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 MANUALSFORD1990RANGER 4WD L4-140 2.3L SOHCREPAIR AND DIAGNOSISCRUISE CONTROLTESTING AND INSPECTIONSYMPTOM RELATED DIAGNOSTIC PROCEDURESSPEED CONTROL OPERATION IS INTERMITTENT
1990 Ford Ranger 4WD L4-140 2.3L SOHC
Speed Control Operation Is Intermittent
1990 Ford Ranger 4WD L4-140 2.3L SOHCSECTION Speed Control Operation Is Intermittent
1. Verify condition. If intermittent occurs when cruising, proceed to step 2. If intermittent occurs when using control buttons to turning steering wheel proceed to step 4.
2. Ensure there is proper vacuum to servo. If satisfactory, proceed to step 3. If not satisfactory, service vacuum supply as needed.
3. Perform servo (throttle actuator) assembly test. If results are satisfactory, substitute known good amplifier. If not satisfactory, replace servo assembly.
4. Perform control switch and circuit test. If not satisfactory, replace horn pad assembly. Clean or service copper brushes and steering wheel ring.
2. Ensure there is proper vacuum to servo. If satisfactory, proceed to step 3. If not satisfactory, service vacuum supply as needed.
3. Perform servo (throttle actuator) assembly test. If results are satisfactory, substitute known good amplifier. If not satisfactory, replace servo assembly.
4. Perform control switch and circuit test. If not satisfactory, replace horn pad assembly. Clean or service copper brushes and steering wheel ring.
RENDER: 1.0x
NO RELATED
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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.