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

2.2L SFI

Auto. Trans. ⁽²⁾

⁽³⁾

⁽⁴⁾ *

Man. Trans. ⁽³⁾

⁽⁴⁾

⁽⁴⁾ *

4.3L CSI

Auto. Trans. ⁽²⁾

650

5-30

Man. Trans.

Pickup

725

5-30

Utility

700

5-30

⁽¹⁾	Add 2 counts for engines with less than 500 miles. On 4.3L, add 2 counts for every 1000 ft. above sea level.

⁽²⁾	Automatic transmission in Drive.

⁽³⁾	Manual transmission in Neutral. Tech 1 scan tester will display "RDL" with transmission in Neutral.

⁽⁴⁾	Information not available.