I have a 2002 Honda Civic, it has been working great for many years until now. I have been having strange things happen: When I apply the brakes or roll down the window the RPM drops and my radio cuts off.
I have replaced the IAC valve and tested for leaks. I have also cleaned out the throttle body but the problem is still there. Couple of thing to note: when the car is cold I do not have the above problems, it’s only when the car has been driven for 10-15min when the problems start. RPM drop also is not consistent, sometimes when I brake or roll down the window I do not get above symptoms and sometimes I do. I also do not have any error code and my radio is the original radio, the car has a manual transmission.
Any help at this point will be greatly appreciated.