car nut 101

I installed a after market radio into a 99 chrysler town and country , it did not have a radio at all in it,, It has the infinity sound system from the factory witch means it has a factory amp,, I hooked it up and works great until you try to turn it up load then the amp starts kicking on and off,, I am a certified tech and I know how to hook a radio up, So no stupid answers,, Like i said it plays good on low, but put a song or cd in that makes some base and it kicks on and off,, Has anyone ran into this problem before,,, Just curious does the Amp/power antenna wire put out enuf volts to keep the relay on,, Im thinking that it don't and when the base hits the voltage may drop just enuf to kick the relay off,,, ,

I have a dell Inspirion 1525, I paid some moron to put windows 7 on it,But he put me a non genuinen copy on their, and now it has froze my pc I cant even use it without it freezing up,, My question is If i put windows vista back on it can i use the same product key that it came with, I dont have the vista cd that came with it, I"ll haft to get another one,, thanks for your help in advance,,

Im working on a 1990 Model crx, it will start and die,, but if you hold the ignition key down it will stay running,, The distributor has been replaced with a new one, Im thinking it could be the circuits in the main relay , but i don't have the car hear with me to work on it, and its about 100 miles away from me,, It my brother in-laws car, He also is the one who replaced the distributor,,so i don't know if he even installed it correctly or if it was a new or used unit,, Any help is appreciated in advance,, Thanks

I am working on a 98 e350 van,, the rear diff is compleatly gone,, but I need to know what kind of diff it is for a replacement,,, there is no tag on it,,, Any help would be great,