It seems that most of the EAS help requests I have gotten fall into the same categories, compressor won't run, slow to rise, on the bumpstops every morning (combined with slow to rise sometimes) and "I have no clue, please save me!"
The easiest place to start is with the compressor operation, and leak testing so I'll start there.
This post is a work in progress I'm finally getting around to starting, please bear with me, I will edit this message with reqests and updates.
You can put requests in this thread, or start a new one, I will add as much as I can here.
You best friends in troubleshooting the system is a tank pressure gage, and the jumper wire procedure, detailed here.
Dropping to bumpstops overnight, and slow to rise in the morning.
Try pulling the delay timer (or ECU connector) and see if it drops overnight. If it stays up, then you have the self leveling putting you on the bumps for some reason. If it drops, then you have leaks. Taking longer to come up means you have an empty tank, sometimes the result of self leveling all the way down, or leaks.
Try that, and see what happens. Slow rising is usually because the comp is running too long because of leaks, trying to fill the tank, and raise the truck all at once.
If you are on the bumps in the morning, let the engine run with a door open (to inhibit rising) and wait for the compressor to stop running (10 min from a completely empty tank)-good time to listen/look for leaks.
Then shut the door and "remind" the system what height you want with the rocker switch. It should come up straight away.
Self Leveling to the bumpstops overnight
When you get out of your RR, you'll hear the valves tick a little bit to compensate for your weight (the drivers side will sit a little higher without your weight. It should only be afew seconds worth. If it goes for a while, it's hunting-you might have a bad sensor, or just out of wack. a re-calibration should cure that.
The sensors value can change over time, making the ECU think the wheel is at a different height than it actually is. The ECU also does geometry with the other 3 wheels and compares. If this is out of calibration tolerances on 1 or more corners, it will confuse the ECU, as it tries to get exactly level (I have no idea why) and lowers each corner in succession to make them all level. Round and round it goes untill you're on the bumpstops. For some reason I havn't figured out yet, sitting on the bumpstops can drain you tank...
If you have a leak('s) in your airsprings or lines, that corner will drop, and the downward sprial begins. Find/fix the leak first.
Along with the below troubleshooting tips, we now have videos to help you out. Many thanks to member Malafax_dand for producing these helpful videos. Follow this link here for his site.