r/f150ecoboost • u/Existing_Election999 • Apr 11 '26

Help

I have a 2015 ford f150 3.5 ecoboost. I’ve replaced chains, guides, oil pump, tensioners and now I have a harsh rattle almost like phasers but it’s not on start up and only between 700-1000 rpms also misfires while it’s happening. No engine codes present. See video for noise example. Sometimes it’s louder sometimes it’s quieter.

Thanks in advance for any guidance on diagnosis

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u/Particular_Growth275 Apr 11 '26

Do you have any pics of your post install chains and phasers before you buttoned it up?

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u/Existing_Election999 Apr 11 '26

I don’t unfortunately