For any who may care for an update. Here is my story, and I am sticking to it. I have had several new vehicles in my 63 years of driving, along with my share of recalls and minor warranty issues. But this one really surprised me. The initial symptoms are described in my first post, and the culprit was found to be a problem in the wiring harness going to the injectors, a relatively quick fix. However while the mechanic was diagnosing this he heard an abnormal sound coming from the automatic transmission. It turned out to be from a defective idler gear, and when he examined the fluid, he found brass grit. And this with just over 300 miles from new. The only fix the dealer was happy with was a complete transmission replacement. That was done and I picked up the car yesterday. Just drove it home and parked it in the garage, so it will be next weekend before I can drive it enough to satisfy myself that all is now normal. But, so far I applaud the dealership for going this route in lieu of just replacing parts and a fluid flush.