eagle mark I have a logical eprom eraser,it will erase any erasable chip, its got a long line just pass 10 minutes that is where I erase at. some of them gm eproms need programed at 25 volts and I think that is what smokes the chips,all the replacement eproms that I have dealt with program at 21 volts.i think the older eprom proggramers had to do with eproms not being useable but 1-2 times.10 -12 minutes earase time seams to work good on the 21 volt eproms. moates electric erase chips is the way to go unless you are tunning custumers vehicales.