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Discussion Starter · #1 ·
I’m traveling for work today and about 30 minutes ago this sound just popped up out of nowhere. I was traveling on a 65 mile an hour highway with the cruise control set at 70 and the sound did not slowly come on it was instant.

Sounds like an exhaust rattle and hopefully not the catalytic converters. From inside the truck I can hear the sound coming from the left and right side. Just as the noise starts to happen I will hear it come on one side of the truck before the other and when they go away is the same thing they don’t both go quiet at the same time. There’s only a half a second or so between the two noises starting and stopping and both noises sound exactly the same just one on the left and one on the right.

 

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Discussion Starter · #2 ·
I’ve had three people watch the video so far but nobody has an idea yet what this problem is. I’m an hour or so away from home and I’m going to put the truck on the lift and let it cool down and hopefully I’ll find an answer fairly quickly.
 

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Discussion Starter · #3 ·
One other bit of information that may be normal or not is the boost level. Max boost in stock tune will only go as high as 13.8. This is not something I watch all the time so I can’t remember if that’s normal or not but it does seem a little bit low.

The 13.8 was seen in the video and recently going up a long steep grade I put the pedal to the floor and it stayed at 12.0 most of the time but then it jumped up to 13.5 but no higher than that. The truck still seems to drive perfect and have good power and no warning signs whatsoever other than the noise.
 

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Discussion Starter · #10 ·
I bet you are right on. (beware me agreeing with you. That may not bode well)

I will say the title of your thread threw me thow. That nasty misbehaving IWE sound isn't so much a rattle as it is a clicking, and then can advance to a grind.

Regardless, doesn't feel win win when the solution is 10 bucks!?

Sent from my SM-N950U using Tapatalk
It didn’t sound llike hubs grinding to me either. Sounded like an exhaust heat shield rattling violently. I’m guessing because it was happening while going fast it sounded different. It never would happen while driving slow because there was some engine vacuum holding the hubs open. I assume that’s what’s going on but I just made another stop and I have probably been another 60 or 70 miles since last report and still have no issue.

I kind of like the way the title is worded because this could happen to someone else and hopefully they find this thread.

Thanks guys
 

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Discussion Starter · #13 ·
I heard the same rattle today driving back from Kentucky and last time I bought a check valve I bought two. So sure enough I pulled over and changed the check valve and the noise went away. The check valve that I removed I can blow through both sides.

I reckon it’s time for me to order a couple more.
 

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Discussion Starter · #21 ·
I’m sorry to revive an old thread but did the check valve really solve the rattling noise guys were experiencing? I’ve experienced what sounds like the exact same noise in my 2017 F150 3.5 EB truck. I have had it looked at by Ford but they weren’t able to diagnose what was causing the noise since it was intermittent and only happens once and a while then goes away, and couldn't be replicated.

This truck only has 7,057 miles.

I also found this TSB today:

And just today my check engine light just came on, was wondering if by chance they could be related.

Scheduled an appt with Ford just want to be prepared when I go in.

Thanks
The above fix for sure resolved the problem and it never came back. Why did it happen a couple times?....I don’t know.
 
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