NHTSA Complaint #11672874 — 2021 FORD MUSTANG

My 2021 Ford Mustang EcoBoost is currently experiencing an ongoing issue with the EVAP purge valve, a critical emissions component. The vehicle suffers from stuttering, rough idle, and a check engine light, especially immediately after refueling, where the engine has stalled multiple times—posing a serious safety risk during traffic re-entry and acceleration.The purge valve has not been replaced, and the issue remains unresolved. I contacted Ford Customer Relations and three separate Ford dealerships, all of which refused to service the vehicle under warranty, despite the fact that it is still covered under the federal emissions warranty (8 years/80,000 miles) and the powertrain warranty.This refusal contradicts federal warranty guidelines, as the purge valve is clearly part of the evaporative emissions control system. The failure disrupts vapor flow and fuel trim stability, leading to erratic engine behavior and emissions system malfunction.I previously owned another Ford Mustang EcoBoost while living in a different part of the state, and that vehicle experienced the exact same purge valve issue, including stalling after refueling and triggering the check engine light. This recurring failure across multiple vehicles suggests a design flaw or supplier defect that Ford has failed to address.There are hundreds of documented complaints and videos online, including on YouTube and Mustang forums, showing other owners experiencing the same purge valve failure and warranty denial. This suggests a systemic issue that Ford is aware of but continues to ignore.I believe this issue warrants investigation for warranty non-compliance, emissions system reliability, and potential recall consideration due to the safety and environmental risks involved.