z31.com | Nissan PROM tuning | Romulator Installation

The Romulator is a device that impersonates a prom chip and allows you to make changes to the simulated prom chip on a Windows computer without having to burn and install a chip after every change. They are available for under $200 from Transtronics.

A Romulator can be installed in any 28 pin ECU(ie. 88-89). You can't install it in 84-87 ECUs because they have 26 pin chips.

Start with your 88-89 ecu:

Take the cover off:

The prom is circled:

Desolder it(this is the hard part) and install a 28 pin socket:

Obtain a romulator:

Install it:

Bend some resistors to make room for the cable:

Bend the edge of the case to let the cable pass through. Make sure the case doesn't chafe through the cable insulation:

Load a rom into the romulator software:

Since that stuff is all greek, use one of the software packages that gives a legible display of the data and edit. Save data and update the romulator to test results:



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