I'm a mechanic but work only on cars so I'm a little shy on diagnosing trucks. I have a 2001 7.3 f250 4x4 short bed, when I give it gas I can hear a clunk, when I let off of the gas I also hear a clunk. Also when traveling at high way speeds I can feel a strong vibration when I very lightly give it gas but the vibration goes away as I give it more gas.
View 5 RepliesI recently purchased a 2001 excursion 7.3 after driving it for a while I have noticed a significant clunk and vibrate in the rear end. I have read a lot of people saying it could be the slip yoke needing lube which I intend to do but most are saying that their clunk is at start and stop.
Mine is between 30 and 60mph when I let off the accelerator I get a clunk followed by a vibration and when I get on the accelerator it is just the clunk. Does this sound like the slip yoke to yall or am I looking at something more? I have tried turning the drive saft and there is no play in it at all.
I have a 45 min drive to work every day, all highway. Lately on the way home in the afternoon I have been experiencing a surging noise that seems to just happen while I'm doing hwy speeds. It sounds to me like the fan is tuning on and off. Is that possible? It comes on for a few min. And then off again. I have new icp ipr cps. New oil and filter and fuel filter.
Also I'm still having a battery light on and off issue while I'm driving. Is possible the two issues are connected. I plane on doing extensive search for a bad wire this weekend. Batteries and alternator have checked out and are fairly new.
I have a 1999 F350 200,000 miles. Now getting an intermittent engine light. Still runs well, although once or twice I felt a momentary surge at highway speeds. The light is on intermittently about 1/2 time. I read the codes and the following codes, as in the thread title, came up:
P0280 - ICP circuit out of range - low
P0113 - intake air temp sensor circuit - high input
P0470 - Exhaust back pressure sensor circuit malfunction
P0478 - Exhaust pressure control valve - high input
What would make these all code at the same time? Would these not make a noticeable problem driving? And how do I resolve these?
I have a 2000 with a six speed and through the first 2 gears while giving it only a little throttle, worse on hills and worse while towing I have a pretty decent vibration. Once you get to 3rd and up its fine. I have read about axle wrap and due to the fact my springs are pretty wore out I think this is a big part of it. Any other things to look at other than new springs? The u joints all look and feel fine so I haven't touched them.
View 8 RepliesI have a strange noise that occurs at both highway and surface street speeds. On surface streets at low speeds 45 mph and under, if I let off accelerator to coast and lightly step on accelerator I get this quick sharp noise.
Everything I have read regarding a similar noise is under load and being described as a turbo fart. Clearly I am not under any load. I'm lost.
Definitely not a low woooo noise. Also not a hard accel and release and definitely no chuckle and or popping. The sound is high pitched and quick, roughly .5 to 1 second at most. The sound is more like a "zzzrrp" or "zzzoop". I can replicate the sound 50% of the time easily at speeds under 45 mph by briefly coasting (no accelerator) and lightly tapping the accelerator and releasing or holding. Occasionally this sound will occur at full stop when I step off of the brake pedal and before I step on the accelerator. This sound can also occasionally be heard at highway speeds under similar accelerator conditions though it may be more frequent and I just don't notice it.
Would this condition throw a code? Just received "Total Ford Scan Tool Package Enhanced Bundle SP03" scanner from autoengenuity. Hoping to put it through its paces tomorrow.
Additional info: 145k miles. Injectors serviced by a reputable diesel shop here in Vegas approximately 1.5 years ago. Unknown oil leak where oil is collecting in the valley on top of the engine beneath the turbo. HPOP seals were replaced roughly 1 year ago at another reputable diesel shop here in Vegas. Still have an oil leak (turbo related?) Oil is under 500 miles old and acceptable level. Fuel filter is due for a change but that does not seem to affect condition. Air filter 1000 miles. Thinking about upgrading to AIS severe duty kit soon.
165k miles 4x4 6 speed, bone stock unmolested
Slowly progressing problem over 6 months. Occasional miss at highway speeds uphill has progressed to bucking and jerking during even gentle acceleration attempts.
I hadn't got my cam sensor recall done but no change after that procedure completed yesterday. Oil recently changed as well.
I have a torque pro but it never finds any fault codes even though 'service engine' light comes on sporadically. I'm not sure I'm operating it properly but it at least reads rpm when its running.
I'm contemplating the hutch mod but I'd like to have an official diagnosis beforehand if its possible in my case.
Since day one my 2016 F250 occasionally has a reed sounding vibration at highways speeds near the passenger side occupant handle on the windshield pillar. Talked to a service advisor at the dealer about it, what it could be, so this must not be a common problem . The issue is intermittent and can not be reproduced on demand. I tried blowing compressed air all around the area of the Windshield to see if I could reproduce the sound in a shop setting, but no luck. Only thing in common with this noise is 75+ MPH during a rather windy day. I'm a little reluctant to drop it off at the dealer since intermittent problems are hard to diagnose.
YouTube...
Any clue as to why when im sitting at idle or at very very low rate of speed my A/C seems to work like a charm, but if i am traveling down the highway or basically anything above 40mph it seems to die down, like doesn't even keep me that cool..
View 3 Replies2003 f-350 6.0 4wd dual rear wheels
4 inch superlift suspension lift, dual shock steering Stabilizer
33 inch wheels.
4 inch turbo back exhaust
Other than that it's really bone stock
Here's what's going on. In 2wd, between 55mph and 62ish mph, once I hit a constant speed, a rumble beneath my feet emerges. If I either speed up or slow down, it immediately goes away.
Does the same thing in 4wd high.
I can eliminate front drive shaft and u joints seeing as they shouldn't be turning while in 2wd. I did notice that when I push up or side to side motion in the front drive shaft, there is a click and a bit of motion. Is that normal? Just a side thought.
When i take off there's a bit of vibration from the rear half of the truck, but I've isolated that to the center support bearing. With all this being said, none of these symptoms were around before I lifted it.
Have a 03 f350 with the 6.0 have been experiencing very harsh shaking problems. This only happens at highway speeds 55-60 any other speed is smooth as can be weather it's 25-95 mph. The weird part is that it only shakes when the truck shifts into overdrive and it shakes bad and if you lay into it like you were gonna pass someone it stops then shifts back into overdrive and shakes again.
View 6 RepliesI've been having a problem which i cant seem to find the fix for. My ABS and ECS dash light keep turning on. Its intermittent and does not stay on. Ive noticed that it usually happens if I travel at highway speeds for more than 15miles. I had the brakes x4 changed 1 year ago and all brake pads show good life. Brake fluid is at a good level with no leaks to be seen. I am wondering if its one of the sensors? How can one check for that? I have a 2006 3.3l GLS with 86k.
View 2 RepliesI noticed a clunk a while ago but could never pin point it and today its the worse it has ever been. I did some research on this and everyone is pointing towards sway bar bushings. now if that is the case why wouldn't they just replace the sway bar link? I see some do poly bushings and others regular rubber. What is the best way to go about this? and I also see you need a shop press so I'm lucky I have one.
View 6 RepliesWhile pulling onto the highway and pulling pretty hard lost engine power all boost then engine truned off. Top of engine is covered in oil..... What happened?
View 11 RepliesI have a 2005 6.0. I just got done doing the HPOP seals, injector o-rings, stand pipes and dummy plugs. I have drove the truck 600 miles since the work with no problems other than a wiring issue I got fixed...
I was driving at highway speeds, and all of a sudden I lost power and got a shake when trying to accelerate. I pulled over and turned it off, and when I went to restart it I got nothing at first, then it went to what seemed like a partial crank followed by a thud. So I'm thinking I just hydro locked it. I waited a few mins and tried again, and it started but had a few knocks for 15 seconds or so, then it ran rough with smoke pouring out of the exhaust (grey then turned kinda white).
I the only codes I have are for the egr which I've had unplugged for a long time, and a glow plug code, but when I started it back up, I had no codes. I'm baffled. I did notice I have oil on my oil filter housing at the cap, a little oil had slung on to my wire harness and my intake. I don't even know where to begin!
I have a 2006 f250 6.0. the truck has 101k miles and to this point I have had zero issues. I am having trouble loosing power after running at highway speeds. Once I stop and begin to accelerate the truck looses power for a few seconds ,Belches smoke and begins to operate normally. I had an egr code, so I replaced egr and the problem persist. It is intermittent and does not happen if I stay under 50 mph.
View 12 RepliesI have a 2000 Excursion 7.3, 6 position tune, and exhaust as far as mods (on truck when bought). Last couple of weeks I get no power while on the throttle, foot on the gas and the whole truck shakes at higher speeds - 40mph and above. At first it wouldn't go above 60 or so, would hit the gas and Rpms would just stop not be able to generate any further power. Changed the IPR, ICP, and CPS.
I still get the high/low range ICP codes, P1280, P1281. First night the IPR was changed I got it up to 90mph and thought it was all solved but got a little shake right at the top and I let off the gas. Next day back to square one and has seemed to get progressively worse, almost wasn't able to make it up a hill by my house not even going 20mph, but it's like intermittent. I have a scan tool, here is at idle and at around 60mph ....
Headed to town with the kids and my truck shuts off going down highway. I pull over and start it back up and make it to 30mph and shuts off again. This time it will not start. I have 1/4 tank of fuel, I first thought it maybe the issue inside the tank causing it to shut off. I get some diesel pour it in and it fires up for about 15 secs and shuts off. I pull the fuel filter, making sure o have fuel in the bowl. Start it up and it runs for about 10 sec. I then swap out the CPS. Same thing, runs about 20 and cuts off. I then call AAA because I am tired and ready to go home. I have it towed to my buddy's shop. He has not looked at it yet.
View 3 RepliesI was driving on highway about 55MPH when I lost power suddenly. I was able to pull off, but did not have power brakes or power steering. Gas tank was near 1/4 gallon on the gauge, but sometimes my gauge is wrong, as I've run out 2x when I should have still had a few gallons in it.
At first I thought CPS, but I didn't have a spare with me to swap. Well, after an hour or so, I cranked it, and it would turn over but not even try to start. I floored the gas pedal and it fired up and I was able to get home.
During the no start issue, there was no oil pressure reading on the gauge and the tach was not moving, even though it was turning strong. There was no white smoke that I could see either.
When driving my truck it coughs randomly not towing or anything going about 70 mph drops rps slightly and goes right back. It has 212000 miles new turbo and filters...
View 1 RepliesI have recently picked up an older F350 2WD 7.3 DRW Lariat. the price was right higher miles but hey it is a 7.3, overall in very good shape.
So the issue at hand is the truck runs great most of the time and puttering around at city speeds you would never know there is any issue;
Get the truck out on the highway set the cruse at 70 to 72 and if you hit a rise in the road or other reason to slightly accelerate the truck chugs and bucks. For lack of a better description it goes chug chug chug, if you accelerate harder to downshift it goes away or if you back off the throttle it goes away. This happens with cruse on or off, a steady foot on the pedal will cause this as well.
I have also noticed that when you let off the throttle the sound the truck makes de-fueling is just very different and "off" sounding . Not sure how to describe it but it sounds funky ... clearly not right when compared to other 7.3 or my 6.0 truck.
What I have done, :
1. Had the truck scanned with an AE and a snap-on scanner both show no codes ran injector tests no contribution errors, not even in # 8.
2. Changed fuel filter
3. Changed Oil and Filters ( tried both full synthetic Rotella and Dino oil looking for a difference )
4. Cleaned out the fuel filter housing just in case.
5. Confirmed injector O-Rings are not leaking
This feels like a fuel issue, my next thought was start looking at fuel pressure under load at speed to see if there was a drop when this is happening ?
Is there a way to test fuel pumps in this truck ? Maybe a clogged pick-up screen ? Where do I start looking next ? I have reasonable mechanical skills but don't know this motor very well, this doesn't seem like a CPS issue..