When turning the key to start, the starter will intermittently engage. The transmission cable to put the van in park and some kind of sliding assembly in the steering column has been replaced. ECM has been replaced. Mechanic seems to experience that it starts every time if the key is inserted in the cylinder and left for 30 seconds to 2 minutes. After that it starts 25 times in 25 attempts. This is kicking everybody’s backside…Starter motor itself seems ok. There’s some 5v signal that shows up on the scanner that allows the ignition to recognize the key but I’ve used 4 different keys and they all work when it’s working. There’s no indication of this 5 volts on the dashboard…should there be one? Help!