7.3 Intermittent Knocking - Ford Powerstroke Diesel Forum
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  #1  
Old 01-04-2009, 08:31 AM
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7.3 Intermittent Knocking

I notice a few days ago that there is an intermittent knock when my truck is running. I heard it loud and clear yesterday when I was idling at a stop light. It will idle real smooth and normal then it will knock two to three times then go away. The RPM's don't fluctuate when I hear the Knock either. I only have 250K on the ticker so I'm hoping it's not a main or rod bearing or wrist pin going bad. Anybody have any ideas?
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Old 01-04-2009, 09:44 AM
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could be water in the fuel put some fuel treatment in it. I thought my John Deer 250II skid steer spun a bearing with a 100 hrs on it and it was water it sucked up it was knocking like crazy for a few seconds and then it would quit. Only guess I have Hope it is not anything bad. good luck.
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Old 01-04-2009, 10:29 AM
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I'll check my fuel filter, but the "water in fuel" light hasn't come on
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Old 01-04-2009, 10:29 AM
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Anybody know if it could be an injector?
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Old 01-04-2009, 10:32 AM
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do an oil change see if it makes a difference, mine always runs better for a few months after i change the oil
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Old 01-04-2009, 10:34 AM
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Quote:
Originally Posted by rffpsvb View Post
do an oil change see if it makes a difference, mine always runs better for a few months after i change the oil
That isn't the problem. I just did an oil change less than 1000k ago with Amsoil oil and filter, it's all I've been running in my rig for a few oil changes now.
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Old 01-04-2009, 01:44 PM
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Old 01-04-2009, 06:04 PM
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Another bump for my problem
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  #9  
Old 01-04-2009, 09:12 PM
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bump, bump, bump
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  #10  
Old 01-04-2009, 09:15 PM
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My moms 7.3 did this and went away. Lasted for about 1K miles.
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