Idle Speed & Mixture

NOTE: Idle mixture on fuel injected models is controlled by Electronic Control Module (ECM) and is not adjustable. Controlled idle speed and IAC count can be checked using scan tester. See CONTROLLED IDLE SPEED & IAC COUNT table.

CONTROLLED IDLE SPEED & IAC COUNT

Application

Idle RPM

⁽¹⁾ IAC Counts

3.8L PFI A/T ⁽²⁾

650-750

16-20

⁽¹⁾	Add 2 counts for engines with less than 500 miles.

⁽²⁾	Automatic transmission in Drive.