where is the ecu on a 85 xj 12
#1
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Hey everyone my grandfather owns a 1985 xj12 vander plas edition. The car has had quite the history of floods and bad mechanics. I was going through the wire harness and I have found random wires leadimg to no where connector unconected with nowhere to connect too. Part of going through the harness lead me underneth the passengers side dash where I came across a green box that had a four wire connector connected and also a single wire connector. My question is this the ECU? The box says turbo power by BAE. Could this be after market??
#3
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When you remove the trim panel in the trunk, you will see a few 'things electrical' mounted on the rear firewall. The ECU is mounted on a slide-in typoe bracket, and is easy to remove once the connection is taken off. On V12s there is also a tube from the inlet manifold to allow the ECU to detect manifold pressure. I think the system is Lucas-Bosch D-Jetronic. It was L-Jetronic on the sixes.
#4
#5
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When you remove the trim panel in the trunk, you will see a few 'things electrical' mounted on the rear firewall. The ECU is mounted on a slide-in typoe bracket, and is easy to remove once the connection is taken off. On V12s there is also a tube from the inlet manifold to allow the ECU to detect manifold pressure. I think the system is Lucas-Bosch D-Jetronic. It was L-Jetronic on the sixes.
Then if the ECU isnt on the passengers side under the dash what would be, cause its a green box, heres a pic of it
![](http://i1020.photobucket.com/albums/af322/mrg7243/0719100933.jpg)
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Yeah, these gizmos have been cooked up by many. Usually mess with spark advance curves and some with mixture mapping as well. The original ECU's are designed for a broad spread of driving use. These narrow the field with some performance boost in places.
My vote would be to track down the leads and get the unit outta there. Hopefully it is spliced in so that restoration is not a nightmare.
My car is not a 12, but, it's ECU was in the boot.
My vote would be to track down the leads and get the unit outta there. Hopefully it is spliced in so that restoration is not a nightmare.
My car is not a 12, but, it's ECU was in the boot.
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