- Fuel filter is clogged. A clogged fuel filter can restrict fuel flow to the engine, causing it to run lean and stall.
- Fuel pump is failing. A failing fuel pump can also cause a lean-running engine and stalling.
- Idle air control valve (IAC) is dirty or faulty. The IAC valve controls the amount of air that bypasses the throttle body when the engine is idling. A dirty or faulty IAC valve can cause the engine to idle too low and stall.
- Throttle position sensor (TPS) is out of adjustment. The TPS tells the engine control module (ECM) the position of the throttle valve. An out of adjustment TPS can cause the engine to idle too high or too low and stall.
- Air intake is blocked. A blocked air intake can restrict air flow to the engine, causing it to run lean and stall.
- Vacuum leak. A vacuum leak can also cause a lean-running engine and stalling.
- Spark plugs are worn out or faulty. Worn out or faulty spark plugs can cause the engine to misfire and stall.
- Spark plug wires are loose or damaged. Loose or damaged spark plug wires can also cause the engine to misfire and stall.
- Distributor cap is cracked or damaged. A cracked or damaged distributor cap can allow moisture to enter the distributor, causing the engine to run rough and stall.
- Rotor button is worn out or damaged. A worn out or damaged rotor button can also cause the engine to run rough and stall.
- Fuel injectors are clogged or dirty. Clogged or dirty fuel injectors can cause the engine to run lean and stall.
- EGR valve is stuck open or closed. A stuck open or closed EGR valve can also cause the engine to run rough and stall.
- Oxygen sensor is faulty. A faulty oxygen sensor can cause the engine to run rich or lean and stall.
- Catalytic converter is plugged. A plugged catalytic converter can restrict exhaust flow, causing the engine to run rough and stall.
- Computer problems A faulty computer can cause the engine to run improperly, leading to stalling issues.
