On 1999 Honda Civic DX Hatchback having engine JDM Civic SIR II in a half-year operation engine work is broken. The engine loses a throttle response, smokes. Visual inspection has revealed failure of injectors. However replacement of an injector Number One not help.Car Wiring Diagram offers such order of elimination of failure. As you can see in the car wiring diagram below, the injector electrical circuit is very simple. Power to the injector comes from the Main Relay and the ground is supplied by the PCM.Since only one or two injectors are effected, and replac injector number one, it's safe to assume that the injectors and the injector wiring are all good. So that leaves the ground side. Check the brown wire for injector number 1 at the PCM connector. With the key ON and engine OFF, there should be power at the PCM. Do this for the red, blue and yellow wires for injectors number 2, 3 and 4 respectively.If you have power, jiggle the wire harness at the injectors to see if the light flickers. If it does, you have a damaged connector.Check the wiring from the injectors to the PCM very carefully for breaks and shorts. If the wiring is all good, then you have a bad PCM.
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