my engine fu*k up at track last week, so I decide to get the JDM engine(1999). my problem is that do I need to buy the JDM CPU to work with the JDM engine, or I can just use my original USM CPU, and will it hurt my performance (I think the cpu is different becasue we have more stirct emission test here)? please help. Thanks in advance !

 

You may have a problem running the USDM ECU because I don't believe the JDM engine uses a crank position sensor. Not positive though.

 

if it can't work with my 2000 USM CPU, I got no choice to spend few more hundred to buy the JDM CPU

 

You could use you USDM ecu but you need to connect the VTEC oil pressure sender from you old engine into you new one. It still wouldn't be a very good mate though because of the compression differences. Maybe it's time you look into Hondata!

 

If you buy a jumper you can use a OBD1 P72 or P28.

 

thanks for the replies .. btw what's P72 or P28 ? which is better for me? thanks again !!

 

Both can be cheaped with ease. P72 is GSR and P28 is Civic EX. Your other choice would be a P30 from a Del Sol or JDM Civic. P28 doesn't have knock sensor capability.