I am trying to get my FB running on a Haltech elite 1000 and noticed a weird issue with my injectors today. I wanted to crank the engine and check for spark without it running, so pulled the fuse to the injectors in the Haltech harness' fuse box. The car kept starting, every time. I unplugged my injectors and checked the power pin on the harness with the ignition switch on and got 35 volts. This is with the fuse pulled. I then pulled the relay out, opened up the fuse box for the first time and saw that sure enough pin 87 on relay 2 (injector relay) was showing 35 volts despite relay pin 30 showing 0 volts because the fuse was pulled. Pin 87 has two wires crimped into it – one going through the harness to the injectors (red), and a second (red/blue) going into the ECM at pin A26 (see picture below where my finger is pointing at injector relay pin 87).




So the next thing I did was de-pin A26 at the ECM connector and turn the ignition on again. This time I got 0 volts at pin 87 and in all injector connectors. This leads me to believe there is not a wiring mistake in the harness where the injectors are drawing power from somewhere else; the source of my 35 volt power seems to be ECM pin A26 "ECU Injector Power Input". The ECM wiring diagram also notes this is a "required connection for the ECM to run" so the fact that it puts out its own power AND that the ECM still works without this pin installed makes me wonder if there is something wrong with my Haltech itself. I also have weird power draw issues with my clutch switch like I described in another thread: https://www.rx7club.com/haltech-foru...issue-1150602/

Any advice on what to check next? I'll probably give Haltech a call tomorrow when they open and see if they can help too. This is a brand new Haltech

 

More information:

If I plug everything back in correctly including injector connectors, fuses, and relays, relay pin 87 for the injector relay shows 12v as expected! If I take out the 20amp injector fuse and nothing else, the pin 87 voltage jumps to 35 volts! Why? And if the ECM is able to provide power around the injector fuse, what's even the point of the fuse? I'll have to find another way to disable my injectors...

 

if youre trying to disable the injectors, you can do so in the elite software, theres a checkbox in settings to disable the injectors

 

Are you sure your meter is not reading 35mV? most meters have a default auto-range function that will switch to a lower scale for better resolution.