Hyundai Sonata 1991 Shop Manual page 155

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IGNITION
SYSTEM
5.
Tighten spark plug to specified torque.
If it is overtorque, damage to threaded portion of cylinder head
might result.
Spark plug: 20-30 Nm (204-306 kg.cm. 15-21 Ib.ft)
IGNITION TIMING
IGNITION TIMING ADJUSTMENT
Adjustment conditions:
Coolant temperature: 80-95°C (176-205°F)
All accessories: Off
Transaxle: N (Neutral)
Parking Brake ON
1.
Connect timing light.
2.
Start engine and run at curb idle speed.
Curb idle speed: 750
±
100 rpm
3.
With the engine stopped, connect a lead wire with alligater
clips to the terminal for ignition-timing adjustment (located in
the engine compartment), and ground it.
4.
Start and run the engine at curb idle speed.
5.
Check basic ignition timing and adjust if necessary.
Basic ignition timing: 5°
±
2° BTDC
27-36

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