6.7L – Thump/Whine/Knock Noise From The Fuel Tank – 2020-2021 Ford F-Super Duty
NHTSA ID Number: 10189776 Manufacturer Communication Number: TSB 21-2057 Summary Some 2020-2021 F-Super Duty vehicles equipped with a 6.7L engine built on or before 10-Feb-2021 may exhibit a thump/whine/knock noise from the fuel tank at idle or during key on, engine off (KOEO). The noise may be more pronounced at fuel levels at or below 1/4 tank. … Read more