HD11 - Check Ability of Fuel System to Hold Fuel Pressure

- Start and run engine at idle. Note fuel pressure.

- Increase engine speed to 2500 rpm and maintain for one minute.

- 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.

- Turn Engine Off.

- Key On, Engine Off.

- Does fuel pressure remain at specification for 60 seconds?

YES -- GO to HD12. HD12 - Check Fuel Injector For Flow and Leakage

NO -- GO to Pinpoint Test Step HC9 to determine which area within the Fuel Delivery System is at fault. HC9 - Check Regulator For High Pressure Cause