96 park ave. just dies

if you have to stop quickly car dies
when you go to start it again it acts like a battery cable is loose (checked them) it will just click
but if you turn the key on and leave it on it(not cranking it over)
all the dash lights will click and flicker after about 5 seconds all is normal and it will start
any ideas will be helpful
thanks charlie


96 park avenue 170,000 miles nice ride