HB3 - Check System's Ability to Hold Fuel Pressure

- Pressurize fuel system per step HB2.

- Visually look for fuel leaking at the injector O-ring, fuel pressure regulator, and the fuel lines to the fuel charging assembly. Service as necessary.

- Key "ON", engine "OFF".

- Does fuel pressure remain at specification for 60 seconds?

Yes -- For No Starts: Go to HB4. HB4 - Fuel Delivery Test

For Diagnostic Trouble Codes (DTC) or other symptoms: Go to HB5. HB5 - Cylinder Balance Diagnostic Test Mode (DTM)

No -- Refer to Fuel Delivery and Air Induction/Testing and Inspection.