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Old 04-24-2012, 09:19 AM   #21
shovelhead86
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Love my 2011 Ford truck. It just seems to love to pull. Even after DW has the trailer packed!
 
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Old 04-24-2012, 10:23 AM   #22
pineranch
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Question, I've noticed a delay when starting out and making a turn. It is comparable to a carburated vehicle with a bad accelerator pump. Any 6.7 owners got any ideas. Taking it in next week for first oil and fuel filter change. It has 5100 miles.
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Old 04-24-2012, 02:53 PM   #23
mlh
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Mike that sounds like the time it takes the turbo to stool up. The 6.7 is equipped with a relatively small turbo and will stool up quick as far as diesels go, but it still takes some time. and adding to the problem to control soot it hast to have enough boost to burn the fuel before it can supply fuel. The less soot it makes the less regens you have. So you are left with hesitation. If you think yours is bad try a 6.4.
I,m not sure this is what you are talking about because you say starting out and making a turn.
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Old 04-24-2012, 03:07 PM   #24
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I have talked to many owners of the 2011 and the 2012 F 250 ,F350 and F450 and all say at slow speeds it hesitates. on start up under 20 MPH. Ford will get it rite some day . But when hauling no hesitation . sailer
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Old 04-24-2012, 03:51 PM   #25
mlh
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There is no way to stool up a turbo instantly. The bigger the engine the bigger the turbo has to be and the longer the hesitation. You can help by having more than one turbo. That is why high preformance sport cars have several up to 4 turbos and that is why Ford put 2 turbos on the 6.4 and 6.7. The 6.4 has large turbos stool up slow but they can supply enough air for up to 350 extra rear wheel HP. The 6.7 turbos are smaller, stool up faster but are only good for about 200 additional rear wheel HP. This is why the 6.7 doesn't perform very well at high altitude but is a great performer at normal altitudes. At high altitude it cant get enough air, small turbos. It is all a compromise.
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Old 04-24-2012, 03:54 PM   #26
Jay Bird
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Sailer. I had my 2011 reprogramed and it does not hesitate anymore.
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Old 04-24-2012, 04:34 PM   #27
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Hey John, you have to keep it under "80" if you want good MPG. LOL
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Old 04-25-2012, 05:40 AM   #28
2007dura
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Quote:
quote:Originally posted by mlh

There is no way to stool up a turbo instantly. The bigger the engine the bigger the turbo has to be and the longer the hesitation. You can help by having more than one turbo. That is why high preformance sport cars have several up to 4 turbos and that is why Ford put 2 turbos on the 6.4 and 6.7. The 6.4 has large turbos stool up slow but they can supply enough air for up to 350 extra rear wheel HP. The 6.7 turbos are smaller, stool up faster but are only good for about 200 additional rear wheel HP. This is why the 6.7 doesn't perform very well at high altitude but is a great performer at normal altitudes. At high altitude it cant get enough air, small turbos. It is all a compromise.
Lynwood
I better go back to my dealer as Ford only installed 1 turbo on my 2012 6.7. Here is a linkhttp://www.ford.com/trucks/superduty...ations/engine/to the Ford engine page that shows only a single sequential turbo. You can go to the videos on this link http://www.ford.com/trucks/superduty/ and scroll to 2nd page and it explains the single turbo and how it reduces the lag. And I also thought Ford changed the software to help with high altitude as was shown in the 2nd Hurt Locker testing. On page 7http://special-reports.pickuptrucks....ass-climb.htmlyou can read about this. Finally, I am pretty sure there was a TSB out to program for the hesitiation.
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Old 04-25-2012, 09:51 AM   #29
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I was going to say the same thing re turbo! My truck is a job 2, and there was a software mod associated with that production change that increased the torque; I get great response from the truck, and it starts to move, with the montana, just by taking my foot off the brake. There may be a lag as described, but if I have one, have not noticed.
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Old 04-25-2012, 11:01 AM   #30
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Lynwood,
Great links, thanks for the information.
Mike
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Old 04-26-2012, 02:25 PM   #31
mlh
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It could be called a single turbo or 2 turbos, just depends on which way you look at it.
The following is a quote from Diesel Power.
Lynwood
The Garrett single sequential turbo is a variable geometry unit with twin compressor wheels, twin compressor inlets, and twin turbine inlets, and it uses ball bearings to support the turbine shaft. Engine oil is routed to hydraulically control the variable geometry turbine housing, and a vane-position sensor gives the engine computer real-time data so it can calculate turbine shaft speed


Read more: http://www.dieselpowermag.com/featur...#ixzz1tCALcRNm
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Old 04-27-2012, 02:02 PM   #32
CORattler
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A lag on turbo powered trucks is not uncommon. You can compensate some by starting out in 1st gear with an automatic transmission. If a manual tranny, just raise the rpm higher before engaging the clutch. I agree that the programming is worth checking out.
BTW, do Ford turbos really "stool" up? (Sorry, I couldn't resist)
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Old 04-29-2012, 03:19 PM   #33
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I think the 6.L and the Dodges have them. Sorry I resist either.
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Old 04-30-2012, 03:21 PM   #34
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Well my 2011 is in the Ford Garage now for a recall and the hesitation . They told me they will make it rite. Will know better next week. Dennis ; 80 . I wish . but at 62 towing has only been 10.6 or so as you always said , how can I get it better MPG?????
George ,I hope they find the problem as I feel its all elect ,how 1 thing works then on to # 2 I have had a new starter and a Fly wheel put in mine already 5000 miles, last summer and at the time it went out we were in NC for 2 weeks but was told I had the 1st of the 2011 fly wheel go as 2 teeth were gone and they had to fly 1 in from Detroit . I have a feeling this is a short live truck as I also have tranmission problems as it clunks after I go in reverse , so they are checking on that also..sailer.
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