HEY I GOT 96 HONDA CIVIC WITH A 99 SI B16 ENGINE AND I BYE THE JUMPER OBD2 TO OBD1 CONVERSION I WANNA KNOW WHAT ECU I HAVE TO PUT ,A P28 SHIP OR P30 BECAUSE I PUT A REGULAR P28 AND THAT CAR DON'T GOINNG NO WERE.

 

Have you tried getting a OBD2a to OBD2b jumper harness and putting on the stock Si ecu in to see if it runs?

 

no

 

If you want to run the P28, you'll need to chip it and run the correct B16A base map, or have it tuned.

 

HEY I GOT 96 HONDA CIVIC WITH A 99 SI B16 ENGINE AND I BYE THE JUMPER OBD2 TO OBD1 CONVERSION I WANNA KNOW WHAT ECU I HAVE TO PUT ,A P28 SHIP OR P30 BECAUSE I PUT A REGULAR P28 AND THAT CAR DON'T GOINNG NO WERE.

 

You've be given the answer. Please stop re-posting the same question, and please stop typing in all caps.

 

soo what havd to do , buy a p28 ship or the jumper ob2a to ob2b ?

 

Either run the Si ECU (P2T) or use a conversion harness to run a chipped P28 with the proper maps.

 

What you NEED to do is get a 96-98 Ex, or the original, harness back in there and modify to suit. If you want to run an OBD2a-OBD2b conversion harness so you can run the P2T ECU, then do that. But don't run the Si harness in your 96 Civic.