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6.4L Power Stroke Diesel Engine fitted to 2008 - 2010 F250, F350 and F450 pickup trucks and F350 + Cab Chassis

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Old Apr 1, 2013 | 09:01 PM
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No power

Ok , new problem , when the engine is cold it runs great . However when it gets up to operating temperature huge loss in power . Transmission is downshifting but a normal hill ( unloaded ) it will drop 10 mph with pedal to the floor . Any thoughts without scanning codes ?
 
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Old Apr 1, 2013 | 09:19 PM
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is it stock with the DPF filter on the truck? do you know if it is trying to regen all the time?
 
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Old Apr 1, 2013 | 09:24 PM
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It is all stock , 115k , just had new radiator and thermostats put in with a refash of computer . When I first got it back from shop it when into regen 3-4 times a day , now it seems like its about once a day .
 
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Old Apr 1, 2013 | 09:32 PM
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Also , no trouble codes showing on dash . The fuel filters have not been drained or replaced
 
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Old Apr 2, 2013 | 04:46 AM
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Originally Posted by Btoddsmith
Also , no trouble codes showing on dash . The fuel filters have not been drained or replaced
You answered your next move I believe, time to replace those fuel filters, use only Ford filters, aftermarket just aren't the same.
 
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Old Apr 2, 2013 | 07:52 AM
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No wrench light or check engine light?

Check those filters...replace them.
 
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Old Apr 2, 2013 | 09:42 AM
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No wrench light or check engine light
 
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Old Apr 2, 2013 | 05:22 PM
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Just drained water . Will pick up motorcraft fuel filters in morning and replace .
 
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Old Apr 2, 2013 | 08:00 PM
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From: Redford, Mi.
Originally Posted by Btoddsmith
Just drained water . Will pick up motorcraft fuel filters in morning and replace .
That's a step in the right direction, hopefully it takes care of some of your issues.
 
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Old Apr 5, 2013 | 03:54 AM
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Filters didn't help , I guess it's time to hook up to computer .
 
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Old Apr 9, 2013 | 11:33 PM
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Got two codes : one was exhaust pressure sensor "a" and the other was egr valve . My question is , Is there a possibility that one of these is causing the other ? I bought exhaust sensor but don't want to put on if egr valve is going to mess this one up . Any thoughts ? Mine is also " making oil " .
 
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Old Apr 10, 2013 | 03:29 AM
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Can you list the exact codes? From what I've observed, when the engine is cold, the EGR is normally shut.

Have you allowed regen to finish completely?
 
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Old Apr 10, 2013 | 04:06 AM
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I will get exact codes . When its cold it runs fine so that would reaffirm the code I got for egr . Could the exhaust pressure sensor be giving egr wrong msg ?
 
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Old Apr 10, 2013 | 04:56 AM
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exact code numbers would help. I think the exhaust sensor would be the best start.

You also need to be monitoring your regens. Not letting them finish causing fuel in the oil.

Follow a 5K oil change schedule as well.
 
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Old Apr 10, 2013 | 07:10 AM
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How often is it suppose to go into regen , this is my first power stroke and I have no manual , thanks
 
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