Air Intake System Leakage
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 1984 Volvo 245, 1984 Volvo 244, 1984 Volvo 242, 1983 Volvo 245, and 1983 Volvo 244. However, it is still accessible from the selected car via links, so may be relevant.
Air leakage between air mass meter and engine means that the fuel-air mixture is too lean. Check the hose between air mass meter and the intake manifold, all the hoses and connections to intake manifold, joints for intake manifold and throttle valve housing, etc.