8D - 42 IGNITION SYSTEMS		Ä

(4) Install coil. Tighten coil mounting screws to 12 NIm (105 in. lbs.) torque.

(5) Connect electrical connector to coil.

DETONATION (KNOCK) SENSORÐTURBO III ENGINES

The detonation sensor is located on the intake manifold, behind the PCV breather (Fig. 5).

Fig. 3 Coolant Temperature Sensor

REMOVAL

(1)Drain cooling system until coolant level is below coolant sensor. Refer to Group 7, Cooling System.

(2)Remove electrical connector from coil (Fig. 4).

Fig. 4 Ignition Coil Removal

(3)Remove coil mounting screws.

(4)Rotate coil away from coolant temperature sen-

sor.

(5)Disconnect electrical connector from coolant temperature sensor.

(6)Remove sensor from engine.

INSTALLATION

(1)Tighten the coolant sensor to 7 NIm (60 in. lbs.) torque.

(2)Connect electrical connector to sensor.

(3)Fill cooling system. Refer to Group 7, Cooling System.

Fig. 5 Detonation SensorÐTurbo III Engine

REMOVAL

(1)Remove PCV breather.

(2)Remove harness connector from the detonation sensor.

(3)Remove detonation sensor.

INSTALLATION

(1)Install detonation sensor. Tighten sensor to 9 NIm (7 ft. lbs) torque.

(2)Connect harness connector to detonation sensor.

(3)Install PCV breather.

SPARK PLUG CABLE SERVICE

Clean high tension cables with a cloth moistened with a non-flammable solvent. Wipe the cables dry. Check for brittle or cracked insulation.

When testing cables for punctures and cracks with an oscilloscope, follow the instructions of the equipment manufacturers.

CAUTION: Do not leave any one spark plug cable disconnected any longer than necessary during test or possible heat damage to catalytic converter will occur. Total test time must not exceed ten minutes.

If an oscilloscope is not available, cables can be tested as follows:

(1) With the engine not running, connect one end of a test probe to a good ground. Use a probe made of insulated wire and insulated alligator clips on each end.