Why does your fiat palio weekend sometimes over rev on startup?

Over-revving on startup in a Fiat Palio Weekend can be caused by several factors, such as a malfunctioning throttle position sensor, which may send incorrect signals to the engine control unit. Additionally, issues with the idle air control valve could lead to an improper air-fuel mixture, causing the engine to rev higher than normal. Another possibility is a vacuum leak that disrupts the air intake, resulting in erratic engine behavior. Regular maintenance and diagnostics can help identify and resolve these issues.