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I ended up changing out the solenoids after a parts source on here mysteriously ran out of the PCU's once they realized they had been selling them for the wrong price and giving me the run around. I changed them with the Peter Pauls that were listed on another thread and it fixed the problem...

Ok I went back out and this is what I discovered, it cycles pretty fast, I took the line off that goes to the wheels and you could not hold your finger over the line each time it cycled. Plenty of air, way more than the 12psi check. It also blows air out the whole on the side of the cover that...

Tires are up. The system worked fine for about a year so I know what it sounds like when its working properly. I have left it sit for a while and eventually it just stops. But the light stays flashing.

I have read other posts. I have read the TM's. I've read the CTIS manual and none of them have the problem that I'm having. I've tracked air lines, checked valves and I have no clue. When you get the system up to pressure the PCU valve just starts making a constant pfft pfft pfft pfft sound. The...