finaly decided to conv. to springs, arnott kitt# C-2987 which comes with a EBM which taps into the obd2 port wiring with wire tapins kitt from CARID company,also 4 each rubber insulators p/n #K160072 // moog part for top and bottom of springs to insulate potential noises, and bilstein 4600 shocks frt & rear, will comment on this when completed.

 

letting air out did NOT work, out of the cabin air valve, as i ment. probably a solenoid or check valve.

 

the spring are dual stage