Fuel Injector: Testing and Inspection

Fuel Injector Inspection:

Electrical Inspection
- Connect ohmmeter across injector terminals.

Desired - 13.4 to 14.2 ohms @ 68°F (20°C)

- Connect ohmmeter between injector body and each terminal.

Desired - No continuity

Injector Testing:

Functional Inspection
- Remove fuel injectors, refer to COMPONENT REPLACEMENT AND REPAIR PROCEDURES.
- Connect injector to fuel rail with a length of fuel line and suitable adapters.

Jumper Installation:

- Pressurize fuel system by installing a jumper wire between Check Connector terminals +B and FP.

Testing Fuel Injector Operation - Current Applied:

- Place injector over a graduated cylinder.
- Apple battery voltage to injector for 15 seconds.

Desired - 45 to 55 cc/15 seconds
Less than 5cc difference between injectors


- Disconnect battery voltage and inspect injector for leakage.

Desired - One drop per minute or less

- Remote jumper wire.
- Reinstall injectors.