The issue with your 1989 Volvo GL bogging down and sounding like it's sucking air when you accelerate could be due to a vacuum leak or a malfunctioning air intake system. When the engine is cold, these issues can cause improper air-fuel mixture, leading to poor performance and triggering the service light. Additionally, a dirty or failing mass airflow sensor or fuel delivery problem may also contribute to these symptoms. It's advisable to check for vacuum leaks, inspect the air intake components, and ensure the fuel system is functioning properly.
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