Fuel Supply Issues:
1. Fuel Filter: A clogged fuel filter can restrict the flow of fuel to the engine, causing hesitation, stalling, and difficulty starting. Check and replace the fuel filter if necessary.
2. Fuel Pump: A weak or failing fuel pump may not be able to deliver enough fuel to the engine, especially at lower RPMs. Check fuel pressure and replace the fuel pump if needed.
Electrical Issues:
3. Ignition System: Check components like spark plugs, spark plug wires, distributor cap, and rotor for wear or damage. Replace any faulty components.
4. Fuel Injector: A faulty fuel injector can cause irregular fuel delivery, leading to stalling and difficulty starting. Check the fuel injectors for proper functioning and clean or replace them as needed.
5. Battery Connections: Ensure the battery terminals and cable connections are clean and tight to ensure proper electrical flow.
Vacuum Leaks:
6. Vacuum Lines: Check for any cracked, disconnected, or loose vacuum lines, as they can affect the engine's air-fuel mixture and result in stalling.
Oil Leak:
7. Starter Seal: If the starter is covered in oil, the oil seal may be worn or damaged, causing oil to leak and potentially interfere with the starter's operation. Replace the starter seal to stop the oil leak.
Timing Issues:
8. Timing Belt: A worn or misaligned timing belt can disrupt the engine's timing, leading to starting issues and stalling. Check and replace the timing belt as per the maintenance schedule.
IAC (Idle Air Control) Valve:
9. Carbon Buildup: The IAC valve might be dirty or have carbon buildup preventing it from properly controlling the engine's idle speed. Clean or replace the valve to ensure smooth idling.
It's advisable to have a mechanic diagnose the exact issue since it can be caused by multiple factors. You may also want to get the engine control module (ECM) checked for any stored trouble codes that could indicate the root cause of the problems.
