ok im selling my crx but im kinda confused with the engine. ok the engine says: D15b 1664562 But its registered as a 1.6 L. The valve cover says 16 valve and it has the PGM-FI Dual Point what could it be? D15b2? D15b1? D15b7? any help? or is there anything else that would tell me exactly what engine it is?