2010 Mitsubishi Eclipse Overheating? How to Fix It

How to Fix Overheating

Overheating in your 2010 Mitsubishi Eclipse can be a frustrating and potentially damaging issue. Figuring out the root cause is the first step to getting back on the road. "One thing I noticed is that which my headlights are on it does it a lot worse," noted one owner, indicating the issue could be related to electrical components. (source) This guide walks you through diagnosing and addressing potential overheating problems, focusing on the most likely culprit identified by fellow owners: the solenoid relay.

Symptoms

Owners of the 2010 Mitsubishi Eclipse have reported several symptoms that can indicate an overheating issue. These symptoms often appear intermittently and can be influenced by various factors. It’s crucial to pay attention to these signs to prevent further damage to your vehicle.

One common symptom reported is stalling. If your vehicle suddenly stalls or has difficulty starting, it could be related to overheating affecting the engine's performance. The engine might be unable to maintain a stable idle due to increased temperatures.

A burning smell is another red flag. This smell can indicate that components are overheating and potentially melting or burning. The source of the smell may be difficult to pinpoint, but it often originates from the engine bay. Be sure to check for any visible smoke or leaks when you detect this smell.

Rough idling is also a symptom that many Eclipse owners have noted. When the engine overheats, it can disrupt the combustion process and lead to an unstable idle. You might notice that the engine shakes or vibrates excessively when at a standstill. This symptom is often more noticeable when the engine is already warm.

Finally, some owners have also mentioned a gas smell in conjunction with overheating. This could be due to fuel evaporating from the fuel lines or other components due to the increased heat. A strong gas smell should be investigated immediately as it can be a fire hazard.

Most Likely Cause

Based on owner reports, a malfunctioning solenoid relay is a primary suspect. The solenoid relay plays a critical role in controlling various electrical circuits in your Eclipse. When it fails, it can disrupt the flow of electricity, leading to overheating issues.

The solenoid relay's function is to control high-current circuits using a low-current signal. If the relay becomes corroded, damaged, or begins to fail, it might not properly regulate the current flow, leading to excessive heat buildup in the electrical system. This increased heat can then spread to other components, causing the engine to overheat.

Furthermore, a failing solenoid relay can also cause other related issues. It may trigger erratic electrical behavior such as stalling or rough idling, as the engine management system relies on consistent and stable signals. Diagnosing and replacing a faulty solenoid relay can often resolve these issues and prevent further damage.

How to Diagnose

Diagnosing a solenoid relay issue requires a systematic approach. Begin by gathering the necessary tools and preparing your vehicle for inspection. Ensure the engine is cool before starting any diagnostic procedures.

First, you will need a multimeter to test the solenoid relay. Locate the relay box in your 2010 Mitsubishi Eclipse. The exact location can be found in your owner's manual. Once you've found the relay box, identify the solenoid relay based on the diagram printed on the box cover.

Next, remove the solenoid relay from the relay box. Use the multimeter to test the relay's continuity. Refer to the relay's specifications to determine the correct resistance values. If the resistance is outside the specified range or if there is no continuity, the relay is likely faulty.

You should also visually inspect the relay for any signs of damage. Look for corrosion, cracks, or burn marks. These signs can indicate that the relay has failed and needs to be replaced. Ensure the connections to the relay are clean and secure.

Finally, if possible, try swapping the solenoid relay with a known good relay from another non-critical system in your vehicle. If the symptoms disappear after the swap, it confirms that the original solenoid relay was the problem. "Here’s where the fuse is shown in the circuit diagram, between fusible link 8 and the ABS Power Relay," one owner noted, highlighting the importance of checking circuit diagrams. (source)

Step-by-Step Fix

Replacing a faulty solenoid relay is a straightforward process that most owners can handle themselves. Follow these steps carefully to ensure a successful repair.

1. Gather Your Tools: You will need a new solenoid relay, a socket wrench set, and potentially a pair of pliers.
2. Locate the Relay Box: Consult your 2010 Mitsubishi Eclipse owner's manual to find the exact location of the relay box. It is typically located under the hood or inside the cabin near the dashboard.
3. Identify the Solenoid Relay: Refer to the diagram on the relay box cover to identify the solenoid relay. The diagram will show the location and function of each relay in the box.
4. Disconnect the Battery: Disconnect the negative terminal of your vehicle's battery to prevent any electrical shorts during the replacement process.
5. Remove the Old Relay: Gently remove the old solenoid relay from the relay box. Use pliers if necessary to get a better grip, but be careful not to damage the surrounding components.
6. Inspect the Relay Socket: Check the socket where the relay was installed for any signs of corrosion or damage. Clean the socket with a wire brush if necessary.
7. Install the New Relay: Insert the new solenoid relay into the socket. Ensure it is securely seated and oriented correctly.
8. Reconnect the Battery: Reconnect the negative terminal of your vehicle's battery.
9. Test the System: Start your 2010 Mitsubishi Eclipse and check if the overheating symptoms have disappeared. Monitor the engine temperature and listen for any unusual noises.
10. Verify Functionality: Drive the vehicle for a short distance to ensure the repair has resolved the issue completely. Keep an eye on the engine temperature gauge.

Replacing the solenoid relay can often resolve the problem if it is the root cause. "It says that it fits my car but idk if it’s my error or the part didn’t actually fit," one owner remarked, stressing the importance of verifying parts. (source)

Parts and Tools Needed

• New Solenoid Relay (Part number varies depending on the specific function)
• Socket Wrench Set
• Pliers (optional)
• Multimeter (for testing)
• Wire Brush (for cleaning the socket)

Ensure you purchase a high-quality solenoid relay that is compatible with your 2010 Mitsubishi Eclipse. Refer to your owner's manual or a trusted auto parts store for the correct part number.

Real Owner Costs

The cost of addressing a solenoid relay issue in your 2010 Mitsubishi Eclipse can vary depending on whether you choose to perform the repair yourself or take it to a professional mechanic. Here's a breakdown of potential costs:

DIY Repair:

• Solenoid Relay: $10 - $50 (depending on brand and quality)
• Tools (if needed): $20 - $50 (socket wrench set, multimeter)

Total DIY Cost: $30 - $100

Professional Repair:

• Solenoid Relay: $10 - $50
• Labor Costs: $75 - $150 (depending on the shop's hourly rate and the complexity of the job)

Total Professional Cost: $85 - $200

One owner, Raider_831, highlighted the importance of getting the right parts. "My question is do any of you guys know a good place/link to get them that will fit no issues. I know Autozone and O’Rillys will often give wrong parts." (source) Therefore, it is essential to source your parts from a reputable supplier to ensure they fit correctly and function as expected.

Prevention

Preventing solenoid relay failures in your 2010 Mitsubishi Eclipse involves regular maintenance and proactive inspections. Here are some tips to help you avoid future issues:

• Regular Inspections: Inspect the solenoid relays periodically for any signs of corrosion, damage, or loose connections. Clean the connections with a wire brush and apply dielectric grease to protect against moisture.
• Maintain Electrical System: Ensure your vehicle's electrical system is functioning correctly. Check the battery voltage, alternator output, and grounding points regularly. A stable and well-maintained electrical system can help prevent excessive strain on the solenoid relays.
• Avoid Overloading Circuits: Do not overload the electrical circuits in your vehicle by adding too many aftermarket accessories. Overloading can cause the solenoid relays to work harder and fail prematurely.
• Use Quality Parts: When replacing solenoid relays, always use high-quality parts from reputable manufacturers. Cheap or low-quality relays may not meet the required specifications and can fail quickly.
• Address Issues Promptly: If you notice any electrical issues, such as flickering lights or intermittent starting problems, address them promptly. These issues can be early warning signs of a failing solenoid relay.

What Owners Say

Real experiences from MITSUBISHI owners:

Owner Experiences

"My spark plugs look good, spark plugs wires look good and both aren’t old less than 1 year. So my next step is to test my injectors to see if they’re the issue." — Raider_831 (source)

"My question is do any of you guys know a good place/link to get them that will fit no issues. I know Autozone and O’Rillys will often give wrong parts." — Raider_831 (source)

"Here’s where the fuse is shown in the circuit diagram, between fusible link 8 and the ABS Power Relay. You must be logged in to view this image or video." — 19Eclipse90 (source)

FAQ

Q: How long does it take to fix overheating?

A: If the issue is a simple solenoid relay replacement, it can take anywhere from 30 minutes to an hour. However, if the overheating is due to more complex issues, such as rust or other electrical problems, it could take several hours to diagnose and repair. According to owner reports, getting the right parts is crucial for a quick fix.

Q: Can I drive with overheating?

A: Driving with overheating is not recommended. Continuing to drive can cause significant damage to the engine, potentially leading to costly repairs. It is best to address the overheating issue as soon as possible.

Q: Is this a common issue on the 2010 Mitsubishi Eclipse?

A: Based on the available data, solenoid relay issues leading to overheating are not uncommon in the 2010 Mitsubishi Eclipse. Electrical components are susceptible to wear and tear, and the solenoid relay is a critical part of the electrical system. Regular maintenance and inspections can help prevent these issues.

Q: DIY vs mechanic - what's recommended?

A: Replacing a solenoid relay is generally a straightforward task that most owners can handle themselves. However, if you are not comfortable working with electrical systems or if the overheating is due to a more complex issue, it is best to consult a professional mechanic. The cost of a professional repair may be higher, but it can ensure the job is done correctly and prevent further damage. As one owner, Rice Burner, noted, "It has rust on the end where the hose would connect and other spots internal spots, In general its got bad rust issues. My issue now is locating a replacement." (source)