ENA ENASP110506
ENA Spark Plug Instruction Manual
Model: ENASP110506 | Part Number: SP413 AGSF32N
Introduction
This manual provides essential information for the installation, operation, and maintenance of your ENA Spark Plugs. Please read this manual thoroughly before installation to ensure proper function and longevity of the product.
ENA Spark Plugs are engineered for reliable ignition and optimal engine performance, compatible with a wide range of Ford, Lincoln, Mercury, and Merkur vehicles.
Product Overview
ENA Spark Plugs Set

This image displays a set of six ENA Spark Plugs along with their individual packaging boxes. The spark plugs feature a white ceramic insulator and a metallic threaded body, indicating a standard design for automotive applications.
Key Features of ENA Spark Plugs

This diagram illustrates the primary features of an ENA Spark Plug: Isostatic Ceramic Insulators for reliable spark delivery, a Perfectly Precise Gap for optimized ignition, a Terminal Screw Cap for voltage stability, and Debris-Free Threads for precise connection.
Specifications
The following table details the technical specifications of the ENA Spark Plugs (Model: ENASP110506).
| Attribute | Value |
|---|---|
| Brand | ENA |
| Model Number | ENASP110506 |
| Reference Numbers | SP413, AGSF32N, BP5EFS, BPR5EFS, FW-SP6018 |
| Core Material | Iridium |
| Gap Size (Pre-Gapped) | 0.060 inches (0.6 Millimeters) |
| Hex Size | 0.63 inches |
| Thread Diameter | 14.00 mm |
| Insulator Height | 53.00 mm (2.08 inches) |
| Total Length | 76 mm (2.99 inches) |
| Item Weight (per set) | 11.2 ounces |
| Package Dimensions | 7 x 4 x 3 inches |
| Vehicle Service Type | Car |
| Automotive Fit Type | Vehicle Specific Fit |
Note: The spark plugs are pre-gapped for convenience. Always verify compatibility with your specific vehicle model and year before installation.

This image provides a visual representation of the spark plug's dimensions, including its total length (76mm / 2.99") and insulator height (53mm / 2.08"), along with the thread size (M14X1.25-6e).
Vehicle Fitment
ENA Spark Plugs (SP413 AGSF32N) are compatible with a range of vehicles. Please consult the table below to confirm compatibility with your specific vehicle's make, model, and engine size.

This image displays a comprehensive table listing compatible Ford, Mercury, Lincoln, and Merkur vehicle models, years, and engine types for the ENA Spark Plugs. It also reiterates the part numbers: SP413 AGSF32N BP5EFS BPR5EFS FW-SP6018.
Key Compatible Models and Years:
- Ford: F150 (2009-2010 4.6L V8), Crown Victoria (1995-2011 4.6L V8), Expedition (1997-2004 4.6L V8), Mustang (1999-2004 4.6L V8), Explorer (1996-2005, 5.0L V8 / 4.6L V8), Taurus (1988-2007 3.0L V6), Ranger (1991-2008 3.0L V6), E-Series Vans (various years 4.6L V8), Thunderbird (1996-1997 4.6L V8).
- Lincoln: Navigator (1999-2004 5.4L V8), Town Car (1998-2008 4.6L V8), Blackwood (2002 5.4L V8).
- Mercury: Grand Marquis (1995-2011 4.6L V8), Mountaineer (2002-2005 4.6L V8), Sable (1988-2005 3.0L V6).
- Merkur: XR4Ti (1988 2.3L L4).
Setup & Installation
Proper installation is crucial for the performance and longevity of your spark plugs. If you are unsure about any step, it is recommended to seek professional assistance.

This image provides a visual step-by-step guide for installing spark plugs, detailing the process from turning off the engine to reassembly and testing.
- Turn Off The Engine: Ensure the vehicle's engine is completely off and cool. Open the hood and locate the spark plugs, typically connected to ignition coils or wires.
- Remove Old Spark Plugs: Use a spark plug socket and extension to carefully loosen and remove each old spark plug from its socket. Note the condition of the old plugs as it can indicate engine health.
- Clean the Area: Before installing new plugs, carefully brush away any accumulated dust, dirt, or debris from around the spark plug wells and threads to prevent contamination of the combustion chamber.
- Install New Spark Plugs: Gently hand-thread the new ENA spark plugs into their respective sockets to avoid cross-threading. Once hand-tight, use a torque wrench to tighten them to the manufacturer's specified torque setting for your vehicle. Do not overtighten.
- Reassemble and Test: Reattach the ignition coils or wires to the new spark plugs. Secure any bolts or fasteners that were removed. Close the hood. Start the engine to verify proper operation and check for any misfires or unusual sounds.
Important Considerations:
- Always use the correct tools for spark plug removal and installation.
- Ensure the engine is cool before working on spark plugs to prevent damage to the cylinder head threads.
- Apply a small amount of anti-seize compound to the spark plug threads before installation, especially for aluminum cylinder heads.
Operating Principles
ENA Spark Plugs are designed to deliver consistent and powerful sparks for efficient combustion. Their construction ensures durability and optimal performance under various engine conditions.
Exceptional Ignitability

ENA Spark Plugs undergo Rigorous High-Temp Testing and utilize an Alumina Ceramic Insulator to ensure exceptional ignitability performance, contributing to a longer service life and improved fuel efficiency.
Internal Structure

This cross-section view reveals the internal components of an ENA Spark Plug: (1) Center Electrode, (2) Solid Copper Core, (3) High Alumina Ceramic insulator, and (4) Alloy Terminal. These components work in concert to deliver consistent ignition.
Maintenance
Regular inspection and timely replacement of spark plugs are vital for maintaining engine health and performance.
- Inspection: Periodically inspect your spark plugs for signs of wear, fouling, or damage. A healthy spark plug should have a light tan or grayish-white deposit on the firing tip.
- Replacement Interval: Refer to your vehicle's owner's manual for recommended spark plug replacement intervals. ENA Spark Plugs are designed for long service life, but adherence to manufacturer guidelines is recommended.
- Gap Check: While ENA spark plugs are pre-gapped, it is good practice to verify the gap with a feeler gauge before installation, especially if there is any concern about shipping damage.

This image shows four new spark plugs, ready for installation or inspection, emphasizing the importance of using clean, undamaged components for optimal engine function.
Troubleshooting
If you experience issues after spark plug installation, consider the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Engine Misfire / Rough Idling | Incorrectly gapped plug, loose connection, fouled plug, damaged ignition coil/wire. | Verify spark plug gap, ensure connections are secure, inspect for fouling, check ignition system components. |
| Reduced Fuel Economy | Worn or fouled spark plugs, incorrect gap. | Inspect and replace worn plugs, ensure correct gap. |
| Difficulty Starting Engine | Weak spark, fouled plugs, battery issues. | Check spark plug condition, test battery and charging system. |
| Check Engine Light (CEL) | Misfire detected by vehicle's computer. | Scan for diagnostic trouble codes (DTCs) to pinpoint the exact issue. |
If troubleshooting steps do not resolve the issue, it is advisable to consult a certified automotive technician.
Warranty & Support
ENA Spark Plugs come with a 12-Month Warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use.
For warranty claims, technical support, or any inquiries regarding your ENA product, please contact the seller or visit the official ENA store:
Please retain your proof of purchase for warranty validation.
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