Old style PTUs are known for going bad; causing all sorts of poor running conditions or even shutting down completely, these problems were so bad in fact that Nissan had a campaign to update them to the Version 2 style with an updated PTU and patch harness. While this was nice and a really quick procedure (for warranty tech pay on their part), there was still an issue with these parts.... the old style connectors on the original harness aren't sealed so really bad corrosion at this point in the ignition circuit is really common and often causes the same running issues, or worse not running at all. Sometimes the connections can simply be cleaned from the connector, but often problems will persist because the corrosion has worked its way into the harness.

The good news is that the connection on the new style PTU is sealed, if the harness doesn't have corrosion in the wires eliminating the old style connection on the patch harness is the common way to rid yourself of these pesky problem. Often though the harness has corrosion in it and the labor investment isn't worth the fight for a fix that may still cause problems in the future.

Now you can get a high quality solution with or without wires to repair this problem or to custom build your own harness, and for well under half the cost of the OEM plug and play harness that isn't sealed.

If you are looking for the best spark and performance out of your Z, eliminating corrosion anywhere in the ignition circuit should be one of your top priorities.