I have a 1988 Mazda RX7. I cant quite figure whats wrong with it, It started out if the car was in park it will run, but the minute hit the brakes, the car loses all power and dies. So I thought it was brake lights, switch, or two sensor and I disconnected them all one at a time and that still doesnt stop it from happening. Now if I rev up the engine it dies, or hit the brakes I get the same response. I have already replaced the altenator. So thats not it. Any suggestions as to what to try next?