Remember my AC problem with the car (1993 Civic Si with 215k miles) almost stalling. Well now I noticed that if I keep the fan on #1 the car sits nice. When I select #2 the car's rpms drop a little. On #3 the car starts to stutter and rpms drop really low. On #4 the whole car shakes and feels like it's about to stall. What's going on here? Alternator going? Something is not charging right?

Also at the last autocross my 1st run my car's temp was fine. But runs 2, 3, & 4 the temp gauge would shoot up after driving the car hard in the first 10 seconds. I saw the temp gauge almost touch red every run. I bled the coolant for almost 30-40 minutes, refilling it when the themorstat opened up. What's going on here? Water pump? Timing belt? Accessory belts?

Also noticed the rpms climbed when I pumped the brakes at the start line and then return to normal.

I think my car is cursed