Gasoline Engines
Idle speed is controlled by Powertrain Control Module (PCM) and is not adjustable. If engine idle concerns are present, check for contaminated fuel, vacuum leaks and incorrect ignition timing. Ensure throttle bore, EGR system and PCV system are clean. If these are okay, check PCM for Diagnostic Trouble Codes (DTCs). See appropriate SELF-DIAGNOSTICS article. If no DTCs exist, go to appropriate TROUBLE SHOOTING - NO CODES article.
IDLE RPM SPECIFICATION
| Application |
RPM |
| Econoline |
| 4.2L |
750-850 |
| 4.6L |
680-830 |
| 5.4L |
| E150 |
750 |
| E250 Gasoline |
630-700 |
| E250 & E350 Super Duty CNG |
715-850 |
| 6.8L |
| Gasoline |
600-900 |
| LPG |
790-930 |
| 7.3L |
|
| Escape |
| 2.0L |
800-900 |
| 3.0L |
730-750 |
| Excursion |
| 5.4L |
650-760 |
| 6.8L |
800-950 |
| 7.3L |
|
| Expedition |
| 4.6L |
680-830 |
| 5.4L |
700-760 |
| Explorer & Mountaineer |
| 4.0L |
| OHV |
|
| SOHC |
670-750 |
| 5.0L |
700-750 |
| Explorer Sport |
| 4.0L |
| Gasoline |
760-880 |
| Flex-Fuel |
800-900 |
| Explorer Sport Trac |
| 4.0L |
| Gasoline |
760-880 |
| Flex-Fuel |
800-900 |
| Pickup |
| 4.2L |
750-850 |
| 4.6L |
680-830 |
| 5.4L |
| F150 Gasoline (Except Lightning) |
720 |
| F150 Gasoline (Lightning) |
700 |
| F150 CNG |
715-850 |
| F250/F350 Super Duty |
630-700 |
| 6.8L |
600-900 |
| 7.3L |
|
| Navigator |
690-710 |
| Ranger |
| 2.3L |
800-950 |
| 2.5L |
800-950 |
| 3.0L |
| A/T |
880-920 |
| M/T |
800-830 |
| Flex-Fuel |
880-920 |
| 4.0L |
800-1000 |
| Villager |
700-800 |
| Windstar |
700-730 |