A few months ago my car has died when I hit the breaks. And check
light engine was on. I took it to mechanic and they are cleaned
everythings inside and light has gone. I am started to drive my car
and it has died a few times. It's always happening like this:

Only when I hit the breaks and my car is stopped or almost stopped
then RPM drop to 500-600 and the engine turns off by itself. I crank
it and its starts running. Most of the time my car runs smooth. But
runs rough when my car dies and I have to crank this again to keep it
going. Although when I am on highway and don't have to stop, my car is
fine. But I notice one thing when I am using the AC then RPM always
close to 800-1000. And never dies. I took my car again to the shop
when RPM started to jump from 1000 to 1500 and go back to almost 0.
And the mechanic again did not tell me which the problem is.

But today when I crank the car she starts running but after 1 minute
has completely dies. It doesn't make any noise, just nothing! All the
lights are out, I cant close the windows! No alarm light on either. I
have asked my friend to charge my batteries from his car. But still no
help. Car is out.

Who knows what it may be?? Please HELP ME to fix it!!! Or find out
which the problem is?