Mitsubishi Eclipse Fuel Injector Guide for 1996-2004 Models
Keep your 2G or 3G Eclipse running strong with the right new fuel injectors.
- Always replace fuel injectors as a complete, matched set to ensure balanced engine performance.
- Verify your specific engine (4G63, 420A, or V6) before ordering, as injectors are not interchangeable.
- A strong fuel smell is a serious symptom that indicates a potential fire hazard and should be addressed immediately.
- While budget brands are available, mid-tier options like Standard Ignition often provide a better balance of cost and reliability for this component.
Understanding Fuel Injector Issues in Your Eclipse
A failing fuel injector in your 1996-2004 Eclipse can cause a range of problems, from annoying to severe. Because these cars span two generations (2G: 1996-1999 and 3G: 2000-2004) with different engines, symptoms can vary slightly, but the core issues are the same. The most common engines are the 2.0L turbo 4G63 in the GS-T/GSX, the 2.0L non-turbo 420A, and the 3.0L 6G72 V6 in the third generation. No matter your engine, the injectors' job is to deliver fuel precisely. When they don't, you'll feel it.
Signs of a Bad Fuel Injector
If you notice any of these signs, a faulty fuel injector could be the culprit. Ignoring them can lead to more serious engine damage, like a ruined catalytic converter.
- Rough Idle: The engine shakes or vibrates when you're stopped.
- Engine Misfires: You may feel the car hesitate or jerk while driving. This often triggers a Check Engine Light with codes like P0300 through P0306, indicating which cylinder is misfiring. 🎬 Learn how to test if an injector has failed.
- Poor Fuel Economy: A leaking or clogged injector wastes gas, so you'll find yourself at the pump more often.
- Fuel Smell: A strong smell of gasoline around your car can mean an injector is leaking externally or stuck open. This is a serious fire hazard.
- Hard Starting: The engine struggles to turn over, especially when it's already warm.
- Loss of Power: The car feels sluggish and doesn't accelerate like it used to.
Fire Hazard Warning
If you smell raw fuel, do not start your car. An external fuel leak from a cracked injector or bad seal is a significant fire risk. Have your vehicle inspected immediately.
Choosing the Right Aftermarket Fuel Injector
When replacing injectors, you don't have to buy expensive OEM parts. Quality aftermarket brands can provide reliable performance. It's highly recommended to replace all injectors at the same time to ensure they are balanced and flow at the same rate. Mixing old and new injectors can cause the engine to run unevenly.
Brand Options
- Standard Ignition: Often considered a reliable aftermarket option, Standard Ignition aims to match OEM performance. 🎬 See how Standard injectors compare against the competition. Reviews are mixed, as with many aftermarket parts, with some users reporting long-term success and others experiencing early failures. They are generally seen as a step up from budget options.
- GBR Fuel Injection: This brand primarily offers remanufactured injectors. While remanufacturing can be a cost-effective option, quality can be inconsistent. Some users have reported injectors failing or being defective out of the box, leading to repeat repairs.
- Replacement: This is often a generic or private-label brand. Quality can be a gamble. While they offer the lowest price, they may not have the same durability or precise flow rates as higher-tier brands.
Pro Tip: When you replace your fuel injectors, it's a good idea to also replace the fuel filter. This helps prevent any debris in the fuel system from clogging your new injectors.
Cost of Replacing Mitsubishi Eclipse Fuel Injectors
The cost can vary depending on your engine (4-cylinder vs. V6) and whether you do the work yourself or hire a professional. The V6 engine, in particular, requires removing the upper intake manifold, which adds to the labor time.
| Part / Service | Estimated Cost |
|---|---|
| New Aftermarket Injector (Single) | $37 - $182 |
| New Aftermarket Injector (Set of 4) | $148 - $728 |
| New Aftermarket Injector (Set of 6 for V6) | $222 - $1092 |
| Shop Labor Cost | $140 - $450+ |
Frequently Asked Questions (FAQ)
Do I need to replace all my fuel injectors at once?
Yes, it is highly recommended. Fuel injectors are sold in flow-matched sets. Replacing only one can create an imbalance in fuel delivery to the cylinders, causing rough running and performance issues.
Are injectors from a 4G63 (turbo) and 420A (non-turbo) interchangeable?
No, they are not a direct swap. The 4G63 uses low-impedance injectors, while the 420A uses high-impedance injectors. They require different electrical signals from the engine computer. You must use injectors designed specifically for your engine type.
Were there any recalls for fuel injectors on the 1996-2004 Eclipse?
My search did not find any specific recalls for the fuel injectors themselves on 1996-2004 models. However, there were recalls related to the fuel system, such as fuel pump fittings and fuel tank straps, which could cause leaks. No TSBs for this specific year range and part were found either.
Can I clean my old injectors instead of replacing them?
While fuel injector cleaner additives can sometimes help with minor clogs, they are not a long-term solution for a failing injector. Professional ultrasonic cleaning can be effective but requires removing the injectors. Given the labor involved, installing new aftermarket injectors is often a more reliable and time-efficient repair.
Helpful Videos
Technical Specifications
OEM Part Numbers: MR507252 CDH240 INP-018
Fuel injectors for the 1996-2004 Eclipse are engine-specific. The 4G63 (turbo) models use low-impedance injectors, while the 420A (non-turbo) and 6G72 (V6) models use high-impedance injectors. They are not interchangeable without significant modification. Always confirm fitment for your exact year 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.
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