Big *** knock in 6ltr - Ford Powerstroke Diesel Forum
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Old 09-24-2013, 02:40 AM
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Big *** knock in 6ltr

I've had the truck for approx. two months. Prior to, started great no problems . Left the truck sitting for the last couple of days , Started up yesterday morning was approx. 48 F outside , took about 5 -6 cranks to turn over , then a huge knock for about 20 sec's then back to running fairly smoothly.. this is a first time experience with this knock.. any input?
2006 f350 6ltr 234K
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Old 09-24-2013, 02:46 AM
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Hmmm that could be a lot of things any codes smoke anything ?
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Old 09-24-2013, 02:49 AM
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no codes,, I'll check this morning when I start it up for smoke and if the knock persists. its a little early here 4;49am,. don't think the neighbor would appreciate me.. get back to you
thnx
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Old 09-24-2013, 03:23 AM
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id guess a bad injector or two , need to start by checking for codes , check ficm voltages and then have a legitimate cylinder contribution test run when engine is cold to verify which injector it is
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Old 09-24-2013, 05:08 AM
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Agreed^^^^^^^
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