is there any way to leave the existing ecu computer hooked up after engine swap and still have everything working. and have a different ecu for the engine?

 

what kind of engine swap are we talking about?

 

4bt cummins
tranny: th400 or similar version or 4l80e

 

depends on the year but most likely not. if you fool the computer into making sure the security is good and making sure its gets a signal.

Didn't you research this before wasting your time and money? Or did you assume one engine is the same as all the others?

 

number one i did not assume anything nor waste my money. thats why i asked beacause i did not know. the 4bt doesnt need an ecu so i was just thinking that you could turn off the codes with a scanner for the landrover ecu