September 30: LEMON manuals is back up on a temporary server! Slowness is possible
Idle Speed & Mixture
NOTE:
Idle mixture on fuel injected models is controlled by the 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 |
IAC Counts |
| 2.5L TBI |
| "S" Series |
| Auto. Trans. |
800 |
15-40 |
| Man. Trans. |
900 |
5-20 |
| 2.8L TBI |
| "S" Series |
| Auto. Trans. |
800 |
5-20 |
| 3.1L TBI |
| "U" Series |
| Auto. Trans. |
600-700 |
5-15 |
| 3.8L PFI |
| "U" Series |
| Auto. Trans. |
650-750 |
16-20 |
| 4.3L CPI |
| "L" Series |
| Auto. Trans. |
625 |
15-50 |
| "M", "S" & "T" Series |
| Auto. Trans. |
550 |
5-40 |
| 4.3L PFI Turbo |
| "S" & "T" Series |
| Auto. Trans. |
|
1-50 |
| 4.3L TBI |
| "C" & "K" Series |
| Auto. Trans. |
537 |
5-30 |
| Auto. Trans. |
650 |
20-35 |
| Man. Trans. |
550 |
2-20 |
| "G" Series |
| Auto. Trans. |
538 |
5-30 |
| Man. Trans. |
650 |
5-30 |
| "L" Series |
| Auto. Trans. |
625 |
5-50 |
| Man. Trans. |
600 |
3-30 |
| "M" Series |
| Auto. Trans. |
538 |
5-30 |
| "P" Series |
| Auto. Trans. |
650 |
20-35 |
| 5.0L TBI |
| "C" & "K" Series |
| Auto. Trans. |
500 |
5-30 |
| Man. Trans. |
600 |
5-30 |
| 5.7L TBI |
| "C", "G", "K" & "P" Series |
| Under 8500 GVW |
| Auto. Trans. |
550 |
5-30 |
| Man. Trans. |
660 |
5-30 |
| Over 8500 GVW |
| Auto. Trans. |
550 |
5-30 |
| Man. Trans. |
600 |
5-30 |
| 7.4L TBI |
| "C", "G", "K" & "P" Series |
| Auto. Trans. |
750 |
5-30 |
| Man. Trans. |
800 |
5-30 |