Ford 6.7L Power Stroke Diesel :: F350 Shifting At Lower RPMs
Apr 9, 2015
Just bought 2 new F-350 with 6.7s for a service truck and feed truck. I have a 2011 6.7 so pretty familiar with it. I noticed both these new trucks shift at a lot lower RPMs. At times if going from pasture to pasture I have noticed the tach at 900 rpm in 6th gear. My 2011 doesn't do that, it shifts at a higher rpm. Both of the trucks have been deleted, and I have a SCTx4 tuner in each truck and have both tuned to the lowest setting, Tow 40HP. Is this a fuel economy thing?
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I've been having rather slow throttle response with my 6.0 f250 diesel at lower RPMs. Obviously, this is to be expected to some point.. Whether I'm cruising on the highway or through the neighborhood, if the truck is at lower RPMs and I try to accelerate, it doesn't want to. In order to get it to accelerate, I have to press the gas down enough to downshift it then it'll take off.
The truck doesn't have a loss of power at higher RPMs, it takes off like a bat out of hell. I've put 175CC injectors in, tuned it, power max turbo, EGR deleted / studded, etc. It's almost go out with acceleration, or go turtle power with acceleration.
Oil pump was replaced a couple years ago. This problem existed through it all, and it's rather annoying. The truck doesn't want to produce any low end power. If I try to hit the gas enough to accelerate but not enough to force a downshift, I'll just blow smoke, spool the turbo, and barely accelerate until I down shift or push the truck through it. Turbo PSI is roughly ~15ish-20ish during the sluggish transition.
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So my 11' F350 is over heating when the engine RPM's are below about 1300 whether the truck is moving or not. If I let it idle for 2-5 minutes I can watch the temp gauge go to red and an engine over temp message appears. I noticed that if I rev the engine to > 1300 RPM it cools back down.
This appears to be a water pump going bad, any other thoughts? Are there instructions for changing the water pump here on the forum?
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(2000 F-350, 7.3L, 205k miles) Over this weekend, I noticed while driving mostly in the lower gears, that there was a slight hesitation with the throttle pedal depressed about half way or less. Seem to get worse as the day went by, but no lights or anything came on. Changed the fuel filter and added a fuel injection cleaner to the tank. Checked the oil and it was low, so I filled it to the correct amount.
Drove it around the next day, and it seemed to be good, until it warmed up some, and continued to hesitate. The hesitation seems as if it's not getting constant fuel, and the truck jerks a little. Once you get up to over 2000 rpms, it goes away. Looking up other reviews on similar issues, most have pointed to the throttle pedal sensor and just changed out the pedal assembly. Before I take it that far, I wanted to see what was the corrective action.
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Some people say it's normal to lose some boost after the delete, some say it's not and you need a tuner. Before the delete, I could regularly see around 28-29 psi on the factory gauge if I jumped on it. Now, I see about a max of 20-21. I have no leaks that I can find and the truck runs just as it did before. I still have my EGR plugged in laying on top of the engine and don't have a check engine light-yet. Is there a definitive answer as to how to fix this or is it really considered normal to lose that much boost after a delete? I don't really want a tuner because I'm not looking to add HP, but if that's what it takes, then I need to save up. I also read somewhere it can depend on the strategy.
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Have a 2003 F-250 with 174,000 miles. Recently replaced CPS and ICP and it's running much better. It normally idles at about 700 rpm. Lately, after driving for any distance above ~40mph, when I come to a stop, the rpm won't drop below about 850 rpm. If I shift to neutral (automatic trans), the idle drops to around 700. At the next stop sign/light, it's back up to around 850.
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Trying to get some assistance on a mystery oil leak. I see wetness above the oil pan on the left side near a tube. That is the most fresh oil I can find at the highest point. The passenger side and starter also have drips, but i am thinking it may be running across the oil pan rail as I cannot any source on that side. Also, recently started having a rough idle - surging. Of course I thought ICP, doesnt feel wet.
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Have just about 1,600 miles on tuck born on 12/14/11. Love it, but.. When going slow in subdivision I am getting some hesitation/bucking when going in the upper 20s/lower 30s. When I feel it I look down and I am usually in 3rd. Is this the transmissible thing? When it happened Sunday it felt like it was going to die. If I start off with a quicker start (to get to highway speed) it shifts fine. It just started the last few weekends......
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Was replacing my cracked and leaking charge air cooler pipe Friday evening and noticed oil all over the place at the lower front of the engine. It has been a few months since I've been under the truck. No drips on the ground so it must be a slow leak while driving. Oil level is fine so it hasn't been leaking for long.
Any ideas from this limited two picture view? Front main seal? I've been reading the vacuum pump leaks oil as well but I'm not sure where that is other than driven by the HPFP. I took additional pictures but those were useless, it's a bit cramped in this area.
In the past ten months I've had the turbo coolant inlet pipe leak repaired and then the DEF heater failed, which means replacing the entire pump of course. The wastegate solenoid air compressor noise started some time ago as well at shutdown but I haven't been concerned about that (it doesn't seem to cause an issue). 96,000 miles.
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I know jack about tie rods. But what I do know is the passenger lower-outer tie rod is clunky [Right where it connects near the wheel. Jacked up the truck and moved the tire from right to left and the passenger side lower tie rod made a very obvious clunking noise right where it connects with the upper piece.
My question is, can I just replace the passenger lower arm or do I need to replace the upper [not sure what it's called] that it connects into? While under the truck I found it difficult to figure out exactly how they are joined together and taken apart? My drivers side is nice and tight, no clunking.
2005 F-250 CREW CAB 4X4
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This past week my wife and I took a short trip and returned on a gravel road. I went to start my truck the next morning and there was a puddle of diesel fuel on the driveway. When I looked under it, I noticed that the tip of the fuel filter housing is gone and is leaking slowly from there. I called the dealer and they would not fix it on warranty, the truck has 20k on it. The service man said he would not turn this into ford. I've had the similar problems with this particular dealer. It's obvious that a protective cover is needed for this. I kept the part and am thinking of sending it to ford.
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I've recently brought her back to life after a couple months of delayed loving due unforeseen reasons. And now the fuel gauge is completely under the E marking! I'm fairly smart and have looked some things up from other forums just trying to get a one on one response of that makes sense. "If were in the military you will understand" please break it down Barney style!! Not saying I'm dumb just want a good understanding
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I ran out and test drove a new to me 2001 F350 7.3L tonight. Everything seemed good, until I got back from the test drive. I pulled in and was sitting there with it idling. It seemed to idle fine, then a very small miss and very small shimmy then idle fine again; then another small miss and another shimmy. It continued like clockwork. Every time it seemed to miss and shimmy, the RPM would drop just a little, but not much. Does an ICP sensor sound like the problem, or maybe something more serious? 2001 F350 7.3L with 235,733 miles new trans, turbo replaced at 150,000 something miles. No blow by. Idled fine before driving, also drove fine. It doesn't seem to surge when idling, just kind stalls and shimmys for a split second then idles fine for a few seconds.
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I know that to remove the lower knee panel under the steering wheel all that has to be done is to pull it off and the attachment snaps will pop free. However, How do I go about removal of the dash panel to the left of the steering wheel? This would be the narrow panel that also houses an ac vent, headlight and I believe it is the adjustable pedal control.
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Just had to replace radiator at 38k on my 2012 SD. Now I have another leak at 41k. Looks like it's wherever the lower radiator hose leads. Kind of a weird junction. I don't think it's coming from above there, but not sure. It's the primary dgas bottle that was low. The radiator was covered under my ESP. We'll have to see what's up with this one. Been eying a denim blue SD at dealer, thinking this is going to talk me out of it though. Not especially happy right now.
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Just got off the boat (offshore boat captain) and my wife has been using my truck while I was gone so it doesn't sit for forever. I made a quick trip to the hardware store for some materials and back to the house. Total drive time was about 20min. Noticed that I had a terrible shake like a weight got thrown off a wheel. When I got home and started looking at my tires I was on the passenger side front tire and noticed oil on the driveway. That's when I saw the drop.
Now I climbed under the truck and looked around and found oil all over the passenger header and starter and basically all down the passenger side of the motor. I popped the hood and and the valley was clean. Then I felt around the passenger valve cover and found a lower valve cover bolt missing. Second from rear on the bottom. My question after that long description is, can one missing bolt cause a leak bad enough to completely clean the oiled areas and start the truck and in about 1 min have clean oil dripping down? If so, when I get a bolt should I go ahead and replace the gasket?
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I would like the hear what others have to say about the problems I'm having with my 2006 F-350 sd xlt 6.0 with 113,000 miles on it. It's being used as a tool truck mostly going from a shop on the property to close by buildings on the same property. In other words very short distances. Used occasionally to take a dump trailer to a close by dumping ground.
1. White smoke from exhaust. I've read this is most likely an ERG cooler that needs replacing. Any other possible causes? If I end up having to replace the cooler is there a stock cooler that is reliable or should I get the one by bullet proof?
2. Diesel is dripping from the muffler weep hole. Last full tank lasted only 60 miles. Could this be the oil cooler? Anything else? If so is the Ford replacement cooler OK or should I go with an upgraded cooler?
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I currently have a 2006 F-250 6.0 with 187,XXX.
My problem that i am having is that the transmission recently within a couple weeks started acting weird about the same time 3 of my fuel injectors started failing. When i start up the truck and put it into drive it takes about 3-5 seconds to shift. Once it's in drive it runs pretty well but it will start shifting out of normal when i go to accelerate. Also when i go to slow down sometime the transmission shifts hard to a lower gear. I also have a video of the sound that it had started to make since its hard to describe.
Here are attached videos and photos. I want to hopefully fix the problems myself so i can learn more about my truck. I am going to handle the fuel injectors here soon since 2 are failing and ones about to these have been causing the truck to shudder at around 47-53 mph but after that its fine.
The transmission is stocked and never been altered, i do admit for 3-4 years I have changed the fluids or filters.
The truck is bullet proofed, sct tuner, upgraded turbo from stock, 4" exhaust, head studs and new everything when the engine was rebuilt and bulletproofed.
I plan on going to ford tmw to have them figure out the problem and hopefully its just solenoids so i can fix it myself. I have a link posted also where you can hear the noise it has been making when in R P and when shifting going down the road and it is a automatic.
YouTube.....
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While I'm cursing at highway speed everything is fine. But when u punch it it pass someone it's like I actually slow down, same from a red light. I've got a livewire programmer in it and this problem is somewhat new. It just seems to keep getting worse, I was going up a hill on the interstate this morning and at 2800 rpms I was actually slowing down. I'm not sure if the fuel pump is going out or if the transmission is slipping or what.
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What's everyone's fan rpms at idle? Mine vary and lately I've experience a strange issue where fan immediately locks up and rages right after cold startup. Today it was running 2900 rpm. It settled to about 480-500 but I know I'm the past it's been like 300 or so at idle.
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When I'm at 60 mph and go full throttle, it doesn't seem to down shift enough and the torque seems low. But when I go 1/2-3/4 throttle, I get the power I'm looking for. I'll test it later today and see what gear it shifts to with both.
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