1. Introduction
This manual provides essential information for the proper installation, function, and maintenance of your Standard Motor Products 29885 Pro Series Ignition Wire Set. Please read this manual thoroughly before proceeding with installation or any related procedures to ensure safe and effective use.
2. Safety Information
- Always disconnect the vehicle's battery before performing any work on the ignition system to prevent electrical shock or damage to components.
- Allow the engine to cool completely before handling ignition components, as they can become very hot during operation.
- Wear appropriate personal protective equipment, including safety glasses and gloves, during installation.
- Refer to your vehicle's specific service manual for detailed instructions and torque specifications relevant to your make and model.
- Keep ignition wires away from moving engine parts and extreme heat sources to prevent damage.
3. Package Contents
The Standard Motor Products 29885 Pro Series Ignition Wire Set package typically includes:
- Standard Motor Products, Inc. - Ignition Wire (29885) - 1 set (quantity of individual wires may vary based on application)
4. Installation
Proper installation of ignition wires is crucial for optimal engine performance and longevity. Follow these general steps, always consulting your vehicle's service manual for specific procedures.
- Preparation: Ensure the engine is cool and the vehicle's battery is disconnected. Identify the firing order of your engine.
- One-by-One Replacement: To avoid mixing up wire connections, replace one ignition wire at a time. Start by removing one old wire from the spark plug and then from the distributor cap or coil pack.
- Matching Lengths: Select a new wire from the set that matches the length and boot configuration of the old wire you just removed.
- Connection: Firmly push the new wire onto the spark plug until you feel a positive click, indicating it is fully seated. Connect the other end to the corresponding terminal on the distributor cap or coil pack, ensuring a secure fit.
- Routing: Route the new wire exactly as the original was routed, utilizing any wire separators or clips to prevent contact with hot engine components or moving parts. Proper routing prevents chafing and ensures optimal performance.
- Repeat: Continue this process for all remaining ignition wires.
- Final Check: Once all wires are installed, double-check all connections for security and proper routing. Reconnect the battery.

An individual ignition wire from the Standard Motor Products 29885 Pro Series, featuring a 7mm high-temperature silicone jacket and conductive silicone core. One end has a straight boot, and the other has a metal terminal.
5. Operating Principle
Ignition wires, also known as spark plug wires, are critical components of a vehicle's ignition system. Their primary function is to transfer high voltage from the ignition coil (or distributor/coil pack) to the spark plugs. This high voltage creates a spark at the spark plug gap, igniting the air-fuel mixture in the engine's combustion chamber. The Pro Series wires are designed with a 7mm high-temperature silicone jacket and a conductive silicone core to ensure efficient voltage transfer and durability under demanding engine conditions.
6. Maintenance
Ignition wires are wear items and should be inspected periodically. While the Pro Series wires are designed for durability, regular checks can help identify potential issues before they lead to performance problems.
- Visual Inspection: Periodically inspect the wires for cracks, fraying, burns, or any signs of physical damage to the insulation. Check the boots for tears or deterioration.
- Connection Security: Ensure all wire connections at the spark plugs and distributor/coil pack are secure and free from corrosion.
- Cleanliness: Keep the wires clean and free from oil, grease, and dirt, which can degrade the insulation over time.
- Routing: Verify that wires remain properly routed and are not touching hot exhaust components or moving parts.
7. Troubleshooting
If your vehicle experiences ignition-related issues after installation or during use, consider the following common troubleshooting steps:
- Engine Misfire/Rough Idle: This is a common symptom of a faulty or improperly connected ignition wire. Re-check all connections and inspect wires for damage.
- Reduced Fuel Economy: Damaged wires can lead to incomplete combustion, affecting fuel efficiency.
- Check Engine Light: A misfire detected by the engine control unit (ECU) can trigger the check engine light. Diagnostic trouble codes (DTCs) can help pinpoint the cylinder with the issue.
- Visible Arcing: In a dark environment, you might observe sparks jumping from a damaged wire to a metal component, indicating a high-voltage leak.
- Resistance Test: If you suspect a faulty wire, you can test its resistance using a multimeter. Consult your vehicle's service manual for expected resistance values.
If issues persist, it is recommended to consult a qualified automotive technician.
8. Specifications
| Specification | Detail |
|---|---|
| Brand | Standard Motor Products |
| Model Number | 29885 |
| Product Type | Auto Part (Ignition Wire Set) |
| Material | Silicone (High Temperature, Conductive Silicone Core, Silicone Jacket) |
| Item Dimensions (L x W x H) | 7.45 x 4.63 x 9.7 inches |
| Item Weight | 1.21 pounds |
| UPC | 091769646387 |
| Country Of Origin | Mexico |
9. Warranty Information
Warranty coverage for the Standard Motor Products 29885 Pro Series Ignition Wire Set is provided by the manufacturer. Please refer to the warranty documentation included with your purchase or contact Standard Motor Products directly for specific terms and conditions. Proof of purchase may be required for warranty claims.
10. Support
For technical assistance, product inquiries, or support regarding your Standard Motor Products 29885 Pro Series Ignition Wire Set, please contact Standard Motor Products customer service or the retailer from whom the product was purchased. Have your product model number and purchase details ready when contacting support.