Autolite 386 Spark Plug

Autolite 386 Copper Resistor Spark Plug

Autolite 386 is a copper resistor spark plug built for quick starts, steady ignition performance, and smooth acceleration. It follows OE form, fit, and function standards for a wide range of foreign and domestic vehicles, making it a practical replacement for routine ignition service.

For drivers searching for an OE-style spark plug for Honda Civic, Toyota Corolla, or Ford F-150 maintenance, Autolite 386 offers a straightforward service part with a copper center electrode, nickel tip materials, and a resistor design for reduced electrical noise.

Key Features

• Copper center electrode for reliable ignition response
• Resistor type spark plug with 5,000 ohm resistance
• Nickel center and ground electrode tip materials
• Tapered ground electrode tip design
• Flat seat design with 13/16 in. hex size
• 0.500 in. reach and 18.0 mm thread diameter
• Ceramic insulator with short insulator type
• Pre-gapped at 0.025 in. / 0.60 mm

Product Details

Autolite Copper Resistor Spark Plug 386 is part of the Autolite copper spark plug line, which focuses on OE-style replacement fitment and dependable ignition service across many makes and models. The copper core supports consistent spark delivery, while the resistor construction helps reduce radio-frequency interference in the ignition system. This makes Autolite 386 a solid choice for routine tune-up work on vehicles that call for a standard copper plug.

This part cross-references AP Exhaust 7 and FEL-PRO 1010 for the same application. It is commonly searched as a replacement spark plug for Honda Civic, Toyota Corolla, and Ford F-150 service needs, and the Autolite 386 part number is often used when matching OE-style ignition specifications.

Common Issues It May Address

• Hard starting caused by worn spark plugs
• Rough idle from weak or inconsistent spark
• Reduced throttle response during acceleration
• Misfire symptoms related to aged ignition components
• Radio-frequency interference in resistor-equipped ignition systems

Installation Notes

Verify thread diameter, reach, seat type, and pre-gap before installation. Use the specified torque for the engine application and inspect ignition wires or coils at the same time to avoid repeat service. Confirm the vehicle’s required plug specification before installing Autolite 386, especially on Honda Civic, Toyota Corolla, and Ford F-150 applications where OE-equivalent dimensions matter.

Quality Assurance

Autolite supplies ignition products to the automotive aftermarket and original equipment manufacturers, with a focus on OE-style form, fit, and function. Autolite 386 is manufactured to meet standard spark plug service requirements for everyday maintenance and replacement.