Whenever I take off from a stop or slow to a stop, there's a clunk in the drivetrain. It feels like a bit of play before the drivetrain engages and when it releases...torque converter maybe? Taking to the tranny shop soon...
View 10 RepliesI have an 08 F-250 CC SB 4x4 Diesel truck that has since new clunked when starting out from a stop and/or coming to a stop. I have 16k on it now and am getting really tired of dealing with it... The clunk starting is when I let off the brake and just apply the throttle. It feels like something slips and then clunk.
The clunk when stopping is the same as starting, except when coming to a stop.This is unloaded or when loaded w/ cargo and/or trailers. I know I can go to the dealer, but I don't want to un-spartan my truck for this...
Why are My Tires Wearing Unevenly?
View 2 RepliesI know it seems like everyone's truck tends to have different tolerances when it comes to when it starts and stops regen when it comes to gpl but the last two times my truck has gone into regen it starts at 100% and finishes at 25%. Is it normal to stop regen when it gets to 25% or should it be stopping at 0%. Or could it be that the percentage in my truck is off and it's actually using the gpl to start and Stop? The only thing about that is that forscan says it's supposed to start at 100% which it does so if my percentage is off that would mean it was starting at 75% does it not?
View 14 RepliesI have a'04 f-250 6.0L diesel truck. There are times when i come to a stop that my truck sputters like if it's about to run out of fuel or want to shut off but the tank is full or half. If i am going at a fast pace and then begin to slow down and stop it will sputter.
View 3 RepliesTrying to troubleshoot a very intermittent (has happened on two different occasions during the last 1,000 miles) hesitation from a stop-light. I've been recording engine parameters (Torque application) on both instances as these have been during longer trips after a period of highway driving. 2004 Excursion, 112K miles.
This feels kind of like severe turbo hesitation (4 to 10 seconds trying to start out before it kicks in) but I don't think that's it. The turbo is a new PowerMax turbo replaced 5 months ago. VGT readings seem pretty normal. The EGR valve is new -- the first instance was with the old and the second was with the new. I've also recently replaced the EGR and Oil coolers (before this).
Here's what's interesting in the captured data though... Normally when I coast into a stop-light the indicated engine load stabilizes at about 40-50% and VGT moves to about 65% to 70% at idle. The two different times this happened (actually multiple times at stop-signs/light close to each other over 5 minutes or so for both of these), when I have coasted to the stop, the engine load increases from low values during coast-down (0% during freeway coast-down or 19-30% during other coast) up to 99.6% (or other similar high values) at idle and VGT seems to be full closed at 85%.
There is absolutely no response to the throttle in this situation for 5-10 seconds. I've either been goosing the throttle a bit or putting it neutral and revving it up first to get things going again. When it finally catches and starts accelerating with power, indicated engine load drops to 50-60% again and VGT opens up to 40-60% or so. None of the other parameters I've been capturing seem to read strangely during this that I recognize. No issues observed during cruise and power seems good. No pending DTCs or engine light.
Here's what the data points I'm capturing (once each second):
Boost
Calibration Input Volts
ECT
EOT
Fan RPM
FICM main volts
Fuel Injector pulse width
ICP
ICP Volts
IPR Duty cycle
RPM
Engine Load
MAP
Trans Temp
VGT Duty Cycle
EBP
EGR Commanded
EGR Error
Added today but not captured during these issues yet:
IAT
IAT2
Baro
Accel Pedal Position
Mass Airflow Rate
Mass Fuel Desired
2003 6.0 FX4 w/ Auto Transmission, 180,000 miles
Last transmission service - unknown (I have owed the truck for 3,000 miles). I just acquired a clunking sound when shifting from R to P or R to N. No noise from N to D or lower or back up to D. It does not grind into gear, just clunks one time. It is rather loud.
All shifting while driving is normal, no slipping, or noise. This occurs on level ground, at operating temp, and +-650 RPMs.
Fluid level is okay. No strange odor. What will be the next steps to investigate?
So I took the wife to the pumpkin farm today, and was we were pulling into the grass/mud parking lot, my tires just started spinning. I stopped because I wasn't going anywhere and I turned my truck to go into 4x4(SOTF) and it made this LOUD clunk and then went into 4x4. Everything is ok and I tried it 4-5 after that to see if it would keep making that noise and it did not.
View 14 RepliesI have searched and have found a few threads on various transmission shifting issues. However nothing really pertaining to 13+ trucks that is only happening under certain conditions. It seems earlier trucks with problems were experiencing it all the time, not intermittent.
Here's what I got.... This only happens when:
- temp is 20 degrees or colder
- Truck has been sitting and is cold
- Trans temp under 70-80 degrees
- Only happens on the 3 to 2 DOWNshift when cold
The first few downshifts from 3 to 2 have a slight clunk/bump to them...just enough to feel it. After the first few initial downshifts from 3 to 2, it will not do it then, shifts fine and smooth. After a minutes of driving it, it will not do it until the next time it meets the list of items above. If I skip this gear manually until it has warmed up, it will not do it when returning to it.
-All other gears both up and down shifting feel good just the 3 to 2 when it does happen.
Once the transmission is warm or the temp is warmer outside the problem is non-existent and transmission shifts great in all gears and is smooth as butter!
It clunks real bad at random times. Whether I have had the e-brake on or not (sometimes even with it on, so I have not put any load on the locking mechanism in the tranny).
Its a 2014... Does not matter if its inclined ground or flat.
My 08 F350 V10 it replaces never once clunked.
38k and 15 months old. Runs fine except...
Can be in cruise or not, tow/haul or not, but need to be pulling a decent hill with 7k+ trailer. Running level with air bags. Regardless of speed, cruising at 50, 58, or 65, beginning incline and turbo boost builds normally to maintain speed to the point when it needs to downshift. BAM!!, not just a clunk, 90% of the time- scares the hell out of me. I can make it do it on an incline empty, but it it difficult. If because initial speed is 50ish, a second downshift to 4th may be needed. A bang only 50% of the time.
No codes.
Regardless of the degree incline, (toughest in the NC/KY areas is 6-7% grade, can avoid harsh shift by backing off on throttle and manually downshifting to 5th or 4th, depending upon speed.
Can "make" it do it on level terrain with 7k trailer if I slowly back off throttle and slow from 65 to 50 or so and punch it, but not too hard. Too hard and it goes to 4th, usually with just a modest clunk. Just right and I get 5th with a loud, and I mean loud BAM. Even the tech was impressed.
Afraid to hook up my 17k 5er and take off for the next 3 months, which is the reason I bought the truck to replace my 11...
Carrier bearing has grease coming out of it (400k on various duallies and never seen this), but dealer says not an issue.
Ford told dealer that it had no idea, and advised tech to do a lot of pin point electrical testing and everything checks out. Next stop is the inner workings of transmission.
I have been without it and work for 3 days because of backlog. Running two day load tomorrow, then back in for tranny work.
2006 long bed with LS diff sometimes gets a fairly robust CLUNK! sound and feel when decelerating with tow mode engaged. It only happens once per 20 trips and only about a mile down the road, and it only happens once in a blue moon. It definitely is the rear end making the noise and brief shudder. Otherwise the truck runs extremely well.
I had the pumpkin off and fluid changed with Ford friction modifier added at about 100,000 miles. Truck is at 160,000 now. I just got done with a trip in the mountains of Idaho carrying a truck camper and used tow/haul mode extensively for engine braking and climbing, worked like a champ. This was just one trip of many this summer. This is about the only thing wrong that happens on my truck, but usually occurs before I get very far from the house. Should I just forget about it?
I have a 2003 Ford F-350 super duty 6.0. A few weeks ago it starting loosing power, it wouldn't even go up to 15 mph. It now won't even move. There is 0 power. When I press the gas the motor bogs down to a very low idle and wants to die. I also had recent trouble with it starting. It would wind up to a very very low idle and about a minute later it would crank up to full idle. I changed the fuel filters (on top of the engine and under the cab) and also changed the fuel pump under the cab. After that I still have no power when pressing the gas it will still act like it wants to die.
View 14 RepliesI have a 2011 F-350 CCSB 4x4 w/ 20" Wheels and the electronic locker. I have had for some time a noise when I go over small bumps (pulling into garage up a 1" lip) at slow speeds. It sounds/feels like side to side movement. I have traced this down to what sounds like looseness inside the rear differential. To recreate, I lay down and shove hard on the spare tire. This pushes the truck side to side. I can hear a clank/clunk at both wheels around the brake area.
View 14 RepliesOk so the title isn't completely true. It starts. But when it's cold it takes a couple tries. When I say cold I mean Cali cold. Like low 40s. BUT when I have her facing downhill she will start up every time on the first try. What could be causing this?
View 9 RepliesI have a 2001 F250 7.3 with 175K.
Here is the situation. There is a disturbing clunk when I take my foot off the accelerator and a corresponding clunk when I push back down on the accelerator. This only occurs when the vehicle is not under load. That is, it does not happen when going up hill or on any sort of an incline. It does not happen when the automatic transmission shifts. It does not happen shifting into reverse or drive.
It does not happen when starting or stopping. It only happens when I am at 40-60, or so, miles an hour and let off the accelerator and/or press the accelerator again. It appears that I can carefully feather the accelerator to eliminate or, at least, minimize the clunk. I have crawled under the truck and it looks like all the U-joints are tight, I have lubricated the slip-yoke (although when twisted there is, like a mm of play when this is twisted, not much but a very little).
The rear-differential pinion appears to be tight (no side-to-side play or up-and-down play, or at least I can't make it move with my hands). However, when the truck is in neutral the entire driveshaft is able to rotate a half inch, or so, all the way up and down the drive train. That is, the transfer case and the rear differential appear to have a little rotational play in them, but I am guessing this is pretty normal. When in park the entire driveline seems solid.
I have seen from some of the other posts that this sort of clunking can come from leaf springs, hangers and such but since this clunk seems so isolated to acceleration changes when the vehicle is not under load, I doesn't seem like this would be the issue. No clunk when shifting, turning, bumps etc. Everything seems perfect until I am on a gentle downhill or flat and let off the accelerator. Doesn't appear to clunk when going down a steeper decline. All this gets me to thinking that the clunk is caused whenever the driveshaft rotation gets ahead of or behind the rotation in the rear differential.
What is the source of the sound? Listen for the clunk b/w 3 and 4 seconds. I just dropped off my 2016 Super Duty 6.7 CC LB 4x2 at the dealership. I'm afraid that they will say the sound is a characteristic but I never had the sound on my 2011 Super Duty 6.7 CC LB 4x4. This sound happens when I go from drive to reverse or when using the exhaust brake when towing. The sound does not exist when the transmission is cold only when it is fully hot. It will also make this noise when climbing a really steep hill in first gear with fiver and the torque converter needs to slip a little.
As far as I can tell all of the u joints are tight and the axial support is tight I only have 2000 miles on my truck.
[URL] ....
First off I'm new to the 6.0 powerstroke that being said, I bought a 07 f350 with 102k miles in VERY good condition and I'm planning on doing the bullet proof on it. But my question is that when I start the truck it will turn over about 5 seconds before it starts up. I've even cycled the glow plugs twice with no difference. If I shut it off after it's warm and start it right back up it'll still turn over for about 3 seconds.
View 14 RepliesIf I'm giving a jump:
Assume I hook positive and negative cables to the respective terminals of one of the two batteries. The alternative would be hooking positive cable to one battery and negative cable to the other battery, or does that make 24 volts? I'm also assuming if it is just the one battery, it does not matter which one you jump from?
If I'm receiving a jump:
I assume positive cable to positive post of one battery and negative cable to a good ground under the hood somewhere? Again, does it matter which battery I use? I wonder where a good ground is on this crowded diesel engine and aluminum body. Front radiator supports?
I have an 04 ford 6.0. It is an 03 model. It has 165xxx miles. It fires right up cold but, once warmed up it will crank but not even try to start. A little starting fluid and it will fire right up. I sent the FICM in and had it tested and it is good. I put in new 850CCA batteries and a 185 amp alternator so my voltage is good. I changed the fuel filter and the oil/oil filter, synthetic 5w-30. It isn't throwing any codes. I am really hoping it's not the HPOP but, think it's probably that or related to it.
View 14 RepliesI started having an issue with a rough idle soon after startup about a month ago. I thought it might have been stiction so I added some Archoil stuff the other day to my oil interval change and although I have not put too many miles on it, the rough idle is still there.
At startup the engine runs great. I did notice a few times a little longer than normal crank (~3 seconds) where other times it fires up in less than 1 second. This has happened twice in the last month. Once the engine runs for about a minute I get an uneven idle......I wouldnt necessarily call it a miss per say. I took some readings for the ICP and IPR and can provide them if someone needs them. Once the truck warms up it seems to idle better but still not 100%. I have no power loss, no hesitations jut a weird idle with intermittent surging while in gear.
The truck is starting to surge a bit like an ICP sensor going bad but not as pronounced as the last time this happened to me 4 years ago. Basically trying to get opinions as to what it might be or what to check next. I am leaning toward one of three things.....stiction, ICP or IPR valve (original). FICM voltage is good but my fuel pressure gauge broke, but the blue spring upgrade I did.