Passat - Volkswagen :: 2006 - Decelerating At Rapid Pace When Gas Pedal Pressed - Cruise Control Act Intermittently?

I have a 2006 volkswagen passat 3.6 litre v6- have had this car about a year now, 60,000 miles, no problems until recently. Last week I started noticing that when I am driving, with my foot on the gas, it would intermittently act as if it was decelerating at a rapid pace( will drop gears, is NOT a coast)- even when I floored it!! As soon as it stops responding to the throttle I can floor it, nothing will happen, then let the gas peddle go- then reapply gas and it will act perfectly normal- no flooding, no nothing!! I have been able to keep it floored( while it is decelerating) for about 30 seconds, and it seems to make no difference.

The only other problem that I have recently noticed was that my cruise control was acting only intermittently as well. Oh, also while all this is happening it isn't throwing any check engine, or error lights. I have taken it to the dealer, and also to another specialty mechanic( with master certified technicians) and neither seem to find any problem with the vehicle, the only code that they said was found was one to the mass air flow??, but they weren't sure that was actually the problem, as, of course, they cannot seem to replicate my problem, even though it is now happening quite a lot. I am worried about driving my car now as it is quite a hazard when it decelerates rapidly, and to top it all off, we were supposed to leave for a 2,000 mile road trip in 10 days.