Choosing the Right Spark Plugs for Your 1978-1995 Dodge Colt
Keep your classic Colt running smoothly with the correct new aftermarket spark plugs.
- Replacing spark plugs is a simple, low-cost maintenance item that can fix rough idle, poor acceleration, and bad gas mileage.
- The Dodge Colt is a rebadged Mitsubishi, so choosing Japanese brands like NGK or Denso is a smart choice for quality and fit.
- Always replace spark plugs as a full set of four and check the gap before installation.
- Standard copper plugs work great and are cost-effective; expensive iridium plugs are not a necessary upgrade for a stock engine.
Signs of Failing Spark Plugs in Your Colt
Worn-out spark plugs can cause a number of noticeable problems. Because the 1978-1995 Dodge Colt spans several generations of engine technology, symptoms can vary slightly. Early models won't have check engine lights, while the very latest might.
- Rough Idle: The engine may shake or vibrate more than usual when you're stopped.
- Poor Acceleration: You might feel like the car is hesitating or struggling to gain speed.
- Reduced Fuel Economy: If you're filling up the gas tank more often, bad plugs could be the cause.
- Engine Misfires: The engine may stumble or lose power for a moment. On later models (roughly 1994-1995), this could trigger a check engine light.
- Difficulty Starting: A weak or inconsistent spark can make it hard for the engine to turn over, especially when cold.
Choosing the Right Aftermarket Spark Plug
For a vehicle like the 1978-1995 Dodge Colt, aftermarket spark plugs are the most common and practical choice. The original parts are likely discontinued, and modern aftermarket brands offer excellent quality that often meets or exceeds the original specifications. The Dodge Colt was built by Mitsubishi, so it's wise to trust brands known for their quality in Japanese engines.
OEM was likely NGK or Denso
Since the Colt is a rebadged Mitsubishi Mirage, 🎬 See how to inspect and replace spark plugs on a Mirage the original factory spark plugs were most likely made by NGK or Denso. Choosing these brands for your replacement is a safe bet for reliable performance.
Spark Plug Brand Tiers for Your Dodge Colt
Your Colt's original engine was designed for simple, reliable copper spark plugs. While modern platinum and iridium plugs are available, they are not always a necessary upgrade for a stock engine and may be a waste of money. However, they do offer a longer service life.
- Tier 1: OEM-Equivalent Quality (Recommended)
These brands are known to be original equipment suppliers for many Japanese vehicles and offer outstanding reliability. You cannot go wrong choosing a plug from this tier.- NGK: Often considered the gold standard for Japanese engines. Their standard copper plugs (like the V-Power series) or G-Power platinum plugs are excellent choices.
- Denso: Another top-tier Japanese brand with a reputation for quality and durability, often installed at the factory in Japanese cars.
- Tier 2: Reliable & Reputable Brands
These are well-known American and European brands that produce quality plugs suitable for your Colt. They are a solid choice if NGK or Denso are not available.- Bosch: A German brand known for quality engineering. Their standard copper or platinum plugs are a good fit.
- Autolite: A popular American brand offering reliable performance and good value.
- Champion: Another trusted American brand with a long history of making dependable spark plugs.
- Tier 3: Performance & Economy Brands
This tier includes specialty brands and budget-focused options.- Accel & MSD: These brands are geared more towards high-performance and racing applications. They are quality products but may be unnecessary for a stock daily-driven Colt.
- Skyward: This brand represents a budget-friendly option for those needing a basic, functional replacement to get back on the road.
Cost of New Aftermarket Spark Plugs (1978-1995 Dodge Colt)
| Category | Price Range (Per Plug) |
|---|---|
| Economy/Standard Copper (e.g., Skyward, some Autolite/Champion) | $2.60 - $5.00 |
| OEM-Quality Copper/Platinum (e.g., NGK, Denso, Bosch) | $4.00 - $12.00 |
| Long-Life Iridium (e.g., NGK Iridium IX, Denso Iridium) | $10.00 - $21.37 |
Note: Prices are estimates per spark plug and can vary based on the specific plug type (copper, platinum, iridium) and brand. Your Colt has a 4-cylinder engine, so you will need to purchase four plugs.
Frequently Asked Questions (FAQ)
How often should I change the spark plugs on my Dodge Colt?
For standard copper plugs, which were original to these vehicles, a good interval is every 30,000 miles. If you upgrade to platinum or iridium plugs, you can extend that interval to 60,000 miles or more, but always check for signs of wear.
Do I need to check the 'gap' on my new spark plugs?
Yes. Even if plugs are advertised as 'pre-gapped,' you should always verify the gap with a feeler gauge or gapping tool before installation. 🎬 Watch this guide on how to gap a spark plug The correct gap is crucial for a strong spark and efficient combustion. Check your vehicle's repair manual or the under-hood emissions sticker for the correct specification.
Should I use copper, platinum, or iridium plugs in my Colt?
Your Colt's ignition system was designed for standard copper plugs, and they will provide excellent performance. Platinum and iridium plugs are harder and last longer, but they won't necessarily provide more power in a stock engine. For a daily driver, standard copper or single platinum plugs from a quality brand like NGK or Denso are your best value.
Can I replace just one bad spark plug?
While you can, it is strongly recommended to replace all four spark plugs at the same time. This ensures even performance across all cylinders and saves you from having to do the job again in the near future when the next old plug fails.
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Technical Specifications
OEM Part Numbers: MS851238
Spark plug specifications like heat range, thread size, and gap vary by engine and year. Always confirm the exact part number for your specific Colt (1.5L, 1.6L, 1.8L, 2.0L, or 2.6L engine). Common aftermarket part numbers include NGK BPR5ES-11, BPR6ES-11, and their equivalents from other brands.
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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.