Fuel Injector Coil Test - ECT Temp Outside 10-35 Deg C

Diagnostic Chart:

Description:

Test Description

Caution: In order to reduce the risk of fire and personal injury, wrap a shop towel around the fuel pressure connection. The towel will absorb any fuel leakage that occurs when installing the fuel pressure gauge. Place the towel in an approved container when the installation of the fuel pressure gauge is complete.

2. The engine coolant temperature affects the ability of the fuel injector tester to detect a faulty fuel injector. If the engine coolant temperature is between 10°C-35°C (50°F-95°F), go to Fuel Injector Coil Test Procedure - Engine Coolant Temperature 10°C-35°C (50°F-95°F). Fuel Injector Coil Test - ECT Temp Between 10-35 Deg C

3. The voltage displayed by the DMM in the first second nay be inaccurate due to the initial current surge, therefore. record the lowest voltage displayed by the DMM after the first second of the test. The voltage displayed by the DMM nay increase throughout the test as the fuel injector windings warm and the resistance of the fuel injector windings changes An erratic voltage reading (large fluctuations its voltage that do not stabilize) indicates an intermittent connection within the fuel injector.

4. From the voltages recorded, identify the highest voltage, excluding any voltages above 9.5 volts. Subtract each voltage that is not above 9.5 volts from the highest voltage. Record each subtracted value, Refer to the examples in the following table. The subtracted value for any fuel injector must not exceed 0.6 volt. A fuel injector with a subtracted value that is greater than 0.6 volt is considered faulty and must be replaced. A fuel injector with a recorded voltage above 9.5 volts is also considered faulty and must be replaced.