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IGNITION SYSTEMS 8D - 11 |
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Fig. 31 Ignition CoilÐ3.0L Engine
2.2L TBI, 2.5L TBI, TURBO I AND 3.0L IGNITION SYSTEMSÐ
DIAGNOSTIC PROCEDURES
INDEX
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page |
Coolant Temperature Sensor Test . . . . . . . . . . |
. . . 13 |
Detonation (Knock) Sensor . . . . . . . . . . . . . . . . |
. . 13 |
Failure to Start TestÐ2.5L Tbi and 3.0L Engines |
. . 12 |
General Information . . . . . . . . . . . . . . . . . . . . . |
. . 11 |
Ignition Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. . 11 |
GENERAL INFORMATION
For additional information, refer to On Board Diagnostics in the Fuel Injection General Diagnosis sections of Group 14. Also, refer to the DRB II tester and appropriate Powertrain Diagnostic Procedures Manual.
SPARK PLUGS
Faulty or fouled spark plugs may perform well at idle speed, but frequently fail at higher engine speeds. Faulty plugs can be identified in a number of
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page |
Manifold Absolute Pressure (MAP) Sensor Test |
. . . 13 |
Poor Performance Test . . . . . . . . . . . . . . . . . . |
. . . 13 |
Spark Plugs . . . . . . . . . . . . . . . . . . . . . . . . . . |
. . . 11 |
Testing for Spark at Coil . . . . . . . . . . . . . . . . . . |
. . 12 |
ways: poor fuel economy, power loss, decrease in engine speed, hard starting and, in general, poor engine performance.
Spark plugs also malfunction because of carbon fouling, excessive electrode air gap, or a broken insulator. Refer to the General Information Section of this group for spark plug diagnosis.
IGNITION COIL
The ignition coil is designed to operate without an external ballast resistor.