Cant use a stock DX ECU and go DPFI... You will need the CRX/Civic Si ECU (PM6).

Heres a few write ups on DPFI to MPFI...
http://tech.hybridgarage.com/tech/4g...-zc-wiring.htm
http://www.angelfire.com/d20/hcivic88/dx-siwiring.html
http://www.geocities.com/c_rexboy/mpfi.html