Potential Issue with my 7.3 - Ford Powerstroke Diesel Forum

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post #1 of 5 Old 07-08-2014, 07:17 AM Thread Starter
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Potential Issue with my 7.3

Hi there Everyone! My name is Tony and I am new to the forum! I am searching out some thoughts or someone who has had a similar issue with their 2000-2002 Ford F250/350 7.3.

I have a 2002 7.3 F350...completely stock...that has started making an unusual noise when decelerating...about 30 MPH and around 1400 RPMs. It sounds like someone is using a grinder against some tile or grout. I know that is a funny comparison...but the closest description I could come up with. You can't hear it too much with the windows closed and it is intermittent. Everything else is running 'normal'; oil pressure; temp.; tire pressure; power; etc.. You can really hear the noise if you are driving next to a sound wall or other natural barrier.

Thanks for any advise or help you could provide! Looking forward to learning more on this Forum!
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post #2 of 5 Old 07-08-2014, 07:43 AM
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Check the compressor wheel on the turbo. If that's ok check the brake pads.
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post #3 of 5 Old 07-08-2014, 11:52 AM Thread Starter
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Will do! Thanks for the info thus far! I have narrowed it down that the noise shows up 99% of the time when I pass through 30/31 miles per hour. It disappears anytime other than that. Tire/Road vibration? I can't get it to duplicate at any RPM while stopped...
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post #4 of 5 Old 07-10-2014, 01:41 PM
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Mine did something similar for a while and it turned out to be the sticky weights (used by tire shops to balance tires) on the inside of my rim got put in the wrong place by the shop I had balance my tires and they were rubbing on the back of the caliper. I took it back and had them move the weights and re-balance the tire and problem solved. It’s also possible a u-joint is starting to go bad. Other than a visual inspection I am not really sure how to tell if one it going bad or not…maybe someone else can chime in and let you know how to tell for sure if one is going bad?
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post #5 of 5 Old 07-12-2014, 01:56 PM Thread Starter
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Thanks...

Thank you both again for the information. Have checked a bunch of things...and my buddy suggests we put it on a rack (secured) and put it in drive and run it to 30 MPH and see if it replicates again. Of course, we are going to do this at our local diesel mechanics place. Nothing else has panned out thus far...
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