Ford Mustang engine runs away on startup, potentially life-threatening issue on Ford Mustang

Submitted by Vehicle Owner · Jun 23, 2025
Published by RepairPal

Problem overview

Some Ford Mustang owners report experiencing serious issues with engine runaway on startup, which can lead to uncontrollable acceleration without driver input. This phenomenon is often linked to faulty fuel pumps, ignition problems, or sensor malfunctions that can hinder the engine's starting process. The risks associated with engine runaway are significant, as they can result in loss of vehicle control and potential accidents. To effectively address this issue, owners are advised to use an OBD2 scanner for accurate diagnostics and to seek the expertise of a qualified mechanic or fuel pump repair specialist. Additionally, checking the battery, alternator, and starter for failures is crucial, as these components can impact engine performance. Prompt resolution of engine runaway is essential for ensuring safety and the proper functioning of the Ford Mustang.

1 person reported this problem
0 comments
Schedule Repair

Ford Mustang vehicles with this problem

0 model year affected

Search for another problem

RepairPal Car Genius

Ask our experts about your Ford.

RepairPal Car Genius™ is a free resource for vehicle owners seeking advice on maintenance, auto repair, shop inquiries, estimates, and finding a trustworthy repair shop in your area.

 Auto Repair Expert Auto Repair Expert

Call us at 877-913-1554

Available 9am – 6pm ET Monday through Friday

Call Our Experts