I am having a problem. I recently flushed my radiator because the car was getting too high on the "normal" gauge and when I opened the radiator cap the coolant was a chocolate brown. I flushed it and what came out looked just like chocolate..smelled awful too. Well now its going on a week since I did that and the car is gets too high in temperture. When I drive with the A/C on the car gets hot to the point of overheating and I have to turn the A/C off to bring down the temperture. Any ideas what could be wrong???