My 2005 HR Endeavor is leaking air, about 6o lbs over a 4 hour period. I have tried soapy water on everything that looked like a air valve or air hose with no luck. Took it to a mechanic and he tried...
That's a big enough leak that you might actually be able to hear it. Good luck - I spent a while today chasing an air leak. It ended up being a ball valve and the soapy water wouldn't find it because of where it was located.