Here's a MPFI Swap links
ECU: PM6 or PG7 ECU Obd0
MPFI Swap
ECU: P28 ECU obd1
D16Z6 Swap Into An EF(4th gen hatch, 2nd gen crx). Switching Over To OBD-1
Idle problem, check cap, rotor botton, & plugs. Also, clean IACV. IACV is located beside the Throttle body by #1 piston intake runner...