As Richard pointed out in an earlier post on 8/11, you can see that YR and YB (the two wires in question to the wheel speed sensor) via the chassis/engine connector are routing via a joint bomb to many of the sensors on the engine. The idling problem is solved when I disconnect these YR/YB wires at the speed sensor.
This could point to the problem being in the wiring from the speed sensor to the joint bomb. Perhaps the solution is to cut YR and YB and remake the wiring from the speed sensor plug to the bomb? RIchardV6 does this sound sensible?
Sincere apologies Chris, I failed to fully read Laurens last post and was fixating on what he had previously told us. So now yes your suggestion sounds sensible although Laurens confirms previously he had tried the working speed sensor from his other car with no change to idling fault, presumably by using its own plug into the chassis loom, which would surely rule out any fault on the original sensor
For clarity the image below shows the speed sensor connection top left and what I still presume is the raw speed signal distribution bombtail bottom right. This is unusual in the fact all four wires are differing colours.
Perhaps Laurens could re-confirm the engine idles correctly with the speed sensor disconnected. This would prove idling issues are not being caused by the YB or YR wires within the chassis loom as they route directly and exclusively to the engine loom connection.
Richard
2018 Roadster 3.7 1966 Land Rover S2a 88 2024 Royal Enfield Guerrilla 450 1945 Guzzi Airone
and was fixating on what he had previously told us. So now yes your suggestion sounds sensible although Laurens confirms previously he had tried the working speed sensor from his other car with no change to idling fault, presumably by using its own plug into the chassis loom, which would surely rule out any fault on the original sensor 
![[Linked Image]](https://i.imgur.com/RHIsxXy.png)
