Im doing a swap from d16 to a b18a is it possible to use that old ecu from my single

 

Even if it was possible, You'd have to rechip the ECU for the proper fuel and ignition timing. Best routes in a swap like that is a proper ECU or a better ECU chipped to proper values.

 

ill chip your ecu... send it to me whatever day i get it it will be back to you in 4 days..... or just buy an obd-0 pr4

 

I'm new to car tinkering, so excuse me if this question seems trivial...but did you know you had to change the ecu because it won't light up? The reason i'm asking is because this is my issue now.

Thanks to all responders,

Rick