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knocking issue

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Old Nov 22, 2014 | 04:54 PM
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knocking issue

Hey guys I'm in need of some advice, I just got a 2003 f250 5.4 triton and it has a terrible knock. I've hear of the cam phaser problems but this thing knocks at high rpm and at idle so I doubt it would be a phaser, I thought it could be a rod bearing but I'm not losing any oil pressure. Its a pretty loud knock and it gives me headaches if you happen to know or have an idea what it is I'd really appreciate it, I don't have money for a mechanic to diagnos it...
 
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Old Nov 22, 2014 | 05:01 PM
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Doesn't necessarily lose oil pressure for a bad rod bearing.
 
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Old Nov 22, 2014 | 05:06 PM
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Well I'm going to take out the boil filter tomorrow and check for metal shavings, I can hear the knock right under it and from the engine bay so I have no damn clue what it is, could it be a stuck valve? It feels a little sluggish when i hit the throttle?
 
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Old Nov 22, 2014 | 06:46 PM
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Without being able to see it in person anything would be just a guess.

On old school, we would just pull one plug wire at a time and see if the knocking would lighten up on one cylinder and that would be an indicator that that cylinder was the one knocking. I guess you could do the same by unplugging one coil at a time.

Everything you describe could be attributed to a rod bearing knock though.
 
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