Hello everyone, I recently purchased a 2000 Toyota Avalon XLS with 122,000 miles on it. The vehicle runs perfectly fine when the A/C is not running, however, when I do turn the A/C on, I notice minor tugging or jerking in the engine anywhere between 40 - 75 mph. The vehicle was not doing this the first few weeks that I drove it. No codes are showing and I had the local Toyota dealership and a friend's automotive shop take a look at it only to be told that it was not much of an issue and that it's normal for this vehicle to do this. It seems as if the tugging is occuring when the A/C compressor engages and disengages. Wondering if maybe its low on freon? I also noticed once when I was at a stop light that the car jerked forward as if it wanted to take off while my foot was on the brake. Any advice would help, thank you for your time.