TJ82 Boost will increase greater under load and it is not that dependent on RPM. An empty truck can get the rpm to 3000 and only have 8lbs boost yet a loaded truck can boost 25lbs at 1900.

 

First, this is a function of cruise control, speed, grade, and poor engineering application. This pass starts around 4500 feet, and tops out at 6900 feet. Not high in elevation, but sufficient to provide a grade that causes problems. Entering the grade, I am usaully @ 75-80 mph. Due to curves, I need to slow down to about 65-70 early to negotiate them. Then a long straight at fairly steep grade, where the truck is accelerated back up into the 75 mph range. Then, we go into the large sweeping "s" turns where posted speed is 45, and I will slow to about 50-55 depending on road conditions. Then the road is a series of gradual turns for the next several miles, and I accelerate to 60-70, engage cruise, and let the electronics "controll" the truck. We all know that ford did such a great job of designing and programing this computer, it can drive the truck much better that I or any mere mortal ever could. But, It is in this section that the truck starts bucking and stuttering.

So, If ford dosn't believe this is the correct rpm to drive this truck at, they should reprogram the shift points. Correct the problem to eliminate the condition.

As far as the EGR modification is concerned, that may be the modification the engineers talked about they knew would correct the problem, but then it would not be in compliance with emissions standards. This is only a guess on my part!!!

Since finding this out, I have been watching my tach closer when accelerating and feeling this chugging. Agian, it is always in this same RPM range. Now to get it fixed.

 

John this is one of those situation, you would benefit form a SC1704 and how it helps the shifting.

 

It seems that most 05 owners have the same studder when approaching an incline. I called the local Ford dealer service department and they havent heard of this issue. $40,000 and you get a truck that comes with a miss. I had my 03 bought back and waited a model year and still having problems. May have to go to the dark side. Sorry just venting.

 

J, does your problem happen only in overdrive?

 

For anyone with a truck that is bucking and jerking on climbing a hill, there is a solution. It is more prominent under a load (trailer) and with the cruise control on. I have a 2004 F250 that has been in shop between 10 to 12 times (lost count). Service department replaced EGR, Turbo, ECM, several solenoids on engine and transmission with no results. Ford Rep's have been on it twice and no fix. Finally the Navistar expert came to rescue. He found that one or both of the 'High Pressure Oil Rail' had a defective check valve. Other than this problem, the truck is wonderful, no other complaints. I believe this device is under the valve cover and runs along the top of the heads, part of the control for the fuel injectors. Hope this helps some of you with the same problem.

 

Thanks for the info lclark.

And BTW: Welcome to FTE...always nice to see yet another Texican on line here.

Although...a certain moderator who will remain nameless (but, his site ID is Tim Lamkin ) may be getting a little nervous about so many of us being here. Getting the jitters about us ceding form the union I think.
Forever Texas Enthusiast

 

Just a thought from one of the 6 spd guys, but the stutter sounds similar to what happens if I let the revs drop to low (15- 1,600 rpm) while towing. (When a case of brain fade hits), it feels like the motor is going to rip right out of the truck. This wakes you up in a hurry. Could this be a transmission shift point problem instead of an engine problem?

 

Just curious... has the group every found a solution to this stutter problem? New flash updates or anything?? Will a chip help?

Thanks.

 

Holy geez! Under what pile did you find this?

 

Old thread was the only one with solid answers. I have been arguing with the local Ford dealer and was tired of the excuses, so I started looking online. This is a GREAT board for Ford trucks! So, anyway, I thought that maybe over the last few years, you guys might have found a solution to this issue. Someone mentioned a new flash update and one user mentioned a chip that would better control the RPM's. Anyway, I have an '05 dually that we use to pull a large horse trailer. I just freaks me out when it stutters up inclines. Makes me feel like I am doing serious damage. In addition, my wife says "Oh GOD!!" every time is happens, so that gets REALLY old on an 8 hour trip.

Any input on new updates for the situation would be much appreciated.

Ryan

 

Maybe these apply ..............

Vibration/Hop at 40-48 MPH, Trucks with Trailer Hitch:
Some 2005-07 F-Super Duty trucks with long wheel base (over 156") may exhibit what is described as a hop on smooth or coarse road surfaces. Although Ford considers this to be characteristic of trucks with a GVW of over 8500 pounds, some drivers may be more sensitive to the condition. There is a damper kit (P/N 5C3Z-5D008-A) available to correct the hop under the described conditions. It will not correct shimmy, harsh ride or vibration after hitting bumps. TSB #07-5-11.

2005-07 Bucking/Jerking when Towing:
Trucks that exhibit a bucking/jerking sensation at steady speeds in tow/haul when towing large/heavy gooseneck trailers that typically goes away when the accelerator is completely released or depressed fully, and does not occur when using the cruise control, may be caused by movement of the driver's foot after hitting a bump in the road or transmission upshift in combination with the particular trailer load. There is a revised computer program to make the computer less sensitive to minute accelerator pedal inputs. If reprogramming does not resolve the issue, the problem may be due to the hitch, the trailer or the loading of the trailer. TSB #07-6-9.

Shudder on Acceleration:
On trucks with single driveshafts, check the rear axle spacers. If the spacers are installed with the thin side (1 7/8") facing forward, they should be reversed (swapped left to right) so the wide side (2 1/4") faces forward. If the truck now only shudders with a load, swap out the spacers with 2" flat ones from an F250 long wheel base (two-piece driveshaft), P/N 2C3Z-5598-PA.

2003-05 Various Running Problems, Check Engine Light; New EBP Sensor:
Trucks built before 1-17-05 that exhibit buck/jerk, hesitation, lack of power, stalling, stumble, black smoke, surging, rolling idle, changes in engine sound at idle or when driving at a steady speed, or with the trouble codes P2263 or P0299, may have an exhaust backpressure sensor signal that is incorrect or erratic. A revised EBP sensor is available if this is found to be the case. Part number 4C3Z-9J460-A. Broadcast Message 3815.
Normal EBP signal reading should reflect atmospheric pressure with the key on/ engine off. Typically, this is 14.7 PSI/0.88-0.9 volts at sea level, decreasing one PSI/0.10 volt for every 2000 feet of elevation. It should be within 0.5 PSI of BARO and MAP sensor pressure signals.

F350 DANA 80 Dually Rear Axle Chatter on Turns:
Ford now recommends using 75W-90 gear lubricant along with 8 ounces of friction modifier to correct and prevent a chatter condition on turns. If chatter is slight, this can be a normal operating condition. If chatter is still severe after replacing the fluid, disassemble the differential assembly and replace the clutch pack, P/N 3C3Z-4880-AA. Prelube the clutch friction plates with friction modifier before assembly.
TSB #04-16-04

<TABLE style="WIDTH: 576pt; BORDER-COLLAPSE: collapse" border=0 cellSpacing=0 cellPadding=0 width=768 x:str><COLGROUP><COL style="WIDTH: 576pt; mso-width-source: userset; mso-width-alt: 28086" width=768><TBODY><TR style="HEIGHT: 12.75pt" height=17><TD style="BORDER-BOTTOM: windowtext 0.5pt solid; BORDER-LEFT: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent; WIDTH: 576pt; HEIGHT: 12.75pt; BORDER-TOP: windowtext 0.5pt solid; BORDER-RIGHT: windowtext 0.5pt solid" class=xl25 height=17 width=768>Steering vibrating when accelerating - rear U Joint</TD></TR><TR style="HEIGHT: 12.75pt" height=17><TD style="BORDER-BOTTOM: windowtext 0.5pt solid; BORDER-LEFT: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent; WIDTH: 576pt; HEIGHT: 12.75pt; BORDER-TOP: windowtext; BORDER-RIGHT: windowtext 0.5pt solid" class=xl24 height=17 width=768>http://www.thedieselstop.com/forums/f23/2006-f-350-steering-vibrates-when-accerating-198667/</TD></TR></TBODY></TABLE>

<TABLE style="WIDTH: 576pt; BORDER-COLLAPSE: collapse" border=0 cellSpacing=0 cellPadding=0 width=768 x:str><COLGROUP><COL style="WIDTH: 576pt; mso-width-source: userset; mso-width-alt: 28086" width=768><TBODY><TR style="HEIGHT: 12.75pt" height=17><TD style="BORDER-BOTTOM: windowtext 0.5pt solid; BORDER-LEFT: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent; WIDTH: 576pt; HEIGHT: 12.75pt; BORDER-TOP: windowtext 0.5pt solid; BORDER-RIGHT: windowtext 0.5pt solid" class=xl25 height=17 width=768>Driveline hop at 45-50:</TD></TR><TR style="HEIGHT: 51pt" height=68><TD style="BORDER-BOTTOM: windowtext 0.5pt solid; BORDER-LEFT: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent; WIDTH: 576pt; HEIGHT: 51pt; BORDER-TOP: windowtext; BORDER-RIGHT: windowtext 0.5pt solid" class=xl24 height=68 width=768>Carrier bearing. My truck hopped on two different sets of tires. One fine day, my carrier decided not to "carry" anymore. Total failure of the rubber and slide bearing thingy. Well a new carrier bearing and Ujoints fixed the problem. Also the driveshaft shop installed a grease fitting on the slide splines. Totally greaseable parts and rebalanced everything. I am not sure which of these things fixed my hop, but it is GONE!!!!! I grease the driveshaft once a month and everything runs smooth.</TD></TR><TR style="HEIGHT: 12.75pt" height=17><TD style="BORDER-BOTTOM: windowtext 0.5pt solid; BORDER-LEFT: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent; WIDTH: 576pt; HEIGHT: 12.75pt; BORDER-TOP: windowtext; BORDER-RIGHT: windowtext 0.5pt solid" class=xl26 height=17 width=768>http://www.powerstroke.org/forum/general-6-0l-discussion/68555-45-50mph-vibe-woes-2.html</TD></TR></TBODY></TABLE>

<TABLE style="WIDTH: 576pt; BORDER-COLLAPSE: collapse" border=0 cellSpacing=0 cellPadding=0 width=768 x:str><COLGROUP><COL style="WIDTH: 576pt; mso-width-source: userset; mso-width-alt: 28086" width=768><TBODY><TR style="HEIGHT: 12.75pt" height=17><TD style="BORDER-BOTTOM: windowtext 0.5pt solid; BORDER-LEFT: windowtext 0.5pt solid; BACKGROUND-COLOR: yellow; WIDTH: 576pt; HEIGHT: 12.75pt; BORDER-TOP: windowtext 0.5pt solid; BORDER-RIGHT: windowtext 0.5pt solid" class=xl25 height=17 width=768>Death Wobble - front end shudder</TD></TR><TR style="HEIGHT: 12.75pt" height=17><TD style="BORDER-BOTTOM: windowtext 0.5pt solid; BORDER-LEFT: windowtext 0.5pt solid; BACKGROUND-COLOR: yellow; WIDTH: 576pt; HEIGHT: 12.75pt; BORDER-TOP: windowtext; BORDER-RIGHT: windowtext 0.5pt solid" class=xl26 height=17 width=768>https://www.ford-trucks.com/forums/727837-front-end-wobble-culprit.html#post5992828</TD></TR><TR style="HEIGHT: 12.75pt" height=17><TD style="BORDER-BOTTOM: windowtext 0.5pt solid; BORDER-LEFT: windowtext 0.5pt solid; BACKGROUND-COLOR: yellow; WIDTH: 576pt; HEIGHT: 12.75pt; BORDER-TOP: windowtext; BORDER-RIGHT: windowtext 0.5pt solid" class=xl27 height=17 width=768>TSB-05-22-1: Steering Wheel Oscillation</TD></TR><TR style="HEIGHT: 12.75pt" height=17><TD style="BORDER-BOTTOM: windowtext 0.5pt solid; BORDER-LEFT: windowtext 0.5pt solid; BACKGROUND-COLOR: yellow; WIDTH: 576pt; HEIGHT: 12.75pt; BORDER-TOP: windowtext; BORDER-RIGHT: windowtext 0.5pt solid" class=xl26 height=17 width=768>https://www.ford-trucks.com/tsb/fulltext/show_article.php?tsb=05-22-1</TD></TR><TR style="HEIGHT: 12.75pt" height=17><TD style="BORDER-BOTTOM: windowtext 0.5pt solid; BORDER-LEFT: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent; WIDTH: 576pt; HEIGHT: 12.75pt; BORDER-TOP: windowtext; BORDER-RIGHT: windowtext 0.5pt solid" class=xl24 height=17 width=768>http://www.thedieselgarage.com/forums/showthread.php?t=4496&highlight=death+wobble</TD></TR><TR style="HEIGHT: 25.5pt" height=34><TD style="BORDER-BOTTOM: windowtext 0.5pt solid; BORDER-LEFT: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent; WIDTH: 576pt; HEIGHT: 25.5pt; BORDER-TOP: windowtext; BORDER-RIGHT: windowtext 0.5pt solid" class=xl28 height=34 width=768>The steering angle is too steep. Dual steering stabilizers will resolve, but make sure you can adjust cambor after installing them. The BDS can not be adjusted, but they can be cut and re-welded.</TD></TR><TR style="HEIGHT: 12.75pt" height=17><TD style="BORDER-BOTTOM: windowtext 0.5pt solid; BORDER-LEFT: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent; WIDTH: 576pt; HEIGHT: 12.75pt; BORDER-TOP: windowtext; BORDER-RIGHT: windowtext 0.5pt solid" class=xl24 height=17 width=768>http://www.thedieselgarage.com/forums/showthread.php?t=68934</TD></TR></TBODY></TABLE>

 

Mark...... you never seem to amaze me. Cudos my friend cudos

 

The answer was in the engineers answer. The fed is limiting emissions on street diesels to the point that puts them into a box when it comes to solving issues. unless they have solved this issue through the tsb's listed above, I would look to an aftermarket tuner i.e. sct custom tunes to fix the "fuel" problem

makes me wonder if the international trucks have the same issues when utilizing the same motors. my rhetorical question has a resoundng "i doubt it" answer

 

All I know is that my 2006 does not have these issues.