Food Safety Report: Wendy's, Custer Road, Plano, Texas, USA 2 years ago • details 15 Comments Comment Suspected food poisoning. Symptoms: Diarrhea Suspected source: Ate at Wendy's in Plano yesterday around 3:30 pm Onset: Less than 4 hours Duration: 12 to 24 hours Additional information: My wife and I both were ill