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Injectors @ 6V while unplugged and ECU ground disconnected... I'm guessing there isn't power there at all, and 6V is a backfeed from somewhere - disconnected ECU ground is giving a false reading of 12V as there isn't an earth path for whatever it is anymore. I rarely use a voltmeter for testing pow...

'I also tested the wiring loom with the use of the continuity function on my multimeter. I tested continuity between pin 8/9 on the ECU connector and the four injector connectors. I found out that I got signal between pin 8 and both pins in each of the four connectors. Same for pin 9. Isn't that st...

Are you sure you are not powering the injectors through the coil of the main relay somehow? Did you install the relay/ is there one? Can you verify that your wiring is anything like the DTA drawing and that you are not using some ballast resistor? Not sure of anything at this point :? I'm not that ...

For anyone else interested, I have now re-done the following steps: - Unplugged all injector connectors, coil pack, TPS, coolant temp, inlet air temp and crank sensor - Power on ECU and measuring voltage to injector connectors. This was 6v on all four connectors - With ECU ground disconnected I got ...

Very little of this thread makes any sense. The chances of a wiring loom being so bad...are just unrealistic. I honestly have to question the measurements that are being taken as they just make little sense. Whether the meter is faulty, or the person using the meter... Exactly how are you measuring...

stevieturbo wrote:I really dont see how you'd ever get a 6v reading testing for power on injector wiring on a 12v powered car. Unless the cars battery is almost flat.

You havent added some resistors on the power supply to the injectors or something ?

Not that I am aware of

Sounds like you have the injector relay wired incorrectly or are measuring the wrong side of the injector. You will get continuity of sorts if the injectors are plugged in. If you are getting continuity between ecu pin 8 (with the plug out) and both connectors on the injectors (with the injector ou...

Ok, I have now done some trials and have established that I have 6v on all four injectors, not 12v. This was done with ECU power on but not cranking. I also tested the wiring loom with the use of the continuity function on my multimeter. I tested continuity between pin 8/9 on the ECU connector and t...

I'm on a business trip this week so any further testing has to wait until the weekend.

I'm using a wiring loom from ST Motorsport. The ECU is synchronising. Very strange....