Working on a car for a friend, she had a shop do a head gasket/tune-up. Car doesnt start now, and was constantly blowing the ign coil fuse under hood when key moved to on position. mechanic said car needed a new wiring harness. went to the junkyard, got one.. still crank no start, but the fuse doesnt pop anymore. Thought maybe the crank position sensor was bad, replaced it. same thing. Thought maybe the ecu was shorted, replaced it with the one that matched the wiring harness from the junkyard. Still nothing. I am pretty seasoned with turning wrenches but this has got me stuck. Any ideas anyone? Thanks.