Volkswagen Golf/Jetta 2 manual

Fuel injectors - testing
Fuel and exhaust systems - Digifant fuel injection / Fuel injectors - testing

1 Refer to Part B of this Chapter, Section 13, paragraphs 1 to 3, but in addition, carry out the following electrical tests (see illustration).

8.1 Fuel injectors and pressure regulator components
8.1 Fuel injectors and pressure regulator components

2 Disconnect the wiring plug from the conduit next to the injectors and connect an ohmmeter across the terminals on the conduit. The resistance of all four injectors should be 3.7 to 5.0 ohms. If any number of injectors are open-circuited, then the resistance will be as follows: One injector open-circuited - 5.0 to 6.7 ohms Two injectors open-circuited - 7.5 to 10.0 ohms
Three injectors open-circuited - 15.0 to 20.0 ohms
3 If necessary, prise off the conduit and check that each individual injector has a resistance of 15.0 to 20.0 ohms.

4 Checking the injector spray patterns cannot be performed as described in Part B of this Chapter, due to the position of the fuel distributor. However, the injectors may be removed together with the fuel distributor and wiring conduit, and the engine turned on the starter for a few seconds. Use a suitable container to catch the fuel.

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