I am now starting to suspect it is the EAS Driver Block, the black thing mounted on the side of the valve block. They are not user-serviceable and nor are they cheap to buy. On the rare occasion that they do play up, the results are unpredictable.

Before going further look at this page at rr.net suspump and try the "Manual Activation of EAS Valves using Jumper Wires" to confirm whether you can manually operate the solenoids and compressor using "pigtails".

 

i'm going to do this, but i also have a replacement driver block and EAS ECU on the way that i can try out before i buy it to see if it fixes the problem.

its gotta be one of the two, or both.

 

block drive was the issue behind the leveling problem.

now time to figure out whats up the compressor not wanting to turn on without being jumped.