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I got tired of spending money on new parts and still chasing issues. Finally threw in towel and installed Shrader valves in the wheel stems. All manual now but no more ctis airing down tires, etc. Will keep system installed and intact for future use.

The pressure switch on the PCU?

ECU wasn't the problem. New one did exact same thing. No leaks still. Guess I will start replacing all valves and pressure switches. Anyone have the pressure switches let me know. New only, no used. Wheel Valves I can easily find.

Thank you for the help. Have a few new CTIS parts arriving this week.

The kicker is there is no pattern per sey. Different each time. The pressure switch is the one on the PCU correct? Edit; I will look in the TM

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Agree but now they all do it. The PCU is pushing air (figuratively speaking) as great as ever. Is forcasted to be really warm this weekend. 75-80+ Will see if the cold weather has anything to do with it. I like the system and will buy whatever I need to fix it. The one thing I haven't...

What aboit the ECU getting an over-voltage spike and causing problems? The known issue with the stock alternators frying the PCB and ABS module. Have read about it affecting the ECU also. When my alternator went, it took out those components and my CTIS hasn't worked correctly since. Was...