Honda Civic SiR

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Honda Tips and Tricks

This page contains some of the tips and tricks that are useful for general maintenance of your Honda. At the moment there are only instructions on how to set the idle.

Set Idle

Set Idle

Setting the idle correctly on a Honda Civic (or any Honda) is important. If the idle is not set correctly the car will either idle too low, or it will idle too high causing the idle to surge up and down.

Instructions to set the Idle

  1. Warm the car up to operating temperature. This is generally determined when the radiator fan turns on if the car is stationary.
  2. Unplug the IACV valve on the back of the intake manifold. This needs to be done because the IACV valve is what the ECU uses to dynamically control the idle by allowing more or less air to bypass the throttle plate. Be careful not to burn yourself!
  3. Set the idle to 600rpm using the idle control screw. This screw controls the static amount of air that bypasses the throttle plate.
  4. Turn the car off and plug in the IACV valve.
  5. Reset the ECU. This needs to be done because the ECU will have thrown an ECU error code.
  6. Restart the car. The idle should be running nice and close to 750rpm.

There are other things that can affect the idle, but these are much less likely.