at the risk of starting the 'Holy Ballast Resistor' war again, i think you should call him and make sure the coil he sold you is a true 12v or is internally ballasted (is that a word?). if its a 9v coil and you run it without a working ballast you will cook it after awhile. and telling me what ohms your meter is reading doesn't help as i don't know what the ballast is rated for. something caused your old ECU to burn out after only 500 miles ..................