![]() The PDF Instructions linked below will explain this process in detail The process is the same for each ECU but the location and number of EPROM chips will vary by model. To do this you will need to heat each pin of the PROM chip and wick away or use a De-soldering iron or Sucker to remove the hot liquid solder. Now you can start the work of removing the EPROM chips that hold the Fuel and timing maps. Next you will need to clean everything that you will be soldering/un-soldering with acetone as the factory covers everything in a lacquer to protect it from the elements. 88-89 Single ROM chip - Has pads for wiring.87 Single ROM chip - have to solder to CPU.86 Dual ROM Chips - have to solder to CPU.84-85 - Dual ROM chips - have to solder to CPU.Once you pull your covers off you will need to determine the type of ECU you have as there were 4 board revisions through out the Z31 life. I installed my own NISTUNE board into my ecu myself and it wasn't that hard to do with basic soldering knowledge.įirst start by removing the 4 screws on both the front and back cover of the ECU being careful as they can strip the heads if the ECU was exposed to the elements. ![]()
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