2007 Mitsubishi Galant Engine Is Stalling

Troubleshooting Causes of Engine Stalling in Your 2007 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
0%
15% chance it's the
Air Intake System
0%
55% chance it's
Something else
The most common reasons a 2007 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 2007 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.

What are the initial diagnostic steps to take when a 2007 Mitsubishi Galant's engine is stalling?

When diagnosing engine stalling issues in a 2007 Mitsubishi Galant, it's essential to adopt a methodical approach that begins with the most accessible components. Start by inspecting the fuel system, as a malfunctioning fuel pump or a clogged fuel filter can significantly impact engine performance. Next, turn your attention to the ignition system; worn spark plugs or damaged ignition coils can lead to misfires and stalling. Utilizing an OBD-II scanner is a crucial step, as it allows you to retrieve error codes that can pinpoint specific problems within the engine's computer system. Additionally, examine the air intake system for any blockages or leaks, as these can disrupt the air-fuel mixture necessary for smooth operation. Finally, test critical sensors like the throttle position and mass airflow sensors, as faulty readings can lead to erratic engine behavior. By following this structured diagnostic approach, you can effectively identify and address the root causes of stalling in your Galant, empowering you to perform necessary repairs with confidence.

What are the common problems that could cause the engine to stall in a 2007 Mitsubishi Galant?

When diagnosing engine stalling in a 2007 Mitsubishi Galant, it's essential to consider several common problems that could be at fault. A faulty mass airflow sensor can significantly disrupt the air-fuel mixture, leading to stalling; thus, checking its functionality is crucial. Additionally, a dirty or malfunctioning idle air control valve can affect the engine's idle speed, making it another potential culprit. It's also important to inspect the fuel system, as a clogged fuel filter can restrict fuel flow, resulting in stalling. Furthermore, worn-out spark plugs or faulty ignition coils can cause misfires, which may lead to engine stalling as well. Don't overlook the fuel pump, as any issues here can hinder fuel delivery to the engine. Lastly, vacuum leaks can create imbalances in the air-fuel mixture, contributing to stalling problems. By systematically addressing these areas, DIY enthusiasts can effectively troubleshoot and resolve stalling issues in their Galant, ensuring smoother operation and enhanced performance.

How urgent is it to address the stalling issue in a 2007 Mitsubishi Galant?

Addressing the stalling issue in a 2007 Mitsubishi Galant is of utmost urgency due to the serious safety risks it poses. Stalling can happen unexpectedly, particularly while driving at high speeds or in heavy traffic, significantly increasing the likelihood of accidents. Moreover, neglecting this problem can lead to more severe engine damage or complications with other vehicle components, resulting in costly repairs down the line. Regular maintenance and prompt repairs are essential not only for the vehicle's performance but also for ensuring the safety of its occupants and other road users. Therefore, it is crucial to have the stalling issue diagnosed and repaired by a qualified mechanic as soon as possible to mitigate any potential risks and maintain the vehicle's overall health.

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