Choosing the Right Spark Plug Wire Set for Your 1980-1983 Dodge Mirada
Get your classic Mirada's ignition firing perfectly with the right set of new wires.
- You MUST verify your Mirada's engine (3.7L Slant-6, 5.2L V8, or 5.9L V8) before buying a wire set.
- Modern aftermarket wires from brands like NGK, Denso, MSD, and Taylor are a significant upgrade over 1980s technology.
- For a stock engine, a quality OEM-style set from NGK, Denso, or Standard is a reliable and cost-effective choice.
- Replace wires one at a time to ensure the firing order remains correct.
Is it Time for New Wires?
The original spark plug wires on your Mirada have likely been replaced many times. Wires wear out from engine heat and vibration. Over time, the insulation cracks and the electrical connection weakens. If you're experiencing a rough idle, poor acceleration, or bad gas mileage, your spark plug wires could be the culprit. Since there are no specific recalls or technical service bulletins (TSBs) for this part on the Mirada, failure is typically due to age and normal wear.
Don't Ignore Bad Wires
Old, cracked wires can arc against metal engine parts, causing a cylinder to misfire. This wastes gas and can, over time, damage your catalytic converter with unburnt fuel. It's a simple fix that prevents bigger problems.
Choosing Your New Aftermarket Wire Set
Finding original Mopar wires for a car from the early '80s is nearly impossible. The good news is that modern aftermarket wires are often better than what was available when your Mirada was new. They use more durable materials and have better electrical designs.
Step 1: Match the Engine
This is the most important step. The Dodge Mirada came with three different engines, and each one needs a specific wire set. Make sure you know which engine you have before you order.
- 3.7L (225 ci) Slant-6: An inline six-cylinder engine.
- 5.2L (318 ci) V8: The most common V8 option.
- 5.9L (360 ci) V8: A less common, more powerful V8 offered only in 1980.
Step 2: Pick a Brand Tier
Not all wire sets are created equal. They generally fall into three categories based on quality and intended use.
Performance Wires (MSD, Taylor Cable, Granatelli, Accel)
These brands are popular in the classic Mopar community for modified cars. They often feature thicker 8mm or 8.5mm silicone jackets for better heat resistance and lower electrical resistance for a hotter spark. If you have upgraded your ignition coil or have an aftermarket intake and headers, a set from MSD or Taylor is a great choice. For a stock engine, they work perfectly fine but might be overkill.
OEM-Style Quality (NGK, Denso, Standard 'Blue Streak')
Brands like NGK and Denso are famous for their quality and are a top choice for daily drivers and stock restorations. They provide excellent reliability and a long service life. Standard Motor Products (SMP) is another trusted name that makes direct-fit replacement parts that meet or exceed original specs. These are excellent, no-worry choices for a stock or lightly modified Mirada.
Standard Replacement (Standard Wires, Walker Products)
These brands offer a direct replacement for your old wires at a budget-friendly price. They are designed to meet factory requirements and will get your car running properly. For a stock daily driver, a standard set is often all you need.
What About Wire Diameter?
Original wires were 7mm. Many aftermarket sets are 8mm or 8.5mm. The extra thickness provides better insulation against heat and electrical interference. For a stock Mirada, 7mm or 8mm is perfectly fine. If you have a high-output ignition system, the 8.5mm wires are a good idea.
Cost of a New Spark Plug Wire Set (1980-1983 Dodge Mirada)
| Quality Tier | Price Range | Best For |
|---|---|---|
| Standard Replacement | $25 - $50 | Stock vehicles, budget repairs |
| OEM-Style Quality | $45 - $90 | Stock or lightly modified daily drivers |
| Performance | $80 - $145 | Modified engines, high-performance ignition systems |
Frequently Asked Questions (FAQ)
Do I need special tools to change my spark plug wires?
No, you don't need special tools. A pair of spark plug wire pliers can make it easier to pull the boots off without damaging them, but you can usually do it by hand. The most important rule is to twist the boot to break the seal before pulling it off. Never pull on the wire itself.
Can I replace just one bad wire?
You can, but it's not recommended. Spark plug wires are sold in sets for a reason. They all have the same age and have been exposed to the same conditions. If one has failed, the others are likely not far behind. Replacing them as a set ensures consistent performance.
What is dielectric grease and should I use it?
Dielectric grease is a non-conductive silicone grease that you apply to the inside of the spark plug wire boots. It helps seal out moisture and dirt, prevents the boots from getting stuck on the plugs and distributor cap, and makes them easier to remove next time. Most quality wire sets include a small packet.
What's the trick to not mixing up the wires?
The easiest way is to replace one wire at a time. Remove the longest wire, find the longest wire in your new set, and install it. Then move to the next-longest wire. This keeps you from crossing wires, which would cause the engine to run poorly or not at all.
Technical Specifications
Original equipment part numbers are obsolete. Key specifications when shopping for aftermarket wires include your engine size (3.7L, 5.2L, or 5.9L), wire core type (spiral-wound is preferred), and diameter (typically 7mm or 8mm for stock applications).
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Dodge Mirada: