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.
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HOMESERVICE MANUALSFORD1991PROBE V6-182 3.0LREPAIR AND DIAGNOSISSTEERING AND SUSPENSIONSTEERINGDESCRIPTION AND OPERATIONVARIABLE ASSIST POWER STEERING (VAPS)
1991 Ford Probe V6-182 3.0L
Variable Assist Power Steering (VAPS)
1991 Ford Probe V6-182 3.0LSECTION Variable Assist Power Steering (VAPS)
Fig. 1 Electronic Power Steering System:
Fig. 2 Electronic Control Module:
The Variable Assist Power Steering System (VAPS) automatically adjusts power steering pressure to provide light steering effort during low speed operation and parking, and high steering effort during high speeds to provide for better road feel.
The VAPS system uses a steering angle sensor and vehicle speed sensor, Fig. 1, to provide the control unit with input information, the control unit then adjusts the solenoid valve according to the inputs.
The control unit is equipped with a slide switch, Fig. 2, enabling a selection of normal operation or a 10% lighter or harder steering effort.
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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.