- Fuel Pump: A weak or failing fuel pump may not be able to deliver enough fuel to the engine, especially when under a load. Check the fuel pressure to see if it meets the manufacturer's specifications.
- Fuel Filter: A clogged fuel filter can restrict fuel flow to the engine, causing it to cut out under a load. Replace the fuel filter if it is dirty or clogged.
- Ignition System: A weak spark or faulty ignition components can also cause the engine to cut out. Check the spark plugs, spark plug wires, distributor cap, and rotor to make sure they are in good condition and properly connected.
- Air Filter: A dirty or clogged air filter can restrict airflow to the engine, causing it to cut out under a load. Clean or replace the air filter as needed.
- Oxygen Sensor: A faulty oxygen sensor can provide incorrect information to the engine computer, which can cause the engine to cut out. Check the oxygen sensor and replace it if necessary.
- Catalytic Converter: A clogged catalytic converter can restrict exhaust flow from the engine, causing it to cut out. Check the catalytic converter and replace it if necessary.
- Transmission: A faulty transmission can also cause the engine to cut out under a load. Check the transmission fluid level and condition, and have the transmission inspected by a qualified mechanic if necessary.
