If your 1991 Ford Thunderbird can't go over 40 mph, it could be due to several potential issues. Common problems include a malfunctioning transmission, a clogged fuel filter, or issues with the ignition system, such as worn spark plugs or ignition coils. Additionally, a failing mass airflow sensor or exhaust restrictions could limit performance. It's best to have a mechanic diagnose the issue for a precise solution.
Copyright © 2026 eLLeNow.com All Rights Reserved.
