Dano987

I have a question. My 2017 2.4L 4cyl Journey would not start on day after driving around for about 30 min and parking for about 20. Nothing would come on, no lights, chime, nothing. Had it jumped and it started, but would die unless I kept RPM's up or was actually driving. As soon as i would stop and was unable to shift to neutral to rev engine, it died again. Figured it was the alternator, as I have had similar issues on other vehicles. Got alternator replaced, and it is still doing the same thing. Battery seems ok, but I don't have a way to test without towing the vehicle somewhere. Any advice or input?