7.3 knocking at idle ? - Ford Powerstroke Diesel Forum
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Old 09-24-2007, 09:04 AM
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7.3 knocking at idle ?

Just purchased a 2000 F-350 about two months ago, just started noticing a knock at idle, is this normal ? Sounds like a gas engine with a rod knock, sounds ok when above idle. Only have 82,000 miles on it, and dont believe its been run hard. Thought maybe it was a fuel issue and started adding fuel suppliment doesn't seen to help
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Old 09-24-2007, 01:10 PM
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Send a message via AIM to southern7.3
heres a bump for ya
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Old 09-24-2007, 01:23 PM
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have you put a new fuel filter in?
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Old 09-24-2007, 01:29 PM
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Might be cackle - Shane aka SEA71 has a sound clip around here somewhere that you might be able to compare it to.
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Old 09-24-2007, 01:31 PM
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I have a few vids if you can make it out.

Run a search for Cackle as Marty said.
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Old 09-24-2007, 01:51 PM
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Check for blow by. We had a '99 that I thought had cackle case, but it had lost #5 cylinder. If I had only removed the oil cap....

Hope it's cackle.
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Old 09-25-2007, 09:39 AM
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Thanks for the info, I researched "CACKLE" and found a sound bit, I think they were at my house recording it! I'm going to pick up a new fuel filter tonight and see if it helps any, haven't changed that yet. Thanks for the help, been driving pickups for 30 years but this is my first diesel, wish I wouldn't have waited so long, I'll never go back to gas!
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