I have read through the many threads on this issue the past few years, and I do realize there are many. A year ago I got the dreaeded suspension fault. A local mechanic drilled out muffler and EAS has worked great. A few days ago driving to the store, suspension fault, RR lowered and got the do not exceed 30MPH. Got home, RR was lowered to bumper stops. The next day tried to raise RR and only rear went up after awhile and vehicle raising slowly message. Thought maybe EAS was getting old, so ordered the rebuild kit. I received today, rebuilt and seemed to have good output air and suction on EAS. However, still same issue. Get slow raising warning, turns off a few times to cool off, and and eventually get a suspension fault. The front is at bumber stops, rear has stayed to what it raised to. Can't check for leaks at different heights as front doesn't raise, would both front sides go bad at same time? Would the front valve block be the next logical choice? Any other steps I should take before I turn it over to my mechanic. Appreciate the support, great forum!