Autolite 3924DP Spark Plug

Overview of Autolite Copper Resistor Spark Plug 3924DP

The Autolite Copper Resistor Spark Plug 3924DP is engineered to deliver reliable ignition performance for a wide range of vehicles including Acura, BMW, Ford, Honda, Toyota, and Volkswagen models. Designed with a copper core and resistor technology, this spark plug supports efficient combustion and reduces electrical interference.

• Resistor type spark plug with 4000 ohms resistance for noise suppression
• Copper center electrode core with nickel tip for optimal conductivity and durability
• Tapered ground electrode tip made of nickel for consistent spark delivery
• Mid-projection ceramic insulator for improved heat dissipation
• Flat seat type with 14mm thread diameter and 0.75 inch reach
• Pre-gapped to 0.044 inches (1.10 mm) for precise ignition timing
• Hex size 5/8 inch (16 mm) for standard installation tools
• Electrical terminal type: stud for secure connection

Detailed Product Description

The Autolite Copper Resistor Spark Plug - Display Pack (part number 3924DP) features a copper core center electrode that enhances thermal conductivity, promoting efficient heat transfer and reducing fouling. The nickel-plated center and ground electrode tips provide corrosion resistance and durability under high combustion temperatures. The tapered ground electrode tip design ensures a stable and consistent spark, which is critical for smooth engine operation. The mid-projection ceramic insulator improves voltage insulation and heat management, helping maintain optimal engine performance across various driving conditions.

This spark plug is designed with a resistor type to minimize electromagnetic interference that can affect vehicle electronics and radio signals. The flat seat design and 14mm thread diameter with a 0.75 inch reach make it compatible with many popular models from Acura, BMW, Ford, Honda, Toyota, and Volkswagen, among others. The pre-gap size of 0.044 inches (1.10 mm) is factory set to meet manufacturer specifications, ensuring proper ignition timing and combustion efficiency.

Compatible Vehicles and Applications

This Autolite spark plug 3924DP is compatible with a broad range of vehicles, including but not limited to:

• Acura Integra and TL
• BMW 3 Series (325i, 328i, 330i)
• Ford Taurus and Ranger
• Honda Civic and Accord
• Toyota Camry and Corolla
• Volkswagen Jetta and Passat

It is suitable for secondary ignition systems requiring a resistor spark plug with these specifications.

Common Issues Addressed by This Spark Plug

• Engine misfires caused by worn or fouled spark plugs
• Radio frequency interference affecting vehicle electronics
• Poor fuel economy due to inefficient combustion
• Hard starting or rough idling conditions
• Reduced engine power and acceleration

Installation Notes and Tips

Before installation, verify the spark plug gap is set to 0.044 inches (1.10 mm) as specified. Use a 5/8 inch (16 mm) socket wrench for removal and installation. Torque the spark plug to the vehicle manufacturer’s recommended specifications to avoid damage to the threads or improper sealing. Ensure the electrical terminal stud is properly connected to maintain a secure ignition circuit.

Quality Assurance and Warranty

Autolite spark plugs are manufactured to meet OEM standards for fit, form, and function. The Copper Resistor Spark Plug - Display Pack undergoes rigorous quality control to ensure consistent performance and durability. While specific warranty details are not provided, Autolite products typically come with a limited warranty against manufacturing defects. Consult vehicle and product documentation for further warranty information.