Tried a simpler test. Set cruise for 70. Disengaged and slowed to 60. Resume, but before vehicle reaches 70, try brakes. This works every time. Brake pedal is hard to push, but then returns to normal.
I put that procedure on paper and went back to the Ford dealer. Left car there. Hours later, I learned that they STILL could not replicate.
Next step was to contact the dealer via email. I explained the problem. I received an interesting reply. It came from the service manager, but had a page from AllData on the cruise control. The service manager has stated several things that do not make sense, to me. First, from the AllData page, an electronically controlled throttle body. On several replies, I asked him just how the throttle is operated. He says “drive by wire”. Second, there is absolutely no connection between cruise control and power brakes. But, that goes back to his statement that it is electronically controlled. Even though I can reproduce this effect every time, he still does not seem to understand. This, by , the way, was the person who rode with me and could not detect the problem.
He has to answer to my question as to why this issue happens every time when the engine is under load - such as accelerating back to previous set speed.
I even sent him a page from howstuffworks that specifically describes how cruise control works. I also informed him that three other Ford vehicles I have driven did not have this issue, and neither did this car until fairly recently.
I am not real thrilled driving with my finger parked on the Cancel button.
I was under the impression that service managers had a good understanding of how systems worked.
Nagging thought in my mind is whether he is blowing me off as the genuine repair is insanely expensive.
I am just tired of this. Years ago, I took a car to another dealer. That car had a noisy sunroof. When I went to pick it up, the panel that operated the aunroof was not properly attached to the ceiling. Just hanging down. Noise came back. Took it back two more times. Finally, I was told “that roof has 141,000 miles on it”, and “the glass is warped”. I have not been back to that dealer since 2001. I don’t want anything else broken on the Montego. Are all car dealer service departments full of incompetent people?