Hello, I'm hoping that you could shed some light on the issues that I am having with my car. I have a 2000 Nissan Maxima and sometimes while I'm driving the car will not go past 25 mph and the RPM just goes through the roof. This has happened on 3 different occasions within the last 6 months. I have noticed that on the first and very recent occasion, it only happened after turning the A/C on. Any ideas on what this could be would be appreciated!