Ford has issued a Technical Service Bulletin (TSB) for some units of the Ford F-150, Lincoln Mark LT, Ford Expedition, and Lincoln Navigator SUVs powered by 5.4-liter Triton V8 engines. Affected vehicles may exhibit sporadic rough idle and/or a rattle-like noise while driving, with the check engine light switching on in the instrument panel. The problem involves faulty cam-timing solenoids. The repairs may or may not be covered under warranty.
The problem: affected vehicles may exhibit sporadic rough idle, and/or a rattle noise while driving accompanied by a lit check engine light in the instrument panel. The problem, according to Ford, are faulty cam-timing solenoids, which control camshaft timing and allow the engine to operate at peak power and efficiency at all times. When the solenoids go bad, camshaft timing may get out of order, result in drivability and emission issues.
Affected vehicles: affected vehicles include some units of the following, equipped with Ford’s 5.4-liter V8:
- 2004-2010 Ford F-150
- 2006-2008 Lincoln Mark LT
- 2005-2013 Ford Expedition
- 2005-2013 Lincoln Navigator
The fix: on affected vehicles, Ford dealers will replace both the left and right solenoids. The automaker is managing the TSB by Vehicle Identification Number (VIN). Repairs are covered for vehicles under the new car warranty for those vehicles within the warranty period; repairs for vehicles outside the new car warranty may be covered under the emissions warranty or under an extended service plan.
To note, the repair is labor-intensive and can take up to four hours.
Contacts: more information as well as answers to questions are available by calling Ford Customer Service at 1-800-565-3673 or Lincoln Customer Service at 1-800-521-4140. Reference TSB Number 14-0114 entitled Engine – Intermittent Rough Idle, Rattle Noise While Driving.