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Old 10-25-2013, 03:56 PM
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please guys help

so ive been dealing with this ongoing issue of what feel like a miss in my late 99 powerstroke, six speed with 147k on it. ive been replacing thing guessing and checking what could be wrong with it, i recently did the glow plugs in it along with a #8 injector and the camshaft position sensor for the second time in a year. did a buzz test on it alls good in that aspect but its got a lack of power and it acts as if it has a mean lope to it.
i look at my injector pressure while at idle it ranges from the low 500's and jumps up and down between that and the 800s

at around 1200rpms the injector pressure stutters really bad from the 1500's all the way down to the 400s and back up.

the most recent thing ive done is the valve cover gaskets today and wire harnesses. whats next guys? any input would be greatly appreciated as i am stumped.
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Old 10-25-2013, 04:00 PM
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any codes?
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Old 10-25-2013, 04:07 PM
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no, no codes whatsoever.
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Old 10-25-2013, 05:12 PM
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at around 1200rpms the injector pressure stutters really bad from the 1500's all the way down to the 400s and back up
Do you want to explain this? Does the motor miss at these pressures or is the pressure jumping possibly due to a failing HPOP?
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