Q: How to test and remove Fuel Injector and Fuel Rail on Dodge Challenger?
A: To perform an injector resistance test, remove the engine cover and disconnect the fuel injector connector. Use a DVOM to measure the resistance. If not within spec, replace it. For V6, relieve fuel system pressure and disconnect battery cable. Remove air intake duct and upper intake manifold. Disconnect fuel supply line and electrical connectors from injectors. Clean debris and remove fuel rail and injectors. Remove safety clips and O-rings. Coat new O-rings with oil and install. Install injectors into fuel rail and tighten bolts. For V8, relieve fuel system pressure and disconnect battery cable. Remove air intake duct and housing, disconnect PCV hose and fuel supply line fitting. Disconnect electrical connectors from all eight injectors. Remove injector retainer clip and pull injector out. Discard O-rings and install new ones. Install injectors into fuel rail and tighten bolts. Turn ignition switch to On to activate fuel pump and check for leakage.