Hi,
Often, it is an exhaust leak. Does it change with engine speed or engine load? I'm not sure which engine you have, but these trucks commonly develop an exhaust manifold leak that makes a ticking sound.
Check that and let me know your thoughts. Also, let me know if you have already checked for leaks. If it has the 4.6L or the 5.4L, this would be my first suspect.
Take care,
Joe
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Thursday, January 11th, 2024 AT 8:56 PM