1984 na ecu

[Zedstar]

Cannot find info on how to socket/upgrade EPROM on this ECU. There is plenty of info on how to install Nistune Board, however only want to swap EPROM for injector upgrade

[kaur]

There might be some info on older pages. Like this for example http://redz31.suomiz.net/pages/fuel/romulator.html

[Dunkine]

XenonZCar - http://www.xenonzcar.com/z31/nistune.php

and yes, it's about installing the NIStune board, but it shows the EPROM for the 84-85 for fuel & timing maps.

[Zedstar]

XenonZCar - http://www.xenonzcar.com/z31/nistune.php

and yes, it's about installing the NIStune board, but it shows the EPROM for the 84-85 for fuel & timing maps.

Thanks for your reply.

However , the instructions only relate to connections from the Nistune Board to CPU chip etc - not an EPROM. It appears that a replacement EPROM can be only loaded to later i.e 88ECU which are single EPROM.