Disturbing "rattle" noise coming from engine at different rpm's... - Ford Powerstroke Diesel Forum
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Old 11-30-2013, 09:27 PM
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Disturbing "rattle" noise coming from engine at different rpm's...

Here is the long story, in a short fashion. The FICM went out, which was replaced by "Ed". All injectors tested well within parameters. There are no codes showing thus far. Now, here is where it gets interesting... I have developed a "rattle" that sounds like someone is shaking marbles in a tin can when the truck is at operating temp and under load, at idle at a stop light while in drive, or when giving it throttle to increase speed or to pass. It has even gotten to a point where the exhaust or something is "vibrating" the interior of the cab while at a stop light or when the truck is simply in drive. The "rattle" starts on acceleration at about 1,500 rpm, sometimes going away, then comes back if you give it throttle (just to pass or speed up). I had my wife get in and put it in drive while I started using the scope to listen all around. To be honest, I couldn't pinpoint it anywhere. One thing I did notice is that the exhuast does have a "visible" vibration to it from the tailpipe to the down pipe on the turbo. I had this "rattle" before I had the FICM replaced, oil change, all filters, coolant change, and new batteries installed. The mechanic did notice it but said it sounded like a bracket hitting the firewall or frame. I have combed every square inch and to my eye, I see nothing touching anywhere. Can someone point me somewhere and if so, why would the exhaust have a "visible" vibration on it? If I put my foot on the tail pipe I can feel my foot vibrating.
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