CSi CABLING CONNECTION QUESTION

[LEO]

Hi, I’m looking for some guidance and insight on the restoration of my E9 CSi, which has been disassembled since 2019… ;(

While restoring the wiring harness, we came across what might be the connection to this device. At this point it’s more of a suspicion, since we found it inside the front harness that connects the lights, the coil, and the relays located near the battery.

If anyone knows what this device is, what its function might be, and what the correct wiring should look like (in my harness the wires are crystallized), I’d really appreciate your help.

The two connectors are a bit confusing: one seems to go to ground, while the other has two wires of different colors that don’t let me clearly identify their origin, and the wiring diagram isn’t helping me much either.

I’m attaching a picture I found on the forum, highlighting the device that I suspect fits that connector.

Thanks in advance for any help.
Best regards,

 

[HB Chris]

Cold start injector

 

[LEO]

Thanks, Chris. Do you know where I can find information about the wiring for that injector? Do you know if I’m right in associating it with that harness?

 

[HB Chris]

I would think that wire would be located with injector wiring but I don’t have a CSi.

 

[ScottAndrews]

That is the cold start injector. My understanding is that one side is connected to the start circuit and the other gets grounded through the Thermo Time Sensor, which is mounted over near the thermostat housing

 

[sfdon]

Hello Leo-

The picture is the Cold Start Injector.
Only 2 wires go to it and they come from the other side of the engine at the main engine harness tube above the valve cover.
The 2 wires go under the intake- not over.

Both wires are white and they both go directly from the injector to the Cold Start Relay at the brake booster area next to the main relay.

If you need I can explain how the time switch works.

In the schematic the injector is 159, the relay is 169, the temperature time switch is 160.
Power for the relay comes from pin 19 of the ECU and relay is triggered by the ignition switch (black wire at connector 168)
Keep in mind that almost all wires in the engine harness are white and have tiny numbers printed on them.

I will include a Csi injector schematic soon.

Send me a DM if you need more info- warning my Spanish is only so-so!
I am in Portugal this week and Spain next week.