What Can Cause A Car To Stall? CARS.EDU.VN delves into the most frequent reasons why your car might suddenly stop running, offering solutions to get you back on the road. We provide expert insights and actionable advice on engine stalling, idling issues, and automotive troubleshooting, ensuring a smoother driving experience. Explore our website for more detailed guides on vehicle maintenance and preventative measures, along with diagnostic services.
1. Understanding the Basics of Car Stalling
A car stall occurs when the engine unexpectedly stops running while the vehicle is in operation. This can happen at any time, whether you’re idling at a stop light or driving at highway speeds. Understanding the underlying causes can help you diagnose the issue and prevent it from happening again. According to the National Highway Traffic Safety Administration (NHTSA), vehicle malfunctions, including stalling, can significantly increase the risk of accidents.
1.1 What Does It Mean When a Car Stalls?
When your car stalls, it means the engine is no longer receiving the necessary components to sustain combustion. This could be due to a lack of fuel, air, or spark, or a combination of these factors. A stall can be a one-time occurrence or a recurring problem, depending on the root cause. Regular maintenance and prompt attention to warning signs can help prevent stalling and ensure your vehicle’s reliability.
1.2 Why is My Car Stalling Randomly?
Random stalling can be particularly frustrating because it’s hard to predict and diagnose. Possible causes include:
- Electrical Issues: Faulty sensors or wiring can cause intermittent problems.
- Fuel Delivery Problems: A failing fuel pump might not consistently provide enough fuel.
- Vacuum Leaks: These can disrupt the air-fuel mixture, leading to stalls.
- Computer Problems: Issues with the engine control unit (ECU) can cause unexpected shutdowns.
Checking these areas and performing regular diagnostics can help identify the cause of random stalling.
2. Common Causes Related to the Fuel System
The fuel system is crucial for delivering the necessary fuel to the engine for combustion. Problems within this system are a frequent cause of car stalling.
2.1 Empty Fuel Tank
While it seems obvious, running out of gas is a common reason for stalling. Modern cars often have a low fuel warning light, but it’s best to avoid relying on it completely. Refueling regularly ensures a consistent supply and prevents potential damage to the fuel pump, which can occur if it frequently runs dry. According to AAA, running out of gas is one of the most common reasons for roadside assistance calls.
2.2 Clogged Fuel Filter
The fuel filter prevents dirt and debris from entering the engine. Over time, it can become clogged, restricting fuel flow and causing the engine to stall, especially under heavy load. Replacing the fuel filter according to the manufacturer’s recommendations is essential for maintaining proper fuel delivery.
2.3 Faulty Fuel Pump
The fuel pump is responsible for delivering fuel from the tank to the engine. A failing fuel pump may not provide enough fuel, leading to stalling, especially when accelerating or driving uphill. Signs of a failing fuel pump include:
- Difficulty starting
- Loss of power
- Whining noise from the fuel tank
Replacing a faulty fuel pump is crucial to ensure reliable fuel delivery.
2.4 Fuel Injector Issues
Fuel injectors spray fuel into the engine’s cylinders. If they become clogged or faulty, they can disrupt the air-fuel mixture, leading to stalling, rough idling, and poor fuel economy. Cleaning or replacing the fuel injectors can restore proper fuel delivery and prevent stalling.
2.5 Contaminated Fuel
Contaminated fuel, such as fuel containing water or debris, can cause the engine to stall. This can happen if the fuel tank is not properly sealed or if the fuel source is contaminated. Draining and flushing the fuel system can remove contaminants and prevent further issues.
3. Ignition System Malfunctions
The ignition system provides the spark needed to ignite the air-fuel mixture in the engine. Problems within this system can lead to stalling and other performance issues.
3.1 Faulty Spark Plugs
Spark plugs ignite the air-fuel mixture in the engine’s cylinders. Over time, they can become worn or fouled, leading to misfires and stalling. Replacing spark plugs at the recommended intervals ensures proper ignition and prevents performance issues. According to Bosch, spark plugs should be inspected every 30,000 miles and replaced as needed.
3.2 Ignition Coil Problems
The ignition coil provides the high voltage needed to create a spark at the spark plugs. A failing ignition coil can cause misfires and stalling, especially under heavy load. Testing and replacing faulty ignition coils can restore proper ignition performance.
3.3 Distributor Issues
In older vehicles, the distributor directs the high voltage from the ignition coil to the correct spark plug. A faulty distributor can cause misfires and stalling. Modern cars typically use coil-on-plug systems, which eliminate the need for a distributor.
3.4 Crankshaft Position Sensor Failure
The crankshaft position sensor monitors the position and speed of the crankshaft, providing critical data to the engine control unit (ECU). A failing crankshaft position sensor can cause the engine to stall or fail to start. Replacing a faulty sensor is crucial for maintaining proper engine timing and operation.
4. Air Intake System Problems
The air intake system delivers the necessary air to the engine for combustion. Problems within this system can disrupt the air-fuel mixture, leading to stalling and other performance issues.
4.1 Dirty Air Filter
The air filter prevents dirt and debris from entering the engine. A clogged air filter can restrict airflow, leading to a rich air-fuel mixture and stalling. Replacing the air filter at the recommended intervals ensures proper airflow and prevents performance issues. According to K&N, a clean air filter can improve fuel economy and engine performance.
4.2 Mass Airflow (MAF) Sensor Issues
The MAF sensor measures the amount of air entering the engine, providing critical data to the ECU. A faulty MAF sensor can cause the engine to stall, run poorly, or have reduced power. Cleaning or replacing the MAF sensor can restore proper air-fuel mixture and prevent performance issues.
4.3 Throttle Body Problems
The throttle body controls the amount of air entering the engine. A dirty or malfunctioning throttle body can cause rough idling, stalling, and poor throttle response. Cleaning the throttle body can restore proper airflow and prevent performance issues.
4.4 Vacuum Leaks
Vacuum leaks can disrupt the air-fuel mixture, leading to stalling, rough idling, and poor performance. Common sources of vacuum leaks include:
- Cracked or disconnected vacuum hoses
- Faulty intake manifold gaskets
- Leaking PCV valves
Identifying and repairing vacuum leaks can restore proper engine operation.
5. Electrical System Faults
The electrical system powers various components of the engine and provides critical data to the engine control unit (ECU). Faults within this system can cause stalling and other performance issues.
5.1 Failing Alternator
The alternator charges the battery and provides power to the electrical system while the engine is running. A failing alternator can cause the battery to drain, leading to stalling. Signs of a failing alternator include:
- Dimming headlights
- Warning lights on the dashboard
- Difficulty starting
Replacing a faulty alternator is crucial for maintaining proper electrical system operation.
5.2 Weak Battery
The battery provides the initial power to start the engine. A weak or failing battery may not provide enough power, leading to stalling or difficulty starting. Testing and replacing a weak battery can ensure reliable starting and prevent stalling.
5.3 Faulty Wiring and Connections
Faulty wiring and connections can disrupt the electrical signals needed for proper engine operation, leading to stalling. Inspecting and repairing damaged wiring and connections can restore proper electrical system function.
5.4 Engine Control Unit (ECU) Problems
The ECU controls various aspects of engine operation, including fuel delivery, ignition timing, and idle speed. A faulty ECU can cause stalling, poor performance, and other issues. Diagnosing and repairing ECU problems often requires specialized equipment and expertise.
6. Idling Issues
Problems with idling can often lead to stalling, especially in older vehicles.
6.1 Dirty Idle Air Control (IAC) Valve
The IAC valve controls the amount of air bypassing the throttle plate when the engine is idling. A dirty or malfunctioning IAC valve can cause rough idling and stalling. Cleaning or replacing the IAC valve can restore proper idle speed and prevent stalling.
6.2 Vacuum Leaks Affecting Idle
Vacuum leaks can disrupt the air-fuel mixture at idle, leading to stalling. Common sources of vacuum leaks affecting idle include:
- Cracked or disconnected vacuum hoses
- Faulty intake manifold gaskets
- Leaking PCV valves
Identifying and repairing vacuum leaks can restore proper idle operation.
6.3 Incorrect Idle Speed Setting
The idle speed setting determines the engine’s speed when idling. An incorrect idle speed setting can cause rough idling and stalling. Adjusting the idle speed setting to the manufacturer’s specifications can restore proper idle operation.
7. Transmission Problems
In some cases, transmission problems can cause a car to stall, especially in automatic transmissions.
7.1 Torque Converter Issues
The torque converter transfers power from the engine to the transmission in automatic transmissions. A faulty torque converter can cause the engine to stall when coming to a stop. Replacing a faulty torque converter can restore proper transmission operation.
7.2 Sticking Solenoids
Solenoids control the flow of fluid within the transmission. Sticking solenoids can cause the transmission to lock up, leading to stalling. Servicing or replacing sticking solenoids can restore proper transmission operation.
7.3 Manual Transmission Problems
In manual transmissions, stalling can occur if the driver releases the clutch too quickly or if the engine is lugging in too high of a gear. Proper driving technique can prevent stalling in manual transmissions.
8. Emissions Control System Issues
The emissions control system reduces harmful emissions from the engine. Problems within this system can sometimes cause stalling.
8.1 Faulty EGR Valve
The EGR valve recirculates a portion of the exhaust gas back into the engine to reduce emissions. A faulty EGR valve can cause rough idling, stalling, and poor performance. Cleaning or replacing the EGR valve can restore proper emissions control and prevent stalling.
8.2 Clogged Catalytic Converter
The catalytic converter reduces harmful emissions from the exhaust gas. A clogged catalytic converter can restrict exhaust flow, leading to stalling and reduced power. Replacing a clogged catalytic converter can restore proper exhaust flow and prevent performance issues.
8.3 Oxygen Sensor Problems
Oxygen sensors monitor the oxygen content in the exhaust gas, providing data to the ECU for adjusting the air-fuel mixture. Faulty oxygen sensors can cause the engine to stall, run poorly, or have reduced fuel economy. Replacing faulty oxygen sensors can restore proper air-fuel mixture and prevent performance issues.
9. Diagnostic Tools and Techniques
Diagnosing the cause of a car stall often requires the use of diagnostic tools and techniques.
9.1 Using an OBD-II Scanner
An OBD-II scanner can read diagnostic trouble codes (DTCs) from the engine control unit (ECU). These codes can provide valuable information about the cause of the stalling. Connecting an OBD-II scanner to the vehicle’s diagnostic port and interpreting the codes can help pinpoint the problem area.
9.2 Checking for Trouble Codes
Trouble codes can indicate specific problems within the engine management system. Common trouble codes related to stalling include:
- P0300: Random misfire
- P0171: System too lean
- P0172: System too rich
- P0335: Crankshaft position sensor malfunction
Clearing trouble codes after repairs can help ensure the problem is resolved and prevent future issues.
9.3 Visual Inspection
A visual inspection can help identify obvious problems, such as:
- Cracked or disconnected vacuum hoses
- Damaged wiring
- Leaking fluids
Performing a thorough visual inspection can often uncover the cause of the stalling.
9.4 Professional Diagnostic Services
If you’re unable to diagnose the cause of the stalling yourself, consider seeking professional diagnostic services from a qualified mechanic. They have the tools and expertise to accurately diagnose and repair complex automotive problems.
10. Preventative Maintenance to Avoid Stalling
Preventative maintenance is key to avoiding car stalls and other performance issues.
10.1 Regular Tune-Ups
Regular tune-ups include replacing spark plugs, air filters, and fuel filters, as well as inspecting and adjusting ignition timing and idle speed. Performing regular tune-ups can help keep your engine running smoothly and prevent stalling.
10.2 Checking and Replacing Fluids
Checking and replacing fluids, such as engine oil, coolant, and transmission fluid, is essential for maintaining proper engine and transmission operation. Refer to your vehicle’s owner’s manual for recommended fluid change intervals.
10.3 Inspecting and Maintaining Belts and Hoses
Inspecting and maintaining belts and hoses can prevent leaks and failures that can lead to stalling. Check belts for cracks and wear and replace them as needed. Inspect hoses for leaks and swelling and replace them as needed.
10.4 Keeping the Fuel System Clean
Using quality fuel and fuel additives can help keep the fuel system clean and prevent clogging. Avoid running the fuel tank too low, as this can draw sediment and debris into the fuel system.
11. Case Studies: Real-World Stalling Scenarios
Examining real-world stalling scenarios can provide valuable insights into diagnosing and resolving these issues.
11.1 Scenario 1: Stalling After Switching on the AC
A common scenario involves a car stalling after switching on the air conditioning. This can be caused by a faulty idle air control (IAC) valve or a weak alternator. The IAC valve may not be able to compensate for the increased load on the engine when the AC is turned on, leading to stalling. A weak alternator may not be able to provide enough power to the AC compressor, causing the engine to stall.
11.2 Scenario 2: Stalling When Coming to a Stop
Stalling when coming to a stop can be caused by a faulty torque converter, a dirty throttle body, or a vacuum leak. The torque converter may not be unlocking properly, causing the engine to stall. A dirty throttle body can restrict airflow at idle, leading to stalling. A vacuum leak can disrupt the air-fuel mixture at idle, causing the engine to stall.
11.3 Scenario 3: Stalling While Driving Uphill
Stalling while driving uphill can be caused by a weak fuel pump, a clogged fuel filter, or a faulty ignition coil. The fuel pump may not be able to provide enough fuel to the engine under heavy load, leading to stalling. A clogged fuel filter can restrict fuel flow, causing the engine to stall. A faulty ignition coil can cause misfires, leading to stalling.
12. How Weather Conditions Impact Car Stalling
Weather conditions can significantly affect a vehicle’s performance and contribute to stalling issues. Extreme temperatures, humidity, and precipitation can exacerbate existing problems or create new ones.
12.1 Cold Weather Effects
Cold weather can make it harder for a car to start due to the increased viscosity of engine oil and reduced battery performance. Additionally, moisture in the fuel lines can freeze, blocking fuel flow and causing the engine to stall.
- Increased Oil Viscosity: Cold temperatures thicken engine oil, making it harder for the engine to turn over during startup.
- Reduced Battery Performance: Batteries lose capacity in cold weather, reducing their ability to provide the necessary power for ignition.
- Frozen Fuel Lines: Moisture in the fuel lines can freeze, blocking fuel flow and causing the engine to stall.
- Icing of Throttle Body: Ice can form in the throttle body, restricting airflow and leading to stalling.
12.2 Hot Weather Effects
Hot weather can cause fuel to evaporate in the fuel lines, leading to vapor lock and stalling. Overheating can also cause the engine to shut down to prevent damage.
- Vapor Lock: High temperatures can cause fuel to vaporize in the fuel lines, creating vapor bubbles that block fuel flow and lead to stalling.
- Overheating: Excessive heat can cause the engine to overheat, leading to a shutdown to prevent damage.
- Reduced Engine Efficiency: Hot air is less dense, reducing engine efficiency and potentially causing stalling under load.
12.3 Humidity and Precipitation
High humidity can cause moisture to condense in the ignition system, leading to misfires and stalling. Heavy rain can flood the air intake, causing the engine to stall due to water ingestion.
- Moisture in Ignition System: High humidity can cause moisture to condense in the ignition system, leading to misfires and stalling.
- Flooded Air Intake: Heavy rain can flood the air intake, causing the engine to stall due to water ingestion (hydrostatic lock).
- Corrosion: Moisture can accelerate corrosion of electrical connections, leading to intermittent problems and stalling.
13. The Role of Sensors in Preventing Stalling
Modern vehicles rely on a variety of sensors to monitor engine performance and prevent stalling. These sensors provide critical data to the engine control unit (ECU), which adjusts various parameters to maintain optimal operation.
13.1 Importance of Sensor Data
Sensor data is crucial for maintaining proper engine operation and preventing stalling. The ECU uses sensor data to adjust fuel delivery, ignition timing, and idle speed to compensate for changing conditions.
13.2 Key Sensors and Their Functions
- Mass Airflow (MAF) Sensor: Measures the amount of air entering the engine.
- Oxygen Sensors: Monitor the oxygen content in the exhaust gas.
- Crankshaft Position Sensor: Monitors the position and speed of the crankshaft.
- Throttle Position Sensor (TPS): Monitors the position of the throttle plate.
- Engine Coolant Temperature (ECT) Sensor: Monitors the temperature of the engine coolant.
13.3 Consequences of Sensor Failure
Sensor failure can lead to inaccurate data being sent to the ECU, causing the engine to run poorly or stall. Replacing faulty sensors can restore proper engine operation and prevent stalling.
14. Understanding Engine Misfires and Stalling
Engine misfires and stalling are closely related, as misfires can often lead to stalling, especially at low speeds or idle. Understanding the causes of misfires can help prevent stalling.
14.1 What is an Engine Misfire?
An engine misfire occurs when one or more cylinders fail to properly combust the air-fuel mixture. This can be caused by a lack of fuel, air, or spark, or a combination of these factors.
14.2 Common Causes of Misfires
- Faulty spark plugs
- Ignition coil problems
- Fuel injector issues
- Vacuum leaks
- Low compression
14.3 How Misfires Lead to Stalling
Misfires can cause the engine to run rough and lose power, which can lead to stalling, especially at low speeds or idle. Addressing misfires promptly can prevent stalling and other performance issues.
15. CARS.EDU.VN’s Expertise in Diagnosing Stalling Issues
At CARS.EDU.VN, we understand the frustration and inconvenience of a car that stalls unexpectedly. Our team of experienced mechanics is dedicated to providing accurate diagnoses and effective solutions to get you back on the road quickly and safely. We offer a comprehensive range of diagnostic and repair services to address all potential causes of car stalling.
15.1 Comprehensive Diagnostic Services
Our diagnostic services include:
- OBD-II scanning to identify trouble codes
- Visual inspections to detect obvious problems
- Fuel system testing to check fuel pressure and injector function
- Ignition system testing to verify spark plug and coil performance
- Air intake system testing to identify vacuum leaks and MAF sensor issues
- Electrical system testing to assess battery and alternator performance
15.2 Skilled and Certified Mechanics
Our mechanics are skilled and certified to work on all makes and models of vehicles. They have the expertise to accurately diagnose and repair complex automotive problems, including car stalling.
15.3 Commitment to Customer Satisfaction
We are committed to providing excellent customer service and ensuring your satisfaction. We take the time to explain the problem, discuss the repair options, and answer your questions.
16. Step-by-Step Troubleshooting Guide
When your car stalls, following a systematic troubleshooting approach can help you identify the cause and take appropriate action.
16.1 Initial Steps After a Stall
- Safety First: If your car stalls while driving, safely pull over to the side of the road.
- Check the Basics: Ensure you have enough fuel and that the battery is properly connected.
- Try to Restart: Attempt to restart the engine. Note any unusual noises or behaviors.
16.2 Basic Checks You Can Perform
- Visual Inspection: Check for obvious issues like loose wires, disconnected hoses, or leaks.
- Air Filter: Inspect the air filter to see if it’s clogged.
- Fuel Cap: Make sure the fuel cap is tight.
16.3 When to Seek Professional Help
If you’re unable to identify the cause of the stalling or if the problem persists after performing basic checks, it’s best to seek professional help from a qualified mechanic at CARS.EDU.VN.
17. The Future of Car Stalling: Technological Advances
Advancements in automotive technology are aimed at reducing the likelihood of car stalling and improving overall vehicle reliability.
17.1 Improvements in Engine Management Systems
Modern engine management systems are more sophisticated and capable of compensating for changing conditions, reducing the risk of stalling.
17.2 Advancements in Sensor Technology
Improved sensor technology provides more accurate and reliable data to the ECU, enabling it to make better decisions and prevent stalling.
17.3 Predictive Maintenance Systems
Predictive maintenance systems use data analysis to identify potential problems before they lead to stalling, allowing for proactive repairs.
18. Stalling in Electric Vehicles (EVs)
While traditional car stalling involves internal combustion engines, electric vehicles (EVs) can experience similar issues that lead to a complete stop. Understanding these EV-specific causes is crucial for EV owners.
18.1 Unique Causes of Stalling in EVs
- Battery Depletion: Running out of battery charge is the most common cause of an EV “stalling.”
- Thermal Management Issues: Overheating or extreme cold can affect battery performance and lead to a shutdown.
- Software Glitches: Software issues can cause the motor to stop functioning.
- Electrical System Faults: Problems with the high-voltage electrical system can lead to a complete shutdown.
18.2 Diagnostic Approaches for EVs
Diagnosing EV stalling issues requires specialized equipment and expertise. Technicians use diagnostic tools to read error codes from the battery management system (BMS) and other electronic control units.
18.3 Preventative Measures for EV Owners
- Regular Battery Health Checks: Monitor the battery’s health and performance.
- Software Updates: Keep the vehicle’s software up to date.
- Proper Charging Practices: Follow the manufacturer’s recommendations for charging.
- Thermal Management Awareness: Be aware of the impact of extreme temperatures on battery performance.
19. Stalling in Hybrid Vehicles
Hybrid vehicles combine an internal combustion engine with an electric motor and battery, making their stalling issues a combination of both traditional and EV-specific causes.
19.1 Hybrid-Specific Stalling Issues
- Engine-Related Issues: Similar to traditional cars, hybrid vehicles can stall due to fuel, ignition, or air intake problems.
- Electric Motor or Battery Issues: Problems with the electric motor or battery can cause the vehicle to stop functioning.
- Hybrid System Control Issues: Malfunctions in the hybrid system’s control unit can lead to stalling.
19.2 Troubleshooting Hybrid Stalling
Troubleshooting hybrid stalling requires a comprehensive understanding of both the internal combustion engine and the electric drive system. Diagnostic tools are used to read error codes from both systems.
19.3 Maintaining Hybrid Vehicle Reliability
- Regular Maintenance: Follow the manufacturer’s recommended maintenance schedule for both the engine and the hybrid system.
- Battery Care: Maintain the hybrid battery’s health through proper charging and care.
- Professional Inspections: Have the hybrid system inspected by a qualified technician.
20. Resources and Further Reading at CARS.EDU.VN
At CARS.EDU.VN, we are dedicated to providing you with the information and resources you need to keep your car running smoothly. We offer a wide range of articles, guides, and tutorials on automotive maintenance and repair.
20.1 Related Articles and Guides
- “Troubleshooting Common Engine Problems”
- “How to Perform a Basic Car Tune-Up”
- “Understanding Your Car’s Electrical System”
- “Preventative Maintenance Tips for Long-Lasting Vehicle Performance”
- “How to Choose the Right Mechanic”
20.2 Online Diagnostic Tools
We offer online diagnostic tools to help you identify potential problems with your car. These tools can provide valuable insights and help you communicate effectively with your mechanic.
20.3 Expert Advice and Support
Our team of automotive experts is available to answer your questions and provide personalized advice. Contact us today for assistance with your car stalling issues.
Don’t let a stalling car leave you stranded! Visit CARS.EDU.VN for expert advice, comprehensive diagnostic services, and reliable repair solutions. Our team is ready to help you get back on the road with confidence. Contact us at 456 Auto Drive, Anytown, CA 90210, United States, Whatsapp: +1 555-123-4567, or visit our website at cars.edu.vn. We look forward to serving you!
FAQ Section
Q1: What are the most common reasons a car might stall?
A1: The most common reasons include fuel system issues (empty tank, clogged filter, faulty pump), ignition system malfunctions (bad spark plugs, ignition coil problems), and air intake system problems (dirty air filter, MAF sensor issues).
Q2: How can I tell if my fuel pump is going bad?
A2: Signs of a failing fuel pump include difficulty starting, loss of power, and a whining noise from the fuel tank.
Q3: What does it mean when my car stalls after I turn on the AC?
A3: This can be caused by a faulty idle air control (IAC) valve or a weak alternator. The IAC valve may not be compensating properly for the increased load, or the alternator may not be providing enough power.
Q4: Can a dirty air filter cause my car to stall?
A4: Yes, a clogged air filter can restrict airflow, leading to a rich air-fuel mixture and stalling.
Q5: How often should I replace my spark plugs?
A5: Spark plugs should be inspected every 30,000 miles and replaced as needed, according to Bosch.
Q6: What is the role of the Mass Airflow (MAF) sensor in preventing stalling?
A6: The MAF sensor measures the amount of air entering the engine, providing critical data to the ECU. A faulty MAF sensor can cause the engine to stall, run poorly, or have reduced power.
Q7: Is it possible for a vacuum leak to cause my car to stall?
A7: Yes, vacuum leaks can disrupt the air-fuel mixture, leading to stalling, rough idling, and poor performance.
Q8: Can transmission problems cause a car to stall?
A8: Yes, in some cases, transmission problems like a faulty torque converter or sticking solenoids can cause a car to stall, especially in automatic transmissions.
Q9: What is an OBD-II scanner, and how can it help diagnose stalling issues?
A9: An OBD-II scanner reads diagnostic trouble codes (DTCs) from the engine control unit (ECU). These codes can provide valuable information about the cause of the stalling.
Q10: What are some preventative maintenance steps I can take to avoid car stalling?
A10: Regular tune-ups, checking and replacing fluids, inspecting and maintaining belts and hoses, and keeping the fuel system clean are all important preventative maintenance steps.
