To troubleshoot low pressure issues in your irrigation system, start by checking the pump’s performance and ensuring it is operating within the recommended pressure range. Next, inspect the suction line for blockages or restrictions, and verify that the valve settings are correct. Check the irrigation pipeline for leaks, kinks, or blockages, and ensure that the sprinkler heads are clean and free of debris. If the issue persists, consider upgrading to a more powerful pump or adjusting the piping layout to reduce pressure losses.