Instead of adjusting the parking brake, you address poor performance by tackling the potential causes:
1. Low Brake Fluid: Check your brake fluid level in the master cylinder reservoir. Low fluid indicates a leak somewhere in the system, which needs to be fixed before addressing the parking brake.
2. Worn Brake Pads: Worn rear brake pads reduce the effectiveness of the parking brake. The rear pads are usually quite accessible, and you should inspect them for wear. Replacement is necessary if worn below the minimum thickness.
3. Sticking Calipers: A sticking caliper piston can prevent the parking brake from engaging properly. This requires a thorough inspection of the calipers for free movement and may need caliper servicing or replacement. Sometimes, a thorough cleaning and lubrication of the caliper slide pins can resolve this issue.
4. Cable Issues: While less common, the cable itself can become stretched or corroded, reducing its effectiveness. It's difficult to adjust this cable directly, and replacement is usually the solution if it's determined to be the problem. It would require carefully tracing the cable and replacing the faulty section.
5. Master Cylinder Issue: In rare cases, a problem within the master cylinder itself can affect the parking brake operation. This is more likely if you're also experiencing issues with the regular service brakes.
In summary: You don't "adjust" the Fiero's parking brake like you would on a car with a cable-actuated drum brake. If it's not working correctly, you need to diagnose and fix the underlying mechanical issues, such as worn pads, sticking calipers, or a problem with the brake hydraulics. This usually involves inspection, cleaning, lubrication, or parts replacement, potentially requiring professional mechanic assistance. Don't attempt any repairs without the proper knowledge and safety precautions.
