Author Topic: ECM swap question (Read 3045 times)

bme30 · « **on:** November 30, 2008, 07:47:51 AM »

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 · « **Reply #1 on:** November 30, 2008, 09:09:15 AM »

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 · « **Reply #2 on:** November 30, 2008, 04:54:50 PM »

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 · « **Reply #3 on:** November 30, 2008, 08:59:56 PM »

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