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Power Strokes 1994-1997 General Technical discussion of topics related to vehicles powered by the Power Stroke engine in 1994 through 1997 models.

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Old 10-27-2007, 10:17 PM   #1 (permalink)
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engine runs rough when cold

On cold mornings after i crank up and begin driving the engine almost seems like it is running out of fuel and does not rev smoothly. After it is warm it does not do it. It only does this for maybe 10 min off and on, then it quits. Thanks in advance for any input!
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Old 10-27-2007, 10:26 PM   #2 (permalink)
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Re: engine runs rough when cold

GO DAWGS!!!!!
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Old 10-28-2007, 08:30 AM   #3 (permalink)
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Re: engine runs rough when cold

It could be the normal operation of the exaust back pressure valve, that is used to help heat up the motor faster, it makes it feel like the motor is holding back....
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Old 10-29-2007, 03:49 PM   #4 (permalink)
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Re: engine runs rough when cold

It's more like a sputter and the engine does not run smoothly when accelerating . But as soon as it a little warm it does not do it. The EBPV would be more constant and result in a hissing sound...correct?
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Old 10-29-2007, 07:22 PM   #5 (permalink)
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Re: engine runs rough when cold

Correct...

How old & what weight oil do you run?....
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Old 10-29-2007, 10:59 PM   #6 (permalink)
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Re: engine runs rough when cold

I change my oil every 5000 and use Delo 400 (10W-40) I still have about 2000 mi left before next change.
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Old 10-29-2007, 11:49 PM   #7 (permalink)
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Re: engine runs rough when cold

When is the last time that you chnged your fuel filter? As the fuel is thicker when cold it may have more trouble getting past a partially clogged fuel filter...?
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Old 10-30-2007, 06:59 AM   #8 (permalink)
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Re: engine runs rough when cold

I change it every time I change my oil.
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