Ford Super Duty (1999-2016) :: Overheating At High Speed / High RPM / Under Load
I am having overheating problems at high speed/high rpm/under load. The only codes ive gotten are EGR dpfe (0401). Truck is 99 f250 with the 6.8 new egr valve, dpfe, new coolant, new thermo, new sensor under manifold. I blew 90 lbs air pressure thru the egr lines, big and small, they were clear.
So whats left? I never hear my fan clutch......should I? I've had other trucks and the fan roared when first started for a few seconds, and then again when you were hot...they really roared.
Is it possible for the egr port where it goes into the throttle body to be plugged? guess I should've checked that when I had the egr off. Would an aux. fan be a waste of time?
This is pulling a 3500 lb camper trailer up moderate hills.
Ford Super Duty (1999-2016) :: 2008 - Overheating At Even 65 MPH?
Im running an 2008 F-450. And towing a goose neck trailer with the total weight of 12,000, including the car in tow. We were traveling from Cleveland to Columbus last week. Traveling south down Rt. 71. Which has some subtle gradient here and there. But nothing extreme. I haven't tried any mountain runs yet. when i started noticing the temp gauge climbing from middle normal range to high normal.
It would then kick out the cruise control. It would cool off after about 5 minutes of slower driving. We were only traveling at 65 mph. Outside temp was about 78 degrees. I shut off the A/C and it seemed to improve. Should it be over heating like this. The capacity of the 450 is 25,000. I am at half that right now. Are these truck prone to heating problems. And if so. Is there a high performance supplement cooling system.
Ford Super Duty (1999-2016) :: 2008 F250 - Vibration When Accelerating From A Stop And Under Load
My F250 6.4, 3.73 Crew Cab Short bed vibrates when accelerating from a stop with my 5th wheel on. The 5th wheel weighs 12K. It is a medium to high frequency vibration that is felt throughout the entire truck. It continues through the shift into 2nd (TorqueShift Tranny). The harder you accelerate the more you feel it.
It does not occur if truck is unloaded and you accelerate at full throttle. Is this normal or should I get it looked at?
Ford Super Duty (1999-2016) :: 2008 - Losing Coolant - Overheating On Interstate?
I have a 2008 6.4 f-250. It has 139,00 Miles and I have a problem with the truck losing coolant and overheating on the interstate. When cruising 75-80 my truck will sometimes begin to puke coolant from the degas bottle and my cooling fan will begin to run. Engine coolant temp once spiked to 240 degrees before I could get off onto the shoulder. Around town the truck does fine although I do notice a loss of coolant but no overheating issues what so ever. I have the Dpf Deleted and Egr coolers are off. I run an H+S on a mild tune. Is there any other thing that could be wrong with this truck besides head gaskets? I am not looking forward flipping that bill. Trying the exhaust all other possibilities first.
View 3 RepliesFord Super Duty (1999-2016) :: 2008 - Front Brake Locks Up / Smoke Rolls Out Along With Overheating Popping Sound
I have a 2008 F250 which has been a awesome truck. Very few issues except for one that no one can seem to fix. Its regarding my brakes and a mysterious reason all of them have to a degree locked up and smoked the pads rotors etc. I now have 80k on the truck and have replaced all brakes once and now the front left have locked up for a second time. The scenario goes like this:
So i'm driving along and if the front brake locks up I can begin to smell it. So I pull over and smoke rolls out along with the overheating popping sound from the effected brake. Rear brakes usually are not found until I stop which i get out and then can smell them. Funny thing is the brakes have locked up when not towing. Also, I have never had more than one happen at a time. So as today all brake pads and rotors have been replaced and now the left front has overheated again. From what I can tell the caliper just doesn't fully release. What could be causing this?
Ford Super Duty (1999-2016) :: Stalling Under Load / Intermittent
My current truck is an early 99 F250, 7.3L diesel, CC 4x4(manual shift transaxle) auto transmission. It is basically stock, with the exception of a hutch/harpoon and a new fuel pump over the winter, an AIS intake. I have a magnaflow exhaust kit in the garage along with bellowed up pipes but have not installed them yet.
Here is my issue. Several times over the last 2 years, the truck will pull a load, or long trip, and with complete randomness, the engine will feel like it has shut off, there is usually a jerk or two, and the truck "restarts" itself and continues on like nothing happened. Last year we drove 1.5 hrs from home with the boat in tow, driving up Snoqualmie pass, and it died completely, no restart. We had to be towed home. It started right up at the shop, so no real clue of what happened.
When this happened, I had the fuel system checked for pressure and replaced the engine fuel filter, and all was good. I also had the Cam position sensor replaced/updated to the new grey sensor. Shortly after, I had the minor jerk/stall occur again, so I replaced the fuel pump and did the hutch/harpoon mod to ensure there wasn't an intermittent fuel pressure loss and that the in tank filters were not clogged.
Last weekend, i pulled my boat to Oregon, and the same "hiccup" happened as I was about 1.5 hrs into my trip. it was fine after that the rest of the 4 hr trip. We also drove back the same route and had no problems.
Ford Super Duty (1999-2016) :: Grumbling Sound When Under A Load
50 V10... How to tell if the grumbling sound when under a load is the posi plates? If so, how to replace them.
View 8 RepliesFord Super Duty (1999-2016) :: F250 - Skipping / Surging Under Load
I have a 99 f250 that seems like it has a bad coil, under a load it starts surging or bumping ( like it has in the past and I found a bad coil), I went through and unplugged each coil one by one while idling, couldn't find a bad one, so I bought a new coil and went through and rotated the coils, nothing worked, no check engine lights on.
View 9 RepliesFord Super Duty (1999-2016) :: Vibration When Starting Out In First Gear Under Load?
I have begun to notice a vibration when I am in first gear starting out with a bit of a load. The vibration goes away as I gain speed and the load reduces. None at any of the higher gears. If I take off real easy and allow the truck to gain speed without pushing it, the vibration does not exist. The truck is the one outlined in my signature. It is equipped with a 3 speed auto with overdrive. I am thinking this could be a U-Joint that might be starting to go out.
View 9 RepliesFord Super Duty (1999-2016) :: F250 - Whistling Turbo Under Load
Just bought a 1999 7.3 f250 w/71000 miles and took it to a diesel guy and under load he said that the whistling was normal..is this correct?
View 3 RepliesFord Super Duty (1999-2016) :: 2003 F250 5.4 - Starts Cutting Out When Under Load
About 20 miles into it, and it starts cutting out on me under load, over about 1/4 throttle. I baby it a ways further, and park at a wal-mart. Idles fine, but once again, after 1/4 runs like crap, acts like it's back firing through the intake spit and sputtering. Have the wife come pick me up since I was heading to work. Decided to shut it off, and restart, and it acts like its never had a problem.
Was messing with it today, and let it warm up in the driveway. Once it got hot, same story good 1/4 throttle, past that, not so much. Shut it off, started it back up and drove it to see if there's any codes at vatozone. Drove good (laying into the throttle) for about 2-3 minutes, back to same behavior. Hooked up code reader, no current codes, and no historic codes. Although I did notice (actually since I bought the truck) that the check engine light never comes on, even at initial start up. Looking at my spare cluster, it's an l.e.d. So no bulb out I guess unless the led is bad. Truck has around 130,000 miles on it. Everything is stock.
I'm leaning toward a fuel pump, a clogged cat, or a fuel pump relay or cutoff switch problem.. It doesn't have any other issues than that, and has been a good truck for the 10k miles I've owned it... 2003 F250 5.4...
Ford Super Duty (1999-2016) :: 2001 - No Power Under Load Or Full Throttle
This has just started this past weekend out of no where.I went to accelerate up a hill and when it got to around 2500 rpms it just starts acting like a rev limiter kicks in.When i let off throttle it smooths out and runs fine, seems anytime its past quarter throttle it doesnt not want to move anywhere.If you drive normal in city conditions or on a nice flat round with barely any throttle it runs fine.I replaced the fuel filter no change, removed air filter no difference.Its actually at the shop now and they say its a transmission problem, my opinion i disagree fluid is up, no burning smell, and shifts fine under normal (slow) driving. 2001 Super duty 5.4 triton....
View 14 RepliesFord Super Duty (1999-2016) :: Transmission Rattle At Low RPM Especially In Lower Gears Under Load
This is an early 99 f250 powerstroke 6spd manual 4wd, is it common or normal to hear a lot of transmission rattle at low rpm especially in lower gears under a load. Starting off from a dead stop it sounds awful until about 1500 rpm where it clears up (or load is reduced). I'm hoping it's just the power pulses going through splined shafts, gears, etc.
210k on the truck, just changed every fluid in it.
I've been a honda owner and mechanic for all of my driving years where shifting at 8500 rpm is common and now I'm having a hard time learning what this thing likes, rpm ranges to avoid, ect; even shifting I find difficult. At least you can heel toe with the pedal arrangement...
Ford Super Duty (1999-2016) :: F550 - Uneven Load On Rear Suspension
I have a new to me 1999 f550 w/ 7.3 and I have installed an aluminum service body with a crane on the passenger side bins. The crane itself weights about 650lbs plus the steel frame it is mounted on (superstructure in the aluminum service body). I'm concerned about the uneven load on the rear suspension. It does sag slightly to the passenger side - guessing 1" - I will measure tomorrow.
1) Should I be concerned?
2) What can I do to correct it? (without just adding weight to counter balance it).
Ford Super Duty (1999-2016) :: 2001 F250 - Slight Bucking Under Load
I have a 2001 Ford F-250 5.4L V8. 117,000 miles. The problem I have been relentlessly trying to diagnose is a slight bucking that occurs under load when the truck is in overdrive. When the truck bumps up to higher RPM's it is fine but when it is around 1500-1700 RPMs on the highway it does a small buck like I'm hitting a bump in the road. I know there are many threads on this but none of them have gotten me any closer to a resolution. It also seems to have a bit of power loss when accelerating. Things I have done so far.
-Spark plugs and COP replaced about 1000 miles ago
-New fuel filter
-Cleaned MAF sensor
-Cleaned throttle body
-New PCV
-Seafoam treatment in gas and through brake booster.
Ford Super Duty (1999-2016) :: 2002 F350 - Ticking Noise Under Load
I was having a ticking problem with the engine under load so I went ahead and did my manifold gaskets. I had a new 5.4 put in my 02 f350 last winter, and at that time I also installed gibson shorty headers. The tech had to plug the egr port with a pipe plug. But any ways, I pulled the headers last month and I used Percy's aluminum header gaskets. I also took the time to wire wheel all of the flanges and the mating surfaces. The one on the ball and socket flange was leaking on the passenger side, so I permanently sealed it with some 1800* epoxy.
The leak seemingly went away for a week or so, but it has returned. I sprayed down all of the mating surfaces with soapy water, but I can't find the leak. It only happens when accelerating or when i downshift to go uphill. So, at my wits end, I went to try and retorque my spark plugs. I've done half of them so far. Haven't driven it yet, but i was curious as to others thoughts on the subject. This leak cannot be heard at idle, nor at any RPM while in park or neutral. It is only apparent when driving. Definitely sounds like an exhaust leak to me.
Ford Super Duty (1999-2016) :: Vibration Mostly Noticeable While Under A Load Like Climbing A Hill
My current 08 duty was bought with what I believe to be a procomp 6" lift modified to an 8" lift. The 100 mile drive home after buying the truck showed a tiny "hop" in the rear. I ditched the 37s for some new 35s. Still a tiny hop, mostly noticeable while under a load like climbing a hill. I pulled the rear driveshaft and had it fully rebuilt with a new carrier bearing as well. Still gots the hop? The truck has a carrier bearing drop bracket but I think it may be insufficient for the lift.
The rear driveshaft still has a slight bend in the middle of where the two driveshaft pieces connect. Are the 2 piece driveshafts on your 8" lifted trucks sitting straight with each other or do they have this bend as well?? I am thinking if I get a bigger drop bracket it may cure this slight hop I have? Lots of lifted trucks where I live but they are dam near all shortbox with 1 piece rear shafts so I haven't been able to find one to compare. By the way, my truck also has pro comp rear traction bars..
Ford Super Duty (1999-2016) :: Engine Blows Out Smoke When Pulling Load?
Truck blows smoke like a blown NASCAR engine occasionally when pulling heavy load....pull over, cool off and resume driving. Its as if it never happened. All fluid levels are in range and truck drives fine minus load. My last f350 5.4 did same thing at about 200k miles. My local ford dealer tells me I'm the only guy on earth this Has happened to.
View 8 RepliesFord Super Duty (1999-2016) :: F350 RPMs Surges When Going Uphill With A Load
1999 F350 7.3 Super Duty surges when going uphill with a load. The only time we drive it is when towing the horse trailer - also has a camper on.
The truck doesn't physically surge, just the RPM gauge goes up and down and along with it a humming noise.
Also, What conditions should I engage the towing button on the end of the gear shift? I've heard several answers. Should it be engaged when towing or off?