When I drive the van for a long time and then start it after sitting over night, a very loud whistling noise comes from under the car, not under the hood. It has been happening for a few months now and doesn't matter what the outside temperature is. Today it was over 100F and temps here are routinely over 105 in summer.

During a road trip couple weeks back, fuel filter line ruptured while driving after filling half a tank of gas couple of exits back. Wondering if line burst was a coincidence or was a result of whatever causing the whistling noise.