When warm Volvo 240 starts good but will not idle until you drive a litlle bit?

If your warm Volvo 240 starts but won't idle until driven, it could indicate an issue with the idle air control valve (IAC) or a vacuum leak. The IAC regulates airflow during idle, and if it's malfunctioning, the engine might struggle to maintain a steady idle. Additionally, vacuum leaks can disrupt the air-fuel mixture, causing similar symptoms. It's advisable to check for any diagnostic trouble codes and inspect these components for proper operation.