I was browsing through some auction sites for the 8bit PFC for my 3rd gen 91-95 model but only information I'm given in the auction is the serial number, as it is all in Japanese. How would you be able to tell from this serial number alone that this is the right PFC for my car as I'm aware there are 3 versions avalaible for the 3rd gen and I dont want to end up buying the 16bit later versions.

Cheers

 

AFAIK all PFCs have a 16-bit CPU, the older ones the NEC 78K3 and the newer ones the 78K4.

414-Z001 RX-7 FD3S(IV) 13B-REW 12/1995 - 11/1998 FD3S
414-Z002 RX-7 FD3S(I~III) 13B-REW 12/1991 - 11/1995 FD3S2
414-Z003 RX-7 FD3S(V) 13B-REW 12/1998 - FD3S3
414-Z004 RX-7 FD3S(I~III) 13B-REW 12/1991 - 11/1995 FD3S4
414-Z005 RX-7 FD3S(IV) 13B-REW 12/1995 - 11/1998 FD3S5
414-Z006 RX-7 FD3S(V) 13B-REW 12/1998 - FD3S6

 

Just for some confusion - in Japan, they frequently refer to the '92-95 ECU's as 8-bit, and the later ECU's as 16-bit, which is true. It's kind of a fallacy to refer to the PFC's as the "8-bit version" - that just means it works on the earlier cars.

Read my PowerFC FAQ for lots more information -

http://www.clubrx.org/media/pfc/PowerFC_FAQ.pdf

Dale