Fuel System Issues (Most Likely):
* Loose or damaged fuel lines: Turning can stress fuel lines, especially older, brittle ones. A loose connection or a crack that opens under pressure could restrict fuel flow, causing sputtering and stalling. This is more likely if the problem is intermittent or only occurs on sharp turns.
* Fuel pump: A failing fuel pump might struggle to keep up with demand, and the change in vehicle angle during a turn could exacerbate this. The pump might be weak, have a failing pressure regulator, or have debris inside. A low fuel level could also worsen a weak pump's performance.
* Fuel filter: A clogged fuel filter restricts fuel flow, and the added stress of turning can make this more noticeable.
* Clogged fuel injectors: Similar to the fuel filter, clogged injectors can reduce fuel delivery, and turning can further restrict flow.
* Loose or corroded electrical connections: Connections in the fuel system (pump, injectors) can corrode or become loose. Turning can cause them to lose contact temporarily.
Other Possibilities:
* Ignition system problems: While less likely to be specifically triggered *by* a turn, a weak ignition coil, faulty distributor cap/rotor (in older vehicles), or failing ignition switch could cause sputtering and stalling, especially under load. The added stress of a turn could be the final straw.
* Mass Airflow Sensor (MAF) or other sensors: A faulty MAF sensor provides incorrect information about the air-fuel mixture, leading to sputtering. While turning doesn't directly cause MAF sensor failure, the change in vehicle attitude might momentarily affect its readings.
* Vacuum leaks: A vacuum leak can disrupt the engine's intake system, and turning might stress connections causing a leak to become more apparent.
* Loose ground cable: A poor ground connection can disrupt the electrical system. Turning might momentarily break a weakened connection.
Troubleshooting Steps:
1. Check the fuel level: Ensure you have enough fuel.
2. Listen for unusual noises: Does the fuel pump make a whining sound?
3. Inspect fuel lines and connections: Look for any visible damage or loose fittings, especially near the tank and engine.
4. Check the fuel filter: If easily accessible, inspect it for clogging.
5. Have a mechanic diagnose the issue: This is crucial. They have the tools and experience to pinpoint the problem accurately, which could involve diagnostic scans and pressure tests.
Important Note: Driving a car that sputters and stalls is dangerous. It's best to have it towed or driven very cautiously to a mechanic to avoid further damage or an accident.
