chugging at 50+mph - Ford Truck Enthusiasts Forums



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chugging at 50+mph

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Old 07-28-2011, 10:46 PM
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chugging at 50+mph

2004 F350 6ltr runs strong, excelerates strong but when getting up to 50 + truck starts to chug pretty bad. If I let off of the gas it seems to stop, if I excelerate past 60 it seems to stop. I am leaning towards the transmission or possibly the converter going bad. Anyone else have this happen?

**new FICM and 4 injectors have already been replaced.
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Old 07-28-2011, 10:48 PM
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Moved to the 6.0L Powerstroke Diesel forum.
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Old 07-28-2011, 11:58 PM
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Sounds like a bad injector. That is exactly what mine did when my #4 died 2 weeks after being replaced. New injectors can fail.
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Old 07-29-2011, 12:12 AM
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You had the chugging at cruising speeds? If i stomp on the pedal it ran like a son of a biscuit and at over 70 it seemed fine.
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Old 07-29-2011, 12:30 AM
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have you scaned it for codes
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Old 07-29-2011, 12:39 AM
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no codes stored. last code retrieved was a iat sensor gone bad that was a month ago, no mods. Only thing done is 4 new injectors, egr, 2nd icp and ficm
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Old 07-29-2011, 07:34 AM
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possibly sticky turbo vane actuation.
is the programming stock or are you running aftermarket tuning?
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Old 07-29-2011, 11:59 AM
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Originally Posted by Benchwrench View Post
possibly sticky turbo vane actuation.
is the programming stock or are you running aftermarket tuning?

great advise!!
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Old 07-29-2011, 12:02 PM
mblanken881 mblanken881 is offline
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is the motor chugging or is the truck kind of vibrating or lurching? mine does the same kind of thing right at 50 MPH but mine is a bad carrier bearing.
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Old 07-29-2011, 05:17 PM
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The programming is stock for now. I thought about the turbo to and start to play with it. I disable the vgt. Still had the same problem. @mblanken it is kind of hard to explain. I use the term chugging cause that is how the misses describes it.It is almost like it is bucking. I have had a carrier bearing go. Does feel like that.
I was leaning towards tranny thinking maybe the converter is not locking up or slipping some how.
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Old 07-29-2011, 09:09 PM
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I would also suggest sticky turbo. Just had mine cleaned and now runs better than new!! I had underboost codes and chugging at slower speeds. Try cleaning the turbo an see wat happens.
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Old 07-29-2011, 09:58 PM
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chugging at 50+mph

I had the same problem on my 2004 F250 CC, after I ran the codes I found that #7cyd had a continuity imbalance . I replaced the #7 injecter and solved the problem. Good luck.
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Old 08-10-2011, 10:06 PM
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Just wanted to thank everyone for their help. It turned out to be number 1 injector. 2 hours later I was hauling ***. Thanks again. Now to install my SCT livewire. Cant wait to see how that works with my 39 foot fifth wheel.
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Old 08-10-2011, 10:12 PM
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looks like you nailed it Jim

thanks for coming back and posting the out come this will help others
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Old 08-11-2011, 01:12 AM
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Haha bucking our chugging at 50 mph. Seems to be injector related 9 times out of 10 in my limited experience.
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2007, 50, 60, 60l, 67, 70mph, chugging, diesel, f150, f250, f350, ford, mph, stumble, transmission

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