chops10

ok on my accord there is a countershaft speed sensor that gives power to the two middle injectors, there must be some way that the sensor gets power from the transmission but i dont know how. does anyone know how that sensor gets power?

redbull-1

The countershaft speed sensor circuit runs through the Transmission Control Module (TCM) via the ECU. So, no, the speed sensor does not get power from the transmission. It is there to monitor the speed of the transmission.

If you have a problem with the fuel injectors and it is not the injectors itself, you should be checking the injector wiring and the injector resistor. The injector resistor is located as shown in this picture.

chops10

hey thanks for the help ive already checked the resistor box with an ohm meter and it all checked fine, i routed the wiring all the way from the middle injectors and they go straight to that sensor, which only has two wires going to/away from it and they go straight across the rear of the engine and to the injectors which really confuses me why honda would do it that way??

fleetw00d

Honda didn't do it that way. Are you tracing individual wires or just the wire bundle? The injectors get their power through fuse 20, thru the injector resistors, thru the injectors, then grounding of each injector circuit it controlled by the ECM. There is no direct connection between the injectors and either of the transmission shaft speed sensors.