My 1986 325ix came with a 073 35 pin ecu. I am contemplating swapping to the 173 ecu as I am in the middle of a rebuild on it and have the motor apart.
What else do I need to do to swap it, here is what I have for necessary changes:
Swap engine harness
swap ecu
swap CPS
Swap smooth crank pulley damper wheel to toothed pulley damper wheel
Remove transmission sensor and replace
Is there anything else? What about the Check Engine Light on the dash?
I heard the connectors on the transmission sensor may be different, can anyone verify this?
What about the fuse box? Is it different or can it be re-used?
Thanks!
EDIT*
I found this,
I also found change 6th HT lead, what is this?
What else do I need to do to swap it, here is what I have for necessary changes:
Swap engine harness
swap ecu
swap CPS
Swap smooth crank pulley damper wheel to toothed pulley damper wheel
Remove transmission sensor and replace
Is there anything else? What about the Check Engine Light on the dash?
I heard the connectors on the transmission sensor may be different, can anyone verify this?
What about the fuse box? Is it different or can it be re-used?
Thanks!
EDIT*
I found this,
The early motronic uses two sensors attached to the gearbox. The later has just the one at the front.
The later loom has different pins at the brake master cylinder and coolant and washer bottle, they are round pins so you might need to look at that as well.
It is a straightforward swap and there is no need to remove the engine or gearbox it can be done in place
The later loom has different pins at the brake master cylinder and coolant and washer bottle, they are round pins so you might need to look at that as well.
It is a straightforward swap and there is no need to remove the engine or gearbox it can be done in place
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