1. Coolant Temperature Sensor:
- A faulty coolant temperature sensor can send incorrect
temperature readings to the engine control module (ECM),
causing the ECM to miscalculate the fuel mixture and ignition
timing, leading to stalling.
Symptoms:
- Engine overheating
- Check engine light
- Reduced fuel efficiency
2. Fuel System:
- Clogged fuel injectors
- Faulty fuel pump
- Blockages in the fuel lines
- Faulty fuel pressure regulator
Symptoms:
- Rough idling
- Lack of power
- Hesitation during acceleration
- Engine stalling
- Check engine light
3. Ignition System:
- Faulty spark plugs
- Worn-out spark plug wires
- Corroded ignition coil
Symptoms:
- Engine misfiring
- Rough idling
- Stalling
4. Idle Air Control (IAC) Valve:
- A malfunctioning IAC valve can lead to an incorrect air mixture, causing the engine to stall.
Symptoms:
- Rough idling
- Stalling after start-up
- Low or erratic idle
- Check engine light
5. Vacuum Leak:
- A vacuum leak can cause the engine to receive an unmetered
air intake, which can lead to stalling.
Symptoms:
- Rough idling
- Engine stalling
- Decreased fuel efficiency
- Check engine light
6. Engine Mechanical Issues:
- Worn piston rings
- Weak valve springs
- Clogged catalytic converter
- Head gasket failure
Symptoms:
- Low engine compression
- Engine overheating
- Reduced power
- Check engine light
7. Computer and Electrical Problems:
- Faulty ECM
- Corrupted computer programming
- Wiring problems
Symptoms:
- Stalling
- Rough running
- Poor fuel economy
- Check engine light is ON
8. Transmission Problems
- Faulty lockup torque converter clutch
- Low transmission fluid
- Transmission control module problems
Symptoms:
- Stalling after shifting
- Transmission slipping or shuddering
- Check engine light is ON
To accurately determine the cause of the stalling issue and ensure a proper repair, it is recommended to have a qualified mechanic diagnose the problem.
