Hyundai Sonata: Repair procedures - Ignition System - Engine Electrical SystemHyundai Sonata: Repair procedures

On-vehicle Inspection

Spark Test
1.
Disconnect the ignition coil connectors (A).
2.
Remove the ignition coils (A).
3.
Using a spark plug socket, remove the spark plug.
4.
Install the spark plug to the ignition coil.
5.
Ground the spark plug to the engine.
6.
Check if spark occurs while engine is being cranked.
To prevent fuel being injected from injectors while the engine is being cranked, disconnect the injector connector.
Crank the engine for no more than 5 ~ 10 seconds.
7.
Inspect all the spark plugs.
8.
Using a spark plug socket, install the spark plug.
9.
Install the ignition coil.
10.
Reconnect the ignition coil connector.

Inspect Spark Plug
1.
Disconnect the ignition coil connectors (A).
2.
Remove the ignition coils (A).
3.
Using a spark plug socket, remove the spark plug.
Be careful that no contaminates enter through the spark plug holes.
4.
Inspect the electrodes (A) and ceramic insulator (B).

Inspection Of Electrodes
Condition
 Dark deposits
 White deposits
Description
-
Fuel mixture too rich
-
Low air intake
-
Fuel mixture too lean
-
Advanced ignition timing
-
Insufficient plug tightening torque

5.
Check the electrode gap (A).
Standard
Unleaded : 1.0 ~ 1.1 mm (0.0394 ~ 0.0433 in.)

Inspect Ignition Coil
1.
Measure the primary coil resistance between terminals (+) and (-).

Standard value: 0.62Ω ± 10%

Removal and Installation

1.
Disconnect the ignition coil connectors (A).
2.
Remove the ignition coils (A).
Tightening torque :
3.9 ~ 5.9N.m (0.4 ~ 0.6kgf.m, 2.9 ~ 4.3lb-ft)

3.
Installation is the reverse of removal.

    Description and Operation
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