so i finally put my car back together yesterday and it wont start, i know for a fact that the battery is bad, but it tried to jumpstart it and nothing, it cranks but wont start up, i am getting no spark to my spark plugs, the plugs as well as the wires are both brand new, i am thinking the external coil might be bad but ive never actually seen them go bad, i tried using at test light and i tested the little thing that hooks up to the wire and the light did not go off, so im wondering could the external coil be bad or wat else could the problem be?