H3 - Check Systems Ability to Hold Fuel Pressure

- Pressurize fuel system per step H2.

- 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 H4. H4 - Fuel Delivery Test

For Service Codes or other Symptoms:

MFI: Go to H5. H5 - Cylinder Balance Diagnostic Test Mode: MFI Engines

SFI: Go to H6. H6 - Cylinder Balance Diagnostic Test Mode: SFI Engines

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