plymouth Workshop Repair Guides

Plymouth Workshop Service and Repair Manuals

Initial Inspection and Diagnostic Overview|Page 3376 > < Fuel Injector|Specifications|Page 3373
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Fuel Injector: Initial Inspection and Diagnostic Overview

Harness Inspection

Step 1

Step 2

Actuator Inspection

Checking Operation Sound

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Using a sound scope, check the operation sound ("chi-chi-chi") of injectors during idling or during cranking.

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Check that as the rotating speed increases, the frequency of the operating sound also increases.

Note:  If the injector you are checking is not operating, you may hear the operating sound of the other injectors.

Note:  If no operating sound is heard from the injector being checked, check the injector drive circuit. 

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If there is nothing wrong with the circuit, a defective injector or engine control module is suspected.

Initial Inspection and Diagnostic Overview|Page 3376 > < Fuel Injector|Specifications|Page 3373