ECM swap question

[bme30]

it was recently mentioned to me that i could swap out the ECM from a M44 and use it for my M42. Because the M44 ECM is more advanced it can read and calculate the engine info faster therefore having a more efficiant M42 motor.

Has anyone heard of this or tried it? I tried a search but no luck.


Thoughts?

[tjts1]

No it doesn't work like that. You would also have to swap over the whole wiring harness to the engine and sensors. The M42 and M44 have very different engine management systems.

[bme30]

so it sounds like i might as well just swap over the entire m44 with harness and ecm.. only after my m42 goes.

thanks

[ajatya2]

yea m42 OBD-I, M44 OBD-II it would be a pain to swap the harness and i personaly dont think that it would acomplish much because OBD-II is a pain to tune and to get the best power out of bolt on parts your gona have to flash the ECU