How To Adjust Distributor Points

How to Adjust Distributor Points: A Comprehensive Guide

Adjusting your distributor points might seem daunting, but with the right knowledge and a methodical approach, it's a manageable task. This guide will walk you through the process, covering various aspects and helping you understand the importance of accurate distributor timing for optimal engine performance.

Understanding Distributor Points

Before diving into the adjustment process, it's crucial to understand what distributor points are and their role in your vehicle's ignition system. The distributor points are a crucial part of the ignition system in older vehicles (typically pre-electronic ignition systems). They act as a mechanical switch, opening and closing to create the high voltage needed to ignite the air-fuel mixture in your engine's cylinders. Accurate timing is essential for efficient combustion and optimal engine performance. Improperly adjusted points can lead to poor engine performance, misfires, and even engine damage.

What Happens When Points are Misaligned?

Several issues arise from improperly adjusted distributor points:

• Poor Engine Performance: Inaccurate timing affects combustion efficiency, resulting in reduced power, sluggish acceleration, and poor fuel economy.
• Misfires: Incorrect point gap can cause intermittent or consistent misfires, leading to rough idling and potentially engine damage.
• Hard Starting: Difficulty in starting the engine is a common symptom of misaligned points.
• Excessive Emissions: Inaccurate ignition timing can contribute to increased emissions, potentially failing an emissions test.

Tools and Preparation: Gathering What You Need

Before beginning the adjustment, gather the necessary tools:

• Feeler gauge: This is crucial for setting the correct point gap. You'll need one appropriate for your vehicle's specifications; consult your vehicle's repair manual.
• Distributor adjustment tool: Some distributors require a special tool for precise adjustment. Check your vehicle's manual.
• Wrench(es): You may need wrenches to access and secure the distributor.
• Screwdrivers: Depending on your vehicle's design, screwdrivers may be needed.
• Vehicle repair manual: Absolutely essential for your specific make and model. This will provide precise specifications and diagrams.
• Safety Glasses: Always protect your eyes when working on your vehicle.

The Adjustment Process: Step-by-Step Guide

The specific procedure varies depending on the vehicle, but the general steps are as follows:

Step 1: Accessing the Distributor

Locate the distributor. It's usually under the distributor cap, near the engine's center. Consult your repair manual for the exact location.

Step 2: Checking the Point Gap

Using the feeler gauge, check the gap between the points. The required gap is specific to your vehicle; refer to your repair manual for the exact specification. This is crucial for accurate timing.

Step 3: Adjusting the Point Gap

If the gap is incorrect, carefully adjust the point gap using the adjustment screw. This usually requires a small screwdriver. Make tiny adjustments and recheck frequently. Avoid over-tightening, as it can damage the points.

Step 4: Verifying Timing

After adjusting the point gap, verify the ignition timing. This is usually done using a timing light and the timing marks on your engine's crankshaft pulley or timing cover. Consult your vehicle's repair manual for detailed instructions on timing adjustment. This step might require additional tools and knowledge.

Maintaining Your Distributor Points

Regular maintenance is key to preventing issues. Check and adjust the point gap periodically, as recommended in your vehicle's repair manual. Also consider the condition of the points themselves; they might need replacement over time due to wear and tear.

When to Seek Professional Help

If you're uncomfortable working on your vehicle's ignition system, or if you're unsure about any step, it's best to seek professional help from a qualified mechanic. Improper adjustment can lead to significant damage.

This guide provides a general overview; always consult your vehicle's repair manual for specific instructions and specifications. Remember, safety first!