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 go to H6. H6 - Cylinder Balance Diagnostic Test Mode: SFI Engines
No -- Refer to Fuel Delivery and Air Induction/Testing and Inspection.