my car is a 2000 bmw 328i. I replaced motor and in all that was going on the shop lost my ecu. I was forced to get a ews kit, from a donor car a bmw 323ci. it worked and finely i was able to start car

I am guessing the new ECU is not compatible with your transmission. Why can't you make the shop buy you a correct ECU?

Ok here's the deal. I bought the donor car to make my car start. I was told or read the ews kit must be from a 1999 to 2000 bmw 3 series. the 323ci has everything my car has, the tranny is a GM trans like the trans I have in my car. the only other available transmission would have been a ZF, I stirred clear of that transmission. Also the EWS kit had to have Transponder, ignition , EWS, and computer. It worked. Except the first test drive would never happen. I tried the trans TCU from the 323ci and it did not work either. So im stumped. Is there anything I can do to program computer using INPA and a cable to ODB? Thank you for getting back to me. Im 55 and dont have a real income. I bought the car when I had some money after my Bro passed so im doing this car on a slim budget. It took hell to get to were I am but at least the motor hell that I went through is done. I never expected trans to not work since it worked before the engine went out.

I wish you luck but my limited knowledge of ECU's is that you need the exact part number ECU for your engine/transmission combo. Transmissions may be the same nominal part but there are differences from year to year and from model to model which can make them incompatible. Maybe a reflash to the correct operating program for your car can help, maybe. Mixing and matching random parts is only going to waste time and money as you are finding out.