Yes, a faulty or damaged vacuum hose can cause a car to run lean, which means it is burning more air than fuel. This can happen if the vacuum hose is cracked, split, or disconnected, allowing unmetered air to enter the engine. This can lead to a number of symptoms, including:
- Rough idling
- Engine stalling
- Reduced power
- Increased fuel consumption
- Check engine light illumination
If you suspect that your vacuum hose may be causing your car to run lean, it is important to have it inspected and replaced if necessary.
