[77newell]

Hey Serge, sorry for your troubles. It would help me to know what label is on the gauge you say is cycling between 0 and 60. Is this a coach mounted gauge or a compressor mounted one? If on the coach, which gauge and what are the other ones reading.

Also, did this problem change or not when you changed the 6-pack valves. Given that both compressors, engine and house, are struggling to keep up, you do have a leak somewhere. Be aware that on the bulkhead just ahead of the front rear axle is a mass of air plumbing that includes two quarter turn valves that allow you to selectively shut off air to the front and rear leveling, other other non-brake uses. The front pressure is reported on my dash "supply" gauge and the rear pressure is reported on the gauge mounted on my rear 6-pack. When both gauges are open they will read the same.