Surge when warming up, worse after oil change - Ford Powerstroke Diesel Forum
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Old 03-13-2012, 08:35 PM
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Surge when warming up, worse after oil change

My truck for the past couple years gets a chug/surge going on as soon as the temp gauge gets off of cold until it warms all the way up. Gets worse with fresh oil. Any ideas? Injectors, hpop?
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Old 03-13-2012, 08:38 PM
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Also doesnt do it under accel/decel, just while cruising at any speed
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Old 03-14-2012, 10:07 PM
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Did you put any oil additive in there when you did the oil change?
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Old 03-20-2012, 09:13 AM
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you should try changing the oil in the HPOP. theres a fill screw on top of the resivour. use a brake bleeder or some sort of vacume to suck the oil out (it holds about a quart) then fill it and run it for a minute and it will fill with the nasty sludge oil again, do it like 3 or 4 times youd be surprised how much it helps
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Old 03-20-2012, 12:02 PM
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Didn't use any additive this time. Have used lucas before with no change. I will try the hpop oil, thanks
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