Ignition coils are often called compact Electric. These serve to convert the 12 V AC The produced battery, a higher voltage is required to ignite the combustible mixture in the cylinders and the engine starts.
Each spark plug has its own coil. The latter is connected with a candle or using a wire or located on the spark plug. To generate a spark in the spark plug electrodes with a voltage of 15 000-20 000 V. When a fault may occur coils misfiring, which will lead to an increase in fuel consumption.
Signs of failure of the ignition coil
Irregularities in engine operation may indicate a failure of the ignition coil. The more serious the problem, the more clearly will manifest its symptoms. Below are the most common signs of malfunction ignition coils.
1. exhaust blowback
Reverse exhaust occur in the early stages of the output of the system of coils. This phenomenon is caused by ingestion of unburned fuel in the exhaust system. If the problem is not corrected in time, it can lead to costly repairs. On the reverse exhaust may indicate occurrence of black smoke with a strong smell of gasoline exhaust.
2. Increased fuel consumption
Another symptom fault ignition coil is the deterioration of fuel efficiency. If the fuel consumption of your vehicle suddenly increased, it may be a sign of problems with the ignition coils.
3. misfiring
Defective ignition coil disturb the order of ignition of fuel in the cylinders. Attempting to start the engine in this case could lead to a misfire which are shown as "cough" crash followed. The movement driver usually faces uneven and jerky operation of the engine. Idling vibration will be felt.
4. Engine sudden stop
Incorrect operation of the ignition coil can lead to a stop of the engine due to the unstable sparks. The engine may stall completely, forcing the driver each time his run.
5. Jerks, a tough job at idle power reduction
Another symptom of failure are jerks, hard work of the engine idling and vibration. Engine output can also be reduced.
6. Tanning lamp control Check Engine
The electronic control unit usually stored code P0351 (ignition coil - the fault in the primary / secondary circuit). At failure of the ignition coil on the dashboard warning light Check Engine. This points to the need to use a special scanner to diagnose.
7. Difficult engine start
This symptom occurs most often if your car is equipped with a coil. When it malfunctions crankshaft rotates, but the engine will not start due to lack of spark in the cylinders.
How to check the ignition coil?
- To check the first shut off the engine and open the hood.
- Locate and remove the spark plug high-voltage wire from one of them. Usually these wires connect the distributor and the spark. When working with electrical system components, use rubber gloves and insulated tools.
- Disconnect the spark plug connector and remove the spark plug. Now connect the connector again.
- Hold candle isolated using pliers, bring it to the electrode metal piece.
- Remove the fuel pump connector and the scroll engine starter. To carry out this procedure, you may need an assistant. During the rotation of the engine, you should see blue sparks in the gap between the spark plug electrodes. This indicates the proper operation of the ignition coil. No spark or staining orange are signs coil failure.
After completing the test, disconnect the wire from a candle, set it in place and attach the connector of high-voltage wires.
A simple test to determine a faulty ignition coil:
- Start the engine.
- The engine should be idling.
- Remove the screw fastening of the coil of the first cylinder and remove the coil.
Changes in engine operation (irregular work) coil is a sign of serviceability. Next, go to the next cylinder. If any of the coil is faulty, then when removing any changes in the operation of the engine will occur.