Air shock problem

[Chaharly]

About %30 of the time when i press my rear shock button. It reads zero, when i press the "M" button to fill it up to about 50, it goes up to 50 really fast on the computer, but not in the shock itself. It does it alot more frequently in the cold. What does this? also after pressing the M and it "fills" when i press the rear button again it says 15 and does it over.... i have an 85 venture royale... anyone know what to do?

[bongobobny]

This is a wild shot but here goes! There is a cylander that contains desicant inside that helps control the moisture in ther lines. It needs to be replaced, or revitalized in a microwave until it changes from pink back to blue (or is that the other way around?). It is on the unit that haqs the solenoids and pump on it. It is silver and the only cylander that has no wires coming to it. It is inline and unscrews.

 

You may want to make sure the rubber exhaust valve thingey is not clogged up, or the inline filter is not plugged up...