RS 6 V8-4.2L Turbo (BCY) (2003)
Fuel Injector: Testing and Inspection
Injectors, Checking
Injectors, Checking
NOTE: To gain access to the injector connectors, the engine cover and air cleaner housing must be removed.
Electrical check on injectors
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Disconnect connector at injector to be checked.
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Connect portable multimeter to injector for resistance measurement.
Specification: 13...16 Ohm
NOTE: With warm engine, injector resistance increases by approx. 4...6 Ohm.
If reading does not match specification:
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Replace injector.
If reading matches specification:
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Check power supply.
Checking power supply
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Disconnect connector at injector to be checked.
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Connect diode test lamp for voltage measurement to socket 1 of connector and Ground.
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Operate starter for several seconds (engine may start).
Specification: Diode test lamp must light
If diode test lamp lights:
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Check wiring.
If diode test lamp does not light: