Bucking and missing issue - Ford Powerstroke Diesel Forum
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post #1 of 2 Old 07-01-2019, 06:54 PM Thread Starter
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Bucking and missing issue

Hey guys, I'm in urgent need of some help. I've got an 09 f250 with the 6.4, the truck starts right up and idles smooth and runs great until you start getting into the throttle and then it starts bucking. It stops as soon as you let off and keeps running great as long as you're light on the throttle. Fuel filters have just been replaced, the low pressure fuel pumps have been replaced, and theres no evidence of metal in the fuel system so I'm not leaning towards the hpfp. Also, I'm not getting any codes so any help or wisdom would be much appreciated
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post #2 of 2 Old 10-18-2019, 06:45 PM
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My 6.4 started doing the same thing. But I will end up getting a P1557 code. Have you found out what was causing it?
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