A Guide to Spark Plug Wire Sets for the 1985-1995 Mitsubishi Galant
Keep your Galant's engine running smoothly by choosing the right spark plug wire set.
- For best results, choose an OEM-equivalent brand like NGK or Denso.
- You must verify your Galant's specific engine (4-cyl, V6, SOHC, DOHC) to get the correct wire set.
- The most common installation mistake is mixing up the firing order; prevent this by replacing wires one at a time.
- It is highly recommended to replace the spark plugs at the same time as the wires.
Signs of Failing Spark Plug Wires
When spark plug wires start to wear out, the flow of electricity to your spark plugs becomes less reliable. This can cause a variety of noticeable engine problems. Because these wires are exposed to extreme heat and vibration, they will naturally degrade over time.
- Rough Idling: The engine may shake or vibrate more than usual when the car is stopped.
- Engine Misfires: You might feel a hesitation or stumble from the engine, especially during acceleration. A check engine light may also appear.
- Difficulty Starting: The engine may take longer to crank before it starts, or it might not start at all.
- Poor Acceleration: The car may feel sluggish and less powerful than normal.
- Reduced Fuel Economy: If the engine isn't running efficiently due to weak spark, it may use more fuel.
Critical Check: Match the Wires to Your Engine
The 1985-1995 Galant was available with several different engines (4-cylinder, V6, SOHC, DOHC, Turbo). Each engine requires a specific wire set with the correct number of wires and lengths. Using the wrong set will result in poor fitment and engine problems. Always verify your Galant's specific engine before ordering.
Choosing the Right Aftermarket Spark Plug Wires
For a vehicle like the 1985-1995 Galant, aftermarket parts are plentiful. Quality can vary, so it's important to choose a brand known for reliability. OEM Mitsubishi wires are likely discontinued or very hard to find, but several aftermarket brands meet or exceed original quality.
Tier 1: OEM-Equivalent Brands
These brands are known to be original equipment suppliers for many Japanese automakers, including Mitsubishi. For a stock Galant, they are the most recommended choice for reliability and proper fit.
- NGK: Often considered the top choice for Japanese vehicles. NGK wires are engineered for durability and excellent electrical conductivity.
- Denso: Another top-tier OEM supplier. Denso wires are known for their quality construction and reliable performance in daily driving scenarios.
Tier 2: Performance Brands
These brands focus on maximizing ignition energy, often for modified vehicles.
- Granatelli: Granatelli markets wires with near-zero resistance, claiming horsepower gains. These are for enthusiasts who may be running higher-performance ignition systems. For a standard daily driver, the benefits may not be noticeable.
Tier 3: Standard Aftermarket Brands
These brands offer a balance of affordability and function. They are a good option for budget-conscious repairs.
- Standard (Standard Motor Products): A well-known aftermarket brand that produces reliable replacement parts.
- Walker Products: Offers functional, budget-friendly wire sets.
- Prenco: Another standard aftermarket option available from various retailers.
Installation Best Practice
To avoid mixing up the firing order, replace the spark plug wires one at a time. Remove the longest wire and replace it with the longest wire from the new set, then move to the next-longest, and so on. Make sure you feel and hear the 'click' when you press the new wire's boot onto the spark plug and distributor cap tower.
Cost of Spark Plug Wire Sets (1985-1995 Mitsubishi Galant)
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket | $22 - $80 |
| New OEM-Equivalent (NGK/Denso) | $55 - $80 |
| Shop Labor | $75 - $150 |
Frequently Asked Questions
Do I need to replace my spark plugs at the same time?
It is highly recommended. The spark plug wires must be removed to access the spark plugs, so replacing them at the same time saves you from doing the same job twice. Old plugs can also strain new wires.
What is the most common mistake when replacing spark plug wires?
The most common and critical mistake is mixing up the firing order. Each wire must connect the correct terminal on the distributor cap to the correct cylinder. Replacing them one by one is the safest way to avoid this.
How often should spark plug wires be replaced?
There is no strict interval, but they are generally inspected during spark plug changes (every 30,000 to 50,000 miles for standard plugs). They should be replaced if they show any signs of cracking, burning, melting, or if you are experiencing ignition problems.
Are expensive performance wires worth it for my stock Galant?
For a stock engine used for daily driving, probably not. OEM-equivalent brands like NGK and Denso are engineered specifically for your vehicle's ignition system and will provide excellent, reliable performance. Performance wires are better suited for highly modified engines.
Technical Specifications
OEM Part Numbers: SMW250506
Varies significantly based on engine type (4-cylinder, V6, SOHC, DOHC, Turbo). Sets will contain a different number of wires with specific lengths and boot angles. For example, the 4G63 engine uses OEM part number SMW250506. Always confirm fitment for your specific vehicle and engine.
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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.
- Mitsubishi Galant:
- 🛍️ Shop This Part
- Signs of Failing Spark Plug Wires
- Critical Check: Match the Wires to Your Engine
- Choosing the Right Aftermarket Spark Plug Wires
- Tier 1: OEM-Equivalent Brands
- Tier 2: Performance Brands
- Tier 3: Standard Aftermarket Brands
- Installation Best Practice
- Cost of Spark Plug Wire Sets (1985-1995 Mitsubishi Galant)
- Frequently Asked Questions
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