During our tests we have found that some engines were experiencing irregular idle, this may be due to an incorrectly adjusted IAC (Idle Air Control) valve.

In order to work on the IAC valve correctly, you must adjust the air passage screw located on the throttle body (Fig. 1) so that the valve has an opening from 23 to 25 % when the engine is at idle and warm, therefore the operation sequence needed to adjust the air passage screw correctly is the following:

  • Turn on the engine and let it warm up
  • Leave the engine at idle
  • Connect TEXA's diagnostic tool and check the value of the IAC valve on the Parameters page
  • Slowly adjust the adjusting valve on the throttle body (Fig. 2) with a screwdriver until the IAC valve assumes a value from 23 to 25 % as suggested
  • Perform a test drive and make sure the engine works properly.

WARNING: The makes and distinguishing signs of the vehicle manufacturers included in this document are only provided to inform the reader about the potential suitability of the said TEXA products to be used for the vehicles of the above-mentioned manufacturers. References to makes and models contained in this document are to be considered only as a rough guide.  

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