Is your car running rough, stalling, or throwing a check engine light? A failing fuel injection throttle body could be the culprit. Here's how to tell:
- Rough Idling: The engine shakes or runs unevenly when stopped.
- Stalling: The engine shuts off unexpectedly, especially at low speeds.
- Poor Acceleration: The car feels sluggish when you try to speed up.
- Check Engine Light: The light comes on, often with codes related to the throttle body or air/fuel mixture.
- Hesitation: The engine pauses or stumbles when you press the gas pedal.
Testing the Throttle Body:
- Visual Inspection: Check for dirt, carbon buildup, or damage around the throttle plate.
- Scan for Codes: Use an OBD2 scanner to read any trouble codes stored in the car's computer. Codes like P0121, P0122, P0123, P0106, P0507 often point to throttle body issues.
- Throttle Plate Movement: With the engine off, check if the throttle plate moves smoothly when you open and close it by hand (if applicable to your model).
- Wiring and Connectors: Inspect the wiring and connectors for damage or corrosion.
Common Failure Causes:
- Carbon Buildup: Dirt and grime accumulate on the throttle plate and bore, restricting airflow.
- Wear and Tear: Over time, the throttle body's internal components can wear out.
- Electrical Issues: Problems with the throttle position sensor (TPS) or throttle actuator motor.
- Moisture: Water can enter the throttle body and cause corrosion or electrical problems.
