i have an 02 EP3, if i get an 04-05 ECU or any 02-05 ECU, will my car run off it before k-pro install or even after? or can you just plug and play ECU's? i want to send my original out and use the 04-05 while mine is being processed..

 

No because the immobilizer will not allow it to run unless you get it keyed.

 

Just send your spare ecu in for Kpro. When you get it back, install it andyou can start your car with Kpro by disabling the immobilizer. Then you can drive it to Honda to get the immobilizer reprogrammed