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.
1990 Ford Probe LX, AutomaticFACTORY OEM SERVICE PROCEDURE
Manifold Absolute Pressure (Map) Sensor Specifications
MAP/BP SENSOR SPECIFICATIONS
| Barometric Pressure In. Hg | Frequency Hz |
|---|---|
| 17.1 | 122.4 |
| 18.3 | 125.5 |
| 19.5 | 128.7 |
| 20.7 | 131.9 |
| 21.8 | 135.1 |
| 23.0 | 138.3 |
| 24.2 | 141.8 |
| 25.4 | 145.4 |
| 26.6 | 148.9 |
| 27.7 | 152.5 |
| 28.9 | 156.1 |
| 30.1 | 159.6 |
| 31.0 | 162.4 |
MAP SENSOR SPECIFICATIONS
| Manifold Vacuum In. Hg | Frequency Hz |
|---|---|
| 0 | 159 |
| 3 | 150 |
| 6 | 141 |
| 9 | 133 |
| 12 | 125 |
| 15 | 117 |
| 18 | 109 |
| 21 | 102 |
| 24 | 95 |
| 27 | 88 |
| 30 | 80 |
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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