HA3 - Check System's Ability to Hold Fuel Pressure

- Cycle the key on and off several times. Note the fuel pressure.

- 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.

- Does fuel pressure remain at specification for 60 seconds?

Yes -- Verify integrity of air intake, air filter, no vacuum leaks, EGR valve closed. Go to HA6. HA6 - Diagnostic Test Mode (DTM): SFI Engines

No -- Refer to Fuel Delivery and Air Induction.