Z31/IACwiring php
Imported page. This page was converted from an archived copy of "Z31 Idle Air Control Wiring for the NA to Turbo Swap" (Xenonzcar, fetched 2026-05-15). The conversion was mechanical, so tables, links and formatting may contain conversion artefacts. Compare against the archived copy if something looks wrong. The content belongs to its original authors.
Z31 Idle Air Control Wiring for the NA to Turbo Swap
Ok for those of you who have done the N/A to Turbo Swap on your Z31, Here is how to wire the idle controls for proper operation.
Items needed
- 2 female spade connectors
- Razor knife
- Crimper or pliers
- Extra wire (if needed)
Process
- Locate the 4-pin connector on the N/A harness that went to the N/A idle controls (on the intake plenum, driver side).
- Remove the N/A connector by unhooking the wires inside the connector. Plug these wires into the new turbo connector (use a small pick to lift the tab and release each wire terminal).
- Only reconnect the two wires for the idle up solenoid.
- The other two wires (black and blue) are for the idle control device:
- Black wire: Connects to the "up and down |" pin
- Blue wire: Connects to the "side to side -" pin
Sources Used
1984-1988 Nissan 300ZX Factory Service Manual- Written By: Hendrick301