bwmc

Good day. Asking for assistance, please. Air compressor went bad3 months ago. Changed and everything was fine up until last week. Losing air and vehicle not rising to the proper height. So I changed the control valve. Still same issue. Not on the ground. Rising about 60%. Please, may I ask for direction? Struts changed at dealer 4 years ago. Not a hard driver. Maybe 40 miles a day, 5 days a week. Original. Just reached 100kon the odometer.