Testing & Diagnosis: Injectors
- Pressurize fuel system and disconnect wiring connectors from all 4 injectors. Connect a fuel pressure gauge to pressure relief valve on fuel rail. Connect one injector at a time and crank engine for 5 seconds. Record pressure immediately after cranking.
- Repeat procedure for all 4 injectors. Pressure readings of all injectors should be within 4 psi (.3 kg/cm2 ) of each other. If any injector is outside this range it must be replaced.