Fuel Injectors
WARNING: This page is about a different car, the 1996 Volvo 850. However, it is still accessible from the selected car via links, so may be relevant.
Turn ignition off. Disconnect fuel injector connector. Measure resistance between injector terminals. With injector temperature at about 68°F (20°C), resistance should be about 14.5 ohms. Replace injector as necessary.