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2011 Mustang GT automatic completely stock. I’ve been having this noise since around 14k miles. Car currently has 23k miles and has given me no problems, just this noise. At cold start its sounds more like a fluttering or flapping kinda noise as if a leaf was stuck on a fan. Once car is warm it become sort of like a chirping noise. I’ve attached a video below
22k miles 2011 Mustang GT engine noise
 

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That’s the bbq lighter tick. It’s common on all generation coyotes. As far as I know there’s no cure for it but it’s not detrimental to engine health.
 
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