Idle Speed & Mixture
NOTE:
Idle mixture on fuel injected models is controlled by control module and is not adjustable. Controlled idle speed and IAC count can be checked using scan tool. See CONTROLLED IDLE SPEED & IAC COUNT table. For controlled idle speed adjustment procedures, see the ADJUSTMENTS - 7.4L
article.
CONTROLLED IDLE SPEED & IAC COUNT
| Application | Idle RPM | (1) IAC Counts | ||||||
|---|---|---|---|---|---|---|---|---|
| Auto. Trans. (2) | 575-625 | Varies | ||||||
| Man. Trans. (3) | 700-750 | Varies | ||||||
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