Here's a breakdown of what's involved, assuming you're replacing a worn-out or damaged throttle pedal assembly:
1. Safety First:
* Disconnect the battery's negative terminal. This prevents accidental shorts and electrical damage.
* Consult a repair manual. A factory service manual for your specific 1987 Buick Regal is invaluable. It will provide detailed diagrams and instructions specific to your vehicle. Haynes and Chilton manuals are readily available online and in auto parts stores.
2. Accessing the Throttle Pedal:
* Locate the throttle pedal assembly. This is usually located under the dashboard, near the driver's feet. You'll likely need to remove the lower dashboard panels or trim to access it. The repair manual will guide you on this.
* Take photos. Before disconnecting anything, take detailed photos of the existing assembly and its connections. This is crucial for reassembly.
3. Removal of the Old Pedal:
* Disconnect the throttle cable. There's usually a retaining clip or screw holding the cable to the pedal. Loosen it carefully.
* Disconnect any electrical connectors. Some models have sensors connected to the pedal (for cruise control or other electronic systems). Note their locations and carefully disconnect them.
* Remove the mounting bolts or fasteners. The pedal assembly is typically secured with bolts or screws. Remove these, carefully noting their location and any washers or spacers.
* Remove the old pedal assembly. Once all fasteners are removed, the pedal assembly should come out.
4. Installation of the New Pedal:
* Compare the new pedal to the old one. Ensure they are identical or compatible.
* Install the new pedal assembly. Reverse the removal process. Pay close attention to the order of washers and spacers.
* Reconnect the throttle cable. Make sure it's properly seated and secured.
* Reconnect any electrical connectors. Ensure they are securely plugged in.
* Reinstall the dashboard panels and trim.
5. Testing:
* Reconnect the battery's negative terminal.
* Start the engine. Check for proper throttle response. The engine should idle smoothly, and the throttle should respond smoothly to pedal input.
* Test the cruise control (if equipped). Make sure it functions correctly.
Important Considerations:
* Aftermarket Pedals: If installing an aftermarket performance pedal, ensure it's compatible with your vehicle and that you have all the necessary hardware.
* Throttle Cable Adjustment: After installing a new pedal, you might need to adjust the throttle cable to ensure proper operation. Your repair manual will detail how to do this. Incorrect adjustment can lead to poor engine performance or even damage.
* Sensor Calibration: Some electronic throttle control systems require sensor calibration after replacing the pedal. Consult your repair manual or a qualified mechanic for assistance.
If you're not comfortable performing this repair yourself, take your Buick to a qualified mechanic. Improper installation of the throttle pedal can lead to serious driving issues and safety hazards. It's better to be safe than sorry.
