clogged (chapter 1).

2. The fuel injection system is faulty (chapters 4 and 5).

3. Fuel does not enter the injection system (see section 2).

6. The starter makes noise when turned on

1. The gear or flywheel teeth are worn or broken. Open the cover at the rear of the engine (if located) and inspect.

2. The bolts securing the starter are loose.

7. The engine starts and then immediately stalls

1. Loose electrical contacts or a breakdown in the distributor, ignition coil or generator.

2. Fuel injection system failure (chapters 4 and 5).

3. Not enough fuel is getting into the injector. Check the fuel pressure (chapter 5).

4. Vacuum loss in the intake manifold due to leaks through seals, fuel injection unit or throttle. Make sure all mounting bolts and nuts are tight and vacuum hoses to the fuel injection unit are properly installed and in good working order.

8. The engine runs unevenly at idle, the idle speed is unstable

1. Vacuum loss. Check the fuel injection unit and intake manifold fasteners for tightness. Make sure all lines are connected and intact. With the engine running, you can listen for a vacuum loss with a stethoscope. You will hear a whistling sound. Check the injector and intake manifold for tightness of the sealing gaskets.

2. Malfunction in the injection system (chapter 4 and 5).

3. EGR valve leaks or PCV valve blockage (see chapters 1 and 6).

4. The air filter is clogged (chapter 1).

5. The fuel pump does not provide the required injection performance chapter 4).



6. The fuel injection system is depressurized (chapter 4).

7. Leaks through the cylinder head gasket.

8. Timing chain or sprocket is worn (chapter 2).

9. The working projections of the camshaft cams are worn out (chapter 2).

9. Engine idling irregularities

1. Spark plugs are worn or incorrectly installed (Chapter 1).

2. Malfunction in the fuel injection system (chapters 4 and 5).

3. Bad spark plug wires (chapter 1).

10. Intermittent operation of the engine

1. Clogged fuel filter and/or contamination in the fuel system (chapter 1).

2. Incorrectly installed or faulty spark plugs (chapter 1).

3. The fuel injection system is faulty (chapters 4 and 5).

4. The ignition timing angle is set incorrectly (chapter 5).

5. Cracked distributor cap, disconnected wires or damaged distributor (chapter 5).

6. Leaks through spark plug wires (chapter 1).

7. The exhaust system is faulty (chapter 6).

8. The compression pressure in the cylinders is low or absent. Remove the spark plugs and check the pressure using a gauge (chapter 2).

9. Weak or faulty ignition system (chapter 5).

10. Vacuum losses in the fuel injection system, intake manifold or supply lines (see section 8).

11. The engine stalls

1. Abnormal idle speed. Check VECI label and chapter 4.

2. The fuel filter is clogged and/or there is water and dirt in the fuel supply system (chapter 1).

3. The distributor elements are damp or damaged (chapter 5).

4. The injection system or sensors are faulty (chapter 4 and 5).

5. Faulty exhaust system components (chapter 6).

6. Defective or incorrectly installed spark plugs (chapter 1). Check the high-voltage wires (chapter 1).



7. Vacuum loss at the injector unit, intake manifold or vacuum hoses (see section 8).

12. The engine loses power

1. The ignition timing angle is set incorrectly.

2. The fuel injection system is faulty (chapters 4 and 5).

3. The distributor shaft play is too great. Also check if the rotor, distributor cap, wires, etc. are broken (chapters 1 and 5).

4. Spark plugs are faulty or incorrectly installed (chapter 1).

5. The fuel injection system is incorrectly adjusted or worn out (chapter 4).

6. The ignition coil is faulty (chapter 5).

7. Brake stuck (chapter 1).

8. The fluid level in the automatic transmission is not normal (chapter 1).

9. The clutch is slipping (chapter 8).

10. The fuel filter is clogged and/or there is dirt in the fuel system (chapter 1).

11. The exhaust control system does not work (chapter 6).

12. Use non-standard fuel, fill the tank with the required brand of fuel.

13. Low or no compression pressure in the cylinders. Check with a compression gauge, which can detect leaking valves and/or a blown head gasket (chapter 2).

13. The engine gives a reverse start

1. The exhaust system is faulty (chapter 6).

2. Malfunctions in the ignition system (chapters 4 and 5).

3. The ignition timing angle is set incorrectly (chapter 5).

4. The secondary ignition circuit is faulty (broken spark plug insulator, problems with spark plug wires, distributor cap and/or rotor (chapters 1 and 5)).

5. The injection unit needs adjustment or is badly worn (chapter 4).

6. Vacuum loss in the injection unit, intake manifold or vacuum hoses (see section 8).



7. Valves sticking (chapter 2).

14. Detonation or knocking in the engine when increasing speed or when climbing

1. Wrong brand of fuel. Fill the tank with gasoline with the correct octane number.

2. The fuel injection system is faulty (chapter 4 and 5).

3. The ignition timing angle is set incorrectly (chapter 5)

4. The fuel injection unit needs adjustment (chapter 4).

5. Spark plugs of another brand. Check the type of spark plugs by the tag installed in the engine compartment. Check that the integrity of the spark plugs and wires is intact (chapter 1).

6. The ignition distributor elements are worn or damaged (chapter 5).

7. Malfunctions in the exhaust system (chapter 6).

8. Vacuum drop (see section 9).

15. The engine continues to run when the ignition is off

1. High idle speed.

2. Malfunction of the fuel injection system (chapters 4 and 5).

3. The ignition timing angle is not adjusted correctly (chapter 5).

4. Engine operating temperature is too high. Possible causes - faulty thermostat, clogged radiator, inoperative water pump (chapter 3).

[Information for this article was taken from the website: FordBook.ru]