cadillac Workshop Repair Guides

Cadillac Workshop Service and Repair Manuals

Idle Speed > < Fuel Pressure Gage Installation and Removal|Page 6476
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5. Operate the vehicle within the conditions of the customer concern while monitoring fuel related parameters with a scan tool.

‹› If the scan tool parameters indicate a lean condition, test/inspect for the following:

*

Restricted fuel feed pipe

*

Restricted fuel filter 

*

Restricted siphon jet pump

*

Restricted transfer lines between fuel tanks

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Faulty fuel pressure regulator 

*

Poor connections at the harness connectors and ground circuits of the fuel pump 

‹› If all components test normal and the scan tool parameters indicate a lean condition, replace the fuel pump.

Repair Instructions

Perform the Diagnostic Repair Verification  (See: Computers and Control Systems/Testing and Inspection/Diagnostic Trouble Code Tests and
Associated Procedures/Verification Tests and Procedures) after completing the diagnostic procedure.

*

Primary Fuel Tank Module Replacement  (See: Fuel Delivery and Air Induction/Fuel Tank Unit/Service and Repair/Primary Fuel Tank Module
Replacement)

*

Fuel Injector and Fuel Rail Replacement  (See: Fuel Delivery and Air Induction/Fuel Injector/Service and Repair/Fuel Injector and Fuel Rail
Replacement)

Idle Speed > < Fuel Pressure Gage Installation and Removal|Page 6476