I had problems with the R-VIT also. I can't say 100% but it seems that it will not work with 16 bit ECU's.I tried it on 5 8bit ECU (JDM also) and it worked. Tried the same unit on 3 different 16bit ECU's and it would not connect. Stock or modified EPROM chips made no difference.
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 1995 300ZX TT |