I'm an owner of a 2000 dogde Intrepid ES 3.2 l v6 engine with 110,000 miles. I recently purchased the car (about 8 months ago with 104,000 miles) in the winter. Now that summer is here I had my air conditioner serviced, my mechanic found a leak in the expansion valve it only needed a new gasket so that took care of that. The problem occurs when I accelarate I 'm hearing a surging nosie or kinda like the engine is racing it only occurs when the air conditioner is on; only when I accelarate. When the heat is on theres no problem. What can solve this problem, what can it be? Please let me know all possibillities Thanks for your help.