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.
Throttle Control Solenoid
All V8 engines with synchro-mesh transmissions are equipped with a Throttle Control Solenoid, which is controlled by a transmission-mounted switch, and provides a higher idle speed while in third or fourth gear to reduce exhaust gas dilution and misfiring on closed throttle deceleration. The Throttle Control Solenoid is adjusted as follows: Place shift lever in Neutral, start engine and disconnect solenoid connector wire. Disconnect relay single connector and plug into solenoid to energize. With throttle in hot idle position, adjust solenoid adjusting bolt to obtain a speed of 1100 RPM.
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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.