Dont know if this shoud go here, but here goes anyways. I have a pretty good condition '88 nissan sentra, has about 60,000 miles. Recently i hooked up an aftermarket cd player, small 250 watt amp and i was running two 10 inch subs on it, it all worked fine for about 6 months, but recently my alternator went bad and my dad replaced it, i thought maybe the amp and the subs were the culprit so i uninstalled the amp. Recently i had noticed that when im driving and i hit the brakes the radio would shut off and then turn back on, whats wierd is that it will not shut off everytime i hit the brakes, only sometimes. Any ideas on what the problem might be, i have alot of time to fix this since im not driving my sentra right now, its kinda messed up. It heats up in seconds and the car will shut off pretty quickly, i think my dads friend said it was one of the head gaskets. But thats a whole other problem that my dad will take care of soon enough.