Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1991 Ford Explorer 4D Utility, 4WD, StandardFACTORY OEM SERVICE PROCEDURE
Engine/VIN Id: Application
1990 MODEL COVERAGE
| MODEL | ENGINE | ENGINE ID | FUEL SYSTEM | IGNITION SYSTEM |
|---|---|---|---|---|
| Aerostar | 3.0L | U | PFI | TFI-IV |
| Aerostar | 4.0L | X | PFI MA | EDIS |
| Bronco | 4.9L | Y | PFI | TFI-IV |
| Bronco | 5.0L | N | PFI | TFI-IV |
| Bronco | 5.8L | H | PFI | TFI-IV |
| Bronco II | 2.9L | T | PFI MA | EDIS |
| "E" Series Van (E150/250/350) | 4.9L | Y | PFI | TFI-IV |
| "E" Series Van (E150/250/350) | 5.0L | N | PFI | TFI-IV |
| "E" Series Van (E150/250/350) | 5.8L | H | PFI | TFI-IV |
| "E" Series Van (E150/250/350) | 7.3L | M | Diesel | N/A |
| "E" Series Van (E150/250/350) | 7.5L | G | PFI | TFI-IV |
| "F" Series Pickup (F150/250/350) | 4.9L | Y | PFI | TFI-IV |
| "F" Series Pickup (F150/250/350) | 5.0L | N | PFI | TFI-IV |
| "F" Series Pickup (F150/250/350) | 5.8L | H | PFI | TFI-IV |
| "F" Series Pickup (F150/250/350) | 7.3L | M | Diesel | N/A |
| "F" Series Pickup (F150/250/350) | 7.5L | G | PFI | TFI-IV |
| Ranger | 2.3L | A | PFI | DIS |
| Ranger | 2.9L | T | PFI MA | TFI-IV |
| Ranger | 4.0L | X | PFI MA | EDIS |
1991 MODEL COVERAGE
| MODEL | ENGINE | ENGINE ID | FUEL SYSTEM | IGNITION SYSTEM | ||
|---|---|---|---|---|---|---|
| Aerostar | 3.0L | U | PFI | TFI-IV | ||
| Aerostar | 4.0L | X | PFI MA | EDIS | ||
| Bronco | 4.9L | Y | PFI | TFI-IV | ||
| Bronco | 5.0L | N | PFI | TFI-IV | ||
| Bronco | 5.8L | H | PFI | TFI-IV | ||
| "E" Series Van (E150/250/350) | 4.9L | Y | PFI | TFI-IV | ||
| "E" Series Van (E150/250/350) | 5.0L | N | PFI | TFI-IV | ||
| "E" Series Van (E150/250/350) | 5.8L | H | PFI | TFI-IV | ||
| "E" Series Van (E150/250/350) | 7.3L (1) | M | Diesel | N/A | ||
| "E" Series Van (E150/250/350) | 7.5L | G | PFI | TFI-IV | ||
| Explorer | 4.0L | X | PFI MA | EDIS | ||
| "F" Series Pickup (F150/250/350) | 4.9L | Y | PFI | TFI-IV | ||
| "F" Series Pickup (F150/250/350) | 5.0L | N | PFI | TFI-IV | ||
| "F" Series Pickup (F150/250/350) | 5.8L | H | PFI | TFI-IV | ||
| "F" Series Pickup (F150/250/350) | 7.3L(1) | M | Diesel | N/A | ||
| "F" Series Pickup (F150/250/350) | 7.5L | G | PFI | TFI-IV | ||
| Ranger | 2.3L | A | PFI | DIS | ||
| Ranger | 2.9L | T | PFI MA | TFI-IV | ||
| Ranger | 3.0L | U | PFI MA | TFI-IV | ||
| Ranger | 4.0L | X | PFI MA | EDIS | ||
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Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.