Nothing at all this car is bone stock from the factory. I traced the ground side, it comes from the ignition control module then from the coil it goes to the engine management module. Maybe the management module is bad and causing a short which in turn is causing a higher resistance than it should. I have replaced the following, distibutor,pickup coil,ignition coil,ICU,plugs,plug wires,distributor cap and rotor, all of which needed replacing anyway. The only other thing I can think of is I got the wrong coil and it has an internal resistor which with a electronic ignition it should not. but even so I should get better than 4 volts when running.