Mitsubishi Galant Engine Is Stalling

Common Causes of Engine Stalling in Your Mitsubishi Galant and How to Resolve Them

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Reviewed by
Bo Fader
Written by RepairPal Car Genius
Updated January 14, 2025
0%
30% chance it's the
Fuel System
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15% chance it's the
Air Intake System
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55% chance it's
Something else
The most common reasons a Mitsubishi Galant engine is stalling are the fuel system, the air intake system, or the ignition system.
  • Fuel System: A clogged fuel filter or failing fuel pump can restrict fuel flow, resulting in poor engine performance and starting issues.
  • Air Intake System: A dirty or damaged air filter or a malfunctioning mass airflow sensor can restrict airflow, leading to reduced engine performance and efficiency.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a Mitsubishi Galant engine is stalling?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

If the MAF sensor sends an erroneous signal, a few things happen. The engine's computer will trigger the check engine light, and the on-board diagnostic (OBD) trouble codes will reflect the airflow discrepancy noted by the MAF sensor. Depending on the reported volume of air, the engine may try to compensate for these conditions, causing the engine to burn excessive amounts of fuel and emit black smoke from the exhaust. In this case, the OBD trouble codes would also reference faults recognized by the exhaust oxygen sensors. The engine may also have issues with idling roughly, failing to start, stalling, hesitation, power loss, misfires, and fuel consumption.

»MORE: Signs of a failing mass airflow sensor

A faulty oxygen sensor is one of the most common causes of a check engine light. Symptoms may include a decrease in fuel mileage, hesitation or misfiring from the engine, rough idling or even stalling. A faulty sensor may cause the vehicle to fail an emissions test.

Any time there is an emissions fault the check engine light will be displayed. The purpose of the check engine light is to inform the driver that an emission related fault has been found, and that there are on-board diagnostic (OBD) trouble codes stored in the powertrain or engine control module. Additionally, since the emissions systems are so intertwined into engine control and transmission control systems, symptoms may include nearly any sort of drivability concerns. This may include harsh shifting, failure to shift, hesitation on acceleration, jerking, engine failure to start or run, loss of power, or any number of other drivability issues.

When the Check Engine Light comes on, you may experience engine performance issues such as poor acceleration, rough idling, or an engine that won't start. In some cases, no abnormal symptoms will be experienced. Other systems like the transmission or ABS can cause the Check Engine Light to illuminate and lights for those systems can come on at the same time. Similar lights may say "Check Engine Soon", "Malfunction Indicator Light" or just "Check". In rare case the engine can overheat.

Troubleshooting Engine Stalling Issues in a Mitsubishi Galant

When troubleshooting engine stalling issues in your Mitsubishi Galant, begin by examining the fuel system, as it is often the most straightforward area to assess. Check the fuel pump and filter for any signs of blockage or failure, as these can significantly disrupt fuel flow. Next, inspect the air intake system, particularly the Mass Airflow Sensor and idle air control valve, since malfunctions here can lead to improper air-fuel mixtures, resulting in stalling. After addressing these components, turn your attention to the ignition system; a faulty ignition switch can manifest as stalling while driving or difficulty starting the engine. If these checks do not resolve the issue, consider the Engine Control Module (ECM) and the crank position sensor, as problems with these components can lead to more severe performance issues. By following this diagnostic approach, starting with simpler fixes and progressively tackling more complex systems, you can effectively identify and resolve the stalling problem in your Galant. Always remember to consult expert resources or a qualified mechanic if you encounter challenges during your troubleshooting process.

What to Do When Your Mitsubishi Galant Engine is Stalling?

When your Mitsubishi Galant engine is stalling, it's crucial to identify the common problems that may be at play. Start by examining the fuel system, as issues like inadequate fuel delivery or poor fuel quality are frequent causes of stalling. Next, inspect the air intake system for any clogs or leaks that could disrupt airflow and affect engine performance. The ignition system is another key area to check; worn spark plugs or faulty ignition coils can lead to irregular engine operation. Additionally, the Mass Air Flow (MAF) sensor is essential for regulating air intake, and any malfunction can result in stalling and trigger the check engine light. Lastly, the idle air control valve is vital for maintaining a stable idle; if it’s malfunctioning, it may require repair or replacement. By methodically assessing these components, you can effectively troubleshoot the stalling issue in your Mitsubishi Galant. If these checks do not resolve the problem, consulting a mechanic for a comprehensive diagnosis is recommended.

Why is the Engine Stalling in a Mitsubishi Galant?

When your Mitsubishi Galant experiences engine stalling, it’s crucial to address the issue promptly to avoid serious safety hazards and costly repairs. Ignoring symptoms such as erratic idling or sudden stalls can lead to dangerous situations, especially if they occur while driving. Common culprits like a faulty idle air control valve or a malfunctioning MAF sensor can disrupt engine performance, potentially leaving you stranded or causing accidents. Additionally, issues such as vacuum leaks or worn spark plugs can exacerbate the problem, leading to further engine damage if not resolved. By diagnosing and fixing these problems early, you not only enhance your vehicle's reliability but also ensure your safety on the road. Taking action at the first sign of trouble can save you from more extensive repairs down the line, making it essential for any DIY enthusiast to stay vigilant and proactive in maintaining their Mitsubishi Galant.

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