Ford 6.0L Power Stroke Diesel :: Strange Squeal Sound Coming From Under The Hood Only When Truck Is Cold
Jan 30, 2017
06 6.0L 205k
EGR, cat, and muffler delete
IPR replaced roughly 10k miles ago
New oil cooler roughly 15k ago
Replaced turbo Y up pipe 15k ago
Replaced radiator, idler pulley, and serp belt roughly 50k ago
I've got a strange squeal sound coming from under the hood only when truck is cold? It sounds like a bearing and after it gets heated up the sound stops. I talked with a guy thats a cummins guy and he said he had a similar issue and he had to replace the bearing in the turbo? Also when truck is warm it will still do it, like for instance, if I run in a store and truck idles for 5-10 mins it will do it only if I romp on it for a short while like 2-3 mins then again goes away. And if I'm idling or in neutral, hot/cold, it does not do it, it seems to be only under a load. Pull a 26 foot boat no problems.
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What could be making the strange pumping sound coming from under my hood after I shut off the truck?? It sounds like a small compressor or pump running.
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I've had good running on the truck but lately in the cold the idle has a weird skip to it like it's missing on a cyl. It will start fine, and run fine for about 30 seconds. Then it will start to mis. When giving pedal it goes away and it's driveable but it doesn't sound right. After a bit of running it's fine for the duration while warm. My monitors are I think all good, 48.5v, icp about 1250 psi. Is this the famed "injector stiction"?
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One of the many things that impresses me about the 6.7 is how well it lugs...... it'll run right down to near 1,000 rpm in 6th gear and stay there till it absolutely has to shift. Like a diesel should. Well, recently, and now more frequently my truck is making some strange noises when it lugs down. It'll mainly do it if I'm towing light, like my flat trailer empty, or maybe if I have a decent load in the bed. But occasionally it'll do it empty. As soon as it lugs down low to 1,000-1,200 and pulls there for a few seconds you'll hear a couple squeaks, then a kinda chugchugchugchug noise. It immediately quits if you let off or make it shift down. It sounds like a turbo-related noise, but I don't really know. Truck only has 9k miles on it. I just know this is one of those things I'll take it back to the dealer and they'll give me the ol "we can't duplicate the problem here." What it could be?
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The truck always made a few strange noises after shutdown, but this is new and annoying.
Here's the scenario: Truck is warm and no CEL. A few seconds after shutdown, I hear all the normal(?) noises and then a noise that sounds like a vacume pump running starts and continues for about 20 to 30 seconds. Cycling the key, but not starting the motor will cause the noise to happen again and again on each key on/off cycle.
The noise seems to be coming from the top front of the motor. Could this be fuel pressure bleeding off? Is there a check valve that is maybe not doing it's job??
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Just noticed a sound of air sucking sound under the hood on heavy acceleration only, the harder I push the louder it gets. Either sucking or hissing sound. I feel no difference in driving. No loss of power or anything else. Just the sound of air coming out like a leaking air line. I will check later this afternoon if its affecting my turbo boost. I have 235000 klms on the clock
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Just pu my new 2013 6.7 Diesel with 1300 miles... There is a most annoying whining coming from under the hood and sound like its coming from the secondary filter area or turbo (you can even feel it if you put your hand on the filter lines and housing) and it starts a minute or so after the vehicle has been running and you can her in the cab at 70-mph... At drive through restaurants I have to shut the tk down to place my order and never goes away..
[URL] .....
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I have a 2003 F350 with a 6.0. I just finished replacing my HPOP (Adrenaline Pump from Diesel Site) and fired the truck up and its making a hissing sound from the rear of the motor back by the turbo almost sounds like a tire leaking and its loud enough to hear over the engine. The truck is running and idling good but it doesn't seem to be quite 100% when I step on it.
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Okay so 2007 F350 DWR here, I have a driver who hauls loads using the truck and a 25' gooseneck trailer. She's gone through the bullet proofing process at 80K miles, she now has 128K miles. I have a programmer to monitor temps, and do all required maintenance.
With that said, my driver reported last week that when under load and going up hills he got the white spray coming out from under the hood. See pics below, this is never really good of course but I want to believe its not catastrophic. Two weeks prior I changed out the thermostat and upper radiator hose and of course flushed and filled coolant, all was good - no hoses were loose, etc. Driver reports the truck did not overheat at any time.
Both ECT and EOT are within 10-12 degrees of each other, and did not go over 190 for me while driving around town the other day. There are no codes present, I cleaned the engine bay and drove and re-inspected but can't tell where the coolant is coming from as none appears to be leaking. Last note, I have to admit after driving for a day or two I had to fill the degas bottle up about 3/4 gallon of water. My questions is, what is the next step for me in the diagnostic process?
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My truck was running rough when cold, I went to check the ficm voltage while wife was cranking and coolant shot right into the ficm and cooked the sumbitch. Stop laughing that stuff happens to me all the time. Anyhow, got a new ficm and truck wont start. Starter kicks out after a few revs. I ran my own solenoid wire to the starter and it cranks just fine. ficm at 48.5 koeo and cranking, icp 1100+, ipr from 14.8 to around 40%, ...
It takes a few seconds for the cam/crank to sync but it does. I changed the fuel filters and primed it, Got new batteries, and threw a crank sensor for s+g. With the key on and me cranking it using the solenoid wire, it almost starts. But from the key it will kick out after a few seconds. All fuses and relays are good. I hear the pcm also controls the starter, could that have cooked when the ficm went or would it blow a fuse? Diagnosing using a scangauge2 ....
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It only happens on a very Rare occasion.
When Cold, and when I start out as I open the throttle, it suddenly sounds like there is not a piece of quieting stuff on the engine. I mean its like I can hear right into the engine itself.
I back off, It goes away then I dont hear it again for another Month or two.
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So my '01 E350 has been fine but tonight when I went to start it I didn't get a WTS light and the SES light was on and there was a weird number on my PHP Hydra that looked like r5 ? This happened a few times back to back so I tried starting it and it just cranked and cranked. Wtf? So I started pushing the button on the chip and all of the sudden I got the WTS light and the hydra flashed, now the chip was on tune 10 instead of 5 where it was when I parked it. I should also note that during these episodes there was a fairly loud clicking/clunking sound coming from the drivers front under the hood when I toggle the key on.. Sounds like maybe a relay? Louder than I recall ever hearing.
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For those of you tuned and deleted......intermittent transmission shifting stutter is gone now? Mine sure is. Never once since the mods have I had that annoying stutter when the truck is cold and I'm easy on throttle between 2nd and 3rd gears. What a relief it is to have it shift NORMAL ALL THE TIME!!! Stutter no more after H&S Tune and Delete, for about two months now.
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My engine cooling fan came on when I first started the truck, was reading of 2k on torque app, ECT was appx 100* with the EOT a little cooler after about 5-10 minutes things went to normal around 600 rpm. It did not happen anymore during the drive, I was seeing about 192* ECT and 198-200 EOT. I let her set for 2 days and took her to town and the fan was at normal RPM's, Is there any problems or is that normal?
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I just got a 2006 ford F250 lariat fx4,and it's already at the shop.. when cold start it has some white smoke, but once I get up to highway speeds the truck jerks and bucks. turbo is putting out normal boost. I've changed oil and filters along with fuel filters. also put on a new serpentine belt and pulley, air filter and have everything cleaned real good. the truck is acting like it's starving for fuel. FICM or injectors ?
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6.0L Forum - I've noticed an unusual sound on my truck. Upon driving if I make a turn more than 15 degrees a "rubbing" sound can be heard through the turn, no "knocking" is not present. Once the steering wheel is straight the sound changes to a "whir". If I turn less than 15 degrees a noticeable sound can not be heard. As the RPM's vary, the sound will also vary. If I get out of the truck and listen for this sound in the engine bay I can not hear it. The sound is only distinct within the cab. It sounds like a weak motor trying to move something or a pump running low, my guess in the dark.
I've checked the oil level - good
I've checked the transmission fluid level - good
I've checked the power steering fluid level - good
I've checked the brake fluid - good
I have read that a master cylinder could wear and create a rubbing/unusual sound. What else should I check for? The truck has 238,000 miles.
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Title says it all. Chirping sounds almost like belt noise but appears to be coming underneath the vehicle (and from further back than the drivers seat). Goes away as soon as I turn off tow haul (which provides engine braking). A quick visual inspection finds nothing amiss. Trucks runs and drives normally with or without tow haul.
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Today I drove to dinner in my 2012 6.7 with no problems then on the way home my brother said he noticed my truck was white smoking quite a bit and he said there was a very strong exhaust smell coming from my truck ( he was in his car behind me) I ran a diagnostic test and what came up was code P0401 (I believe that's right). Need to figure out what is going on with my truck before I take it to the mechanics and get charged up. The truck still has DPFs in it just has a DPF back exhaust and has a AFE cold air intake running on a stock tune. However I do have the DPF deletes and EGR delete sitting in my garage just haven't gotten them on the truck yet.
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So was sitting at an idle in park and truck starts knocking, horrific sound. So shut checked oil, good, went to work came out 8 hours later, started up still knocked. Pulled into drive hit the pedal, knock went away, stopped at red light, knock came back...... Truck has been parked for 3 days, still knocks at an idle but soon as tap the pedal and give fuel it goes away... Tried unplugging injectors one at a time to eliminate, still had knock.
2003 auto, 4wd, studded,deleted, coolant filter, sct with innovative tunes 108,000 miles.
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I have a 2012 Ford F250 6.7 powerstroke. Truck has about 30,000 miles. Has been completely flawless and has exceeded all expectations. Well....I am experiencing my first hiccup.
I traveled yesterday. While going up a slight grade, running about 50 mph, 1000 RPM, 10PSI boost...truck started bucking and sputtering with weird sound coming from around the air box. It felt just like you had a blow out on the front right tire. My initial thought was i just had a blow out as the truck hopping. Well, once i let off the throttle everything went back to normal. It did this about 5-6 more times on the trip. When it would start doing this I would just let off the throttle and everything would go back to normal.
I've read a good a bit on this 6.7 and appears that turbo issues are common. Being optimistic, I am hoping this is something that can be fixed easily. Again, have had ZERO problems with this truck, runs great, and even now on the trip runs fine but now we have this intermittent issue that I do not like. I am very diligent in taking care of my equipment, have not abused this truck and all maintenance is current (actually a bit over kill). What the issue could be.
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On the way home tonight, the Ex started to make what I can best describe as a screech/squeal. It sounds a little bit like a pulley spinning against a stuck belt or a motor that ran out of grease. I heard it 4 times and it lasted about a second or 2 each time. It seems to be coming from under the hood. The only common variable between all of the occurrences is a speed between 5 - 20 mph.
Belt has been replaced recently, when I looked under the hood all pulleys were spinning normally. The only thing I can think of is maybe it's the re-manufactured power steering pump that I put in after the redhead box install or the a/c compressor. When the compressor is running it makes a ticking noise. Maybe it's finally done and the screech is it starting to spin up when it engages the pulley?
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