Ignition Coil Replacement and Diagnosis for the 1983-1990 Mitsubishi Montero
Keep your first-generation Montero running strong by understanding how to spot and replace a failing ignition coil.
- A failing coil can cause a no-start condition, rough running, or stalling, especially when the engine is hot.
- Replacement is very simple and can be done in under 30 minutes with basic tools.
- There are no recalls or TSBs for this part; failures are typically due to age and heat cycles.
- Choose a premium aftermarket brand like NGK, Delphi, or Hitachi for long-term reliability over cheaper economy options.
Is Your Montero's Ignition Coil Failing?
The ignition coil on the first-generation Montero is a simple but essential component. Because it deals with high heat and high voltage, it can wear out over time. A failing coil can leave you stranded, so it's important to recognize the warning signs. Owners have reported issues like the engine dying when it gets hot and then refusing to start until it cools down.
Common Symptoms of a Bad Ignition Coil:
- Engine Misfires: The engine may sputter, shake, or lose power. This can feel like a hesitation during acceleration.
- Rough Idle: Your Montero might vibrate or run unevenly when stopped at a light.
- Starting Problems: The engine may take longer than usual to start, or it might not start at all (crank-no-start). A no-spark condition is a classic sign. 🎬 Watch: Diagnosing basic symptoms of a crank-no-start condition.
- Stalling: The engine could shut off unexpectedly, especially when idling.
- Poor Fuel Economy: If the coil isn't providing enough spark, fuel may not burn completely, leading to more trips to the gas station.
- Check Engine Light: A misfire caused by a bad coil can trigger the check engine light. Common codes include P0300 (random misfire) or codes P0301-P0304 for specific cylinder misfires.
Can You Drive with a Bad Ignition Coil?
It is not recommended. While the engine may still run, symptoms like stalling, misfiring, and no-start conditions make the vehicle unreliable. Driving with a misfire can also damage other components, like the catalytic converter, leading to more expensive repairs.
Choosing the Right Aftermarket Ignition Coil
For a classic vehicle like the 1983-1990 Montero, 🎬 See this walkthrough of reviving a classic 1989 Montero. finding a new original equipment (OEM) ignition coil from Mitsubishi is nearly impossible. The aftermarket is your best source for this part. However, quality varies significantly between brands.
| Brand Tier | Brands | General Assessment |
|---|---|---|
| Tier 1: Premium Aftermarket | NGK, Delphi, Hitachi | These brands are often original equipment suppliers for many Japanese vehicles and are known for high-quality materials and reliability. They are engineered to meet or exceed OEM standards and are a top choice for durability. |
| Tier 2: Quality Aftermarket | Standard Ignition (SMP), Accel | Standard Motor Products is a well-known aftermarket brand with a reputation for solid performance. Accel is a performance-focused brand, but some users have reported mixed results and potential quality issues with their canister-style coils. |
| Tier 3: Economy Brands | Spectra, DriveWire, Global Parts, WAI Global, Walker Products | These brands offer the lowest price point but come with a higher risk of premature failure. Forum discussions frequently warn against economy brands like Spectra, citing repeated failures despite lifetime warranties. It's often better to spend a little more for a part from a higher tier to avoid doing the job twice. |
A Note on OEM vs. Aftermarket
For this specific part and vehicle age, a premium aftermarket brand like NGK or Delphi is often a better choice than trying to find a used, 30-year-old OEM part. These modern replacements are made with current technology and materials that can offer improved reliability over an aged original part.
Frequently Asked Questions
How do I test my Montero's ignition coil?
The simplest test is to check for spark. You can use a spark tester between the main coil wire and a ground point on the engine. If you have no spark while cranking the engine, and you've confirmed the coil is receiving power, the coil itself is likely bad. Another method is to measure the primary and secondary resistance with a multimeter and compare it to factory specifications.
🎬 Watch: A step-by-step guide to the best coil testing procedure.Are there any recalls for the 1983-1990 Montero ignition coil?
No. Searches of the National Highway Traffic Safety Administration (NHTSA) database show no recalls or technical service bulletins (TSBs) related to the ignition coil for this specific vehicle range.
How difficult is it to replace the ignition coil on my Montero?
This is a very easy job suitable for any DIYer. The coil is typically mounted on the vehicle's inner fender or firewall with one or two bolts. The process involves disconnecting the battery, unplugging the electrical connector, unscrewing the coil, and swapping in the new one. It requires basic hand tools and usually takes less than 30 minutes.
Should I replace my spark plugs at the same time?
Yes, it's always a good idea. A new, strong ignition coil will send a powerful spark. If your spark plugs are old and worn, they won't be able to take full advantage of it. Replacing the coil, distributor cap, rotor, and spark plug wires at the same time is a great way to fully refresh your Montero's ignition system.
Helpful Videos
Technical Specifications
OEM Part Numbers: MD314583 88921387
This vehicle uses a single, oil-filled canister-style ignition coil with an external connector and a single high-voltage tower that connects to the distributor.
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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 Montero: