BMW ECU 352 750i two chips, one bin? HUH?!!

odddoylerules · Post by **odddoylerules** » Sun Jan 16, 2011 7:48 pm

Ive read they are not identical, and ive also read they are identical but you have to offset one chip when you burn it. Unfortunately, i cannot find that last article again... and dont remember which ecu the offset chip should go in.

SO.

theres only one bin in the dl section, if the 2 bins are totally different shouldnt there be two?

whats the story with this ecu?
Is the phantom article correct?

several performance chip manuals ive found say that the chips cant be interchanged.

whats up?

prj · Post by **prj** » Wed Feb 02, 2011 12:58 am

Read both from the ECU and compare them?

revlimit · Post by **revlimit** » Sun Feb 06, 2011 11:37 am

they should both be identical last time I check.

odddoylerules · Post by **odddoylerules** » Mon Feb 07, 2011 12:24 pm

were good to go, i fried one on the DME chips after removing it, I just burned a duplicate of DME 1 and it works great.

Pacman · Post by **Pacman** » Sat Mar 05, 2011 9:49 am

It is two identical chips because its two identical DME boxes!
Its just as simple as that

The whole EMS is built by components from the six cylinder engines, and then doubled up!
Two DME (and one EML-box which sync and drive the throttles)
Two crankpickups
Two MAF-sensors
Two CLT-sensors (and one third for the instrument)
Two sets of ignition coil + distributor
...and so on...