Ford 7.3L Power Stroke (1999-2003) :: Buzzing Sound From Engine?
Jan 20, 2009
I've recently picked up a new noise. At idle the engine buzzes. It sounds like the vacuum pump running but coming from the engine (the vacuum pump is not running while this noise is happening). This noise could also be happening while I'm driving too but the RPMs bring up the engine noise so I can't tell. Nothing looks out of the ordinary and I haven't done anything different that would give me any direction (no off-roading). It was just there one day.
The truck doesn't seem to be running any differently (right now), just the buzzing. I just want to catch it if it's going to become something serious. An ounce of prevention is worth a pound of cure (not to mention the towing bill!).
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I have had a 2000 f250 crew cab for little over a year now. Two previous times, after heavy rains, the cabin light would blink on and i would get a buzzing sound under the dash. I would solve the annoying buzzing sound by opening and closing the door. After a few times, it would work, but my clock and radio could go on without the key in the on position. The next time i used it, no problems... so i put that worry in the back of my mind.
This morning it rained really heavy, sideways type of rain. I opened the door and noticed a small puddle on the vinyl floors right where my left foot goes. OH,oh i thought, but the truck turned over and ran like normal. I picked up a heavy load of hickory in the bed and hopped back in and noticed my speedometer jumping from 0- 30 when I was going about 35. The OD light was blinking, but the transmission shifted normally. I got up to about 1700 rpm and the speedo was barely jumping at 53-55. I make another stop to unload the wood and go back home and i get an intermittent buzzing sound on the way home and no speedo. OD light would start blinking before i hit 2nd gear. I also noticed the odometer not working (speedo related, right?)
I got home and took the fuse relay cover off and found that if I would remove the #1 relay "plug" (black square box 5 prongs) that dreaded buzzing sound would go away, checked it out , plugged it back in, buzzing back on. The clock light still stays on and radio will turn on without the key. I think that water obviously leaked in over something electrical and i have been searching this and other forms for a couple of hours. I am within a couple of weeks of saving up enough to buy the gauges, exhaust and possible DP Tuner and now this happens?
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After disassembling what felt like the whole front end of the truck, I finally gain access to the danged thing. Mine has been acting up intermittently for about year and half I guess. When flipping to switch to signal turning, it started making a buzzing sound. At first it was doing it most of the time. Then it cleared up and started working right for several months, then act up, the act right. Well, now it makes the buzzing noise more often than not so i decided to address it. I went to Oreilly, they didn't have one, but told me the part number.
I went across the street to Autozone, that had one on the shelf that was same part number as Oreilly. I put it in and when flipping the switch, the relay does it tick tock sounds like its working, except for there is no indication on the dash cluster that its working, nor are the actual lights working. I swap back to original and buzzing, put in new one and tick tock but no lights. Whats the deal? Is this one of those things that you have to go back to Ford? Or maybe i got a bum relay from parts house and should exchange for another to see if it works?
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I've been having an electrical issue for the past few months that I've decided to address now that the weather is getting a little warmer.
What happened is the left turn signal was blinking fast, so I assumed bad bulb, and later that day it stopped blinking fast and now I press the lever down to indicate a left turn and there is a quite loud buzzing sound. Sounds like it's coming from where the relays are, but I've replaced them and the bulbs and still nothing has changed.
I've also replaced the multifunction switch to see if that was an issue, but a new one did the same thing so I returned it.
Running lights work all around, but now there are no left blinkers, and also my left brake light doesn't come on. Pulling a trailer I have the same problem, I had the plug tested and only 3 of the pins have anything to them.
I know nothing about auto electrical systems.
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After engine is up to temperature the engine has a buzzing/whining sound just at idle. Pick up rpms and its gone. They thought it was comeing from the oil filter and changed the filter and it disappeared for a while but its back again.
Very hard to pinpoint the sound even with a styphiscope. Going back to dealer.
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My friend and I were working on my truck and he was testing my AIH relay, as he was testing it the fuel pump was clicking on and off a few times over about 10 minutes. He explained that the current must be back feeding through the system and activating the pump. After testing the relay he determined that it non-functional / broken.
When we went to start it there was a strange buzzing from the fuse box area. After testing all of the fuses and then his code scanner not being able to connect to the truck we can only figure that the PCM is done.
The truck will turn over but not start. Any time the key is in the run position the buzzing noise is there unless you pull the PCM relay or the IDM relay. He says (I know very little about this stuff) that the IDM relay is trying to close but because the PCM is fried the IDM is not getting the signal to do so....?
So what now? Do I need a new PCM? He said something about it need to be reflashed to match the old one, is that right? Are all PCMs equal? What else should I know?
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My 2002 7.3 engine makes a slow tap sound...
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I went on deployment and handed the wife to crank the truck up she did but didn't drive it so batteries didn't charge back up. I got them charged up and the truck cranked right up. I was plugging it in at night and it would start just fine the next morning. Then a week later batteries kept dying in a few hours during the day. Had to jump it again. then even when plugged in trying to crank it there was a buzzing noise and it would crank but not start. I bought new batteries and it cranked right up and drove fine until I shut it off and same problem and batteries were low again and it will crank but wont turn over. I am thinking maybe alternator.
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2001 F-350, 7.3L,
Has done this off & on for a few years and am tired of it! Noise is kind of a buzzing that seems to come from the flasher/turn signal relay. It stops buzzing when you turn on a turn signal, activate the flashers, or lift up on the shifter arm(?). Had to drive home yesterday with the flashers on! So I see from researching that it may actually be the multi-funtion switch on the steering column. So I removed that, cleaned up all the contacts, and put it back on and the buzzing did not go away.
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Well, get the engine running sound, then the drivetrain takes a crap on me. . . On my way home, about 60mph. Hear a noise from front drivers side. Gets to the point where I think I am losing a tire. Got out and checked the lugs, all clear. Got back in and the truck wouldn't move. Shifted thru all the gears, nothing.
Revved up to 1500rpm and it just sits there and shakes, like it wants to go but can't. No grinding or anything. Got a tow truck and as we were loading it, noticed that the front axle was rolling fine, but the rear was dragging. Tried it in N and D and it still wasn't rolling. Also observed drips on the flatbed and the drain plug on the transfer case was wet.
Praying that it is transmission, cuz I can just have them come get it and have it repaired under warranty. Heck its only got about 3500 miles on it. If its the hat to check? Ill be spending the rest of my evening on YT/Google. . . (Figured this was the right area to post this, cuz its a 99 7.3, I didn't see a dedicated drivetrain area so. . . )
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Recently my brother in laws truck started making a buzzing sound while running and a much louder sound after it shuts off. Trying to track down the sound. Listen to the whole video because the end is where it gets loud.
6.7 powerstroke strange noise - YouTube
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Been noticing it more recently. After shutting truck down I would say 15-30 seconds after some type of pump or solenoid starts running and does so for another 30 seconds or so ( from the frontnofmthentruck). What this might be? Also have noticed it just once after starting I was walking around the front of the truck and heard this buzzing sound once again.
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Pulled out of the restaurant I ate dinner at tonight and I lost most power and there's a loud air sucking sound. I felt around all the boots and didn't feel any air, but it was really hot and couldn't feel a whole bunch. It's a 2003 7.3 with 295k. There is a little smoke/soot coming from the turbo area, any chance that's related? I'm perplexed...
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Last November I forgot to plug my truck in and it got down to 0, my girlfriend tried unsuccessfully to jump start it. When I got home I jumped it and got it running. I took it down to a heated shop to troubleshoot the glow plug circuit. I discovered it was not getting 12v to the glow plug relay. Also I started it and tried to back it up in the shop, when put in reverse it killed the engine, not lugged it down it was like you shut the switch off.
Also I discovered if you turn the lights on it kills the engine immediately. It will not crank with the lights on either. So far I have replaced the computer,ignition switch,batteries, and cam positioning sensor. Now comes the weird part!! I decided to get it running and pull the bulbs out of the back up lights I pulled the drivers bulb first then the passengers side bulb. When I pulled the passengers side bulb it killed the engine.
It is not my daily driver so it still sits in my shop. I have a hunch it's a ground issue but I've checked and cleaned up all the grounds I can find and it still has the problem.
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Now ive got a tick tick tick tick sound from the engine. The tick increases and decreases with rpm and is present at idle. If it were a gasser i would say a lifter, honestly it kinda reminds me of a sewing machine lol.
Whatever it is as long as its not serious and my engine is solid im ok w it, I bought this truck knowing I was going to have to put work into it, I just didn't know work was going to go fall one after the other week by week from the day I got it....the previous owner must really have neglected this thing....
Hard to hear it over the sound of the engine, but its there, and is slowly getting worse
[URL]
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Towing a 5th wheel at about 10,000 lbs total. Towards the end of out 9 hour trip home and going upgrade the truck begins to loos power and the engine starts making some bad sounds. Although its hard to hear it starts about 45 seconds in and continues later when going uphill. the truck also made a very high pitched squealing/scraping sound (not a belt) like it may have been coming from the turbo. Oil temp was about 220, trans temp at 170 at the time of the event.
Truck has 216k, stock, upgraded trans cooler, original fuel pump.
Here is the video : YouTube.....
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i just installed the cups and injectors. well i have no start now i have covers off and getting no oil throw injectors passed buzz test . reserviour is full, so is under icp removed both after and had oil everywhere but also heard a gurgling sound.
Here a video of cranking : YouTube....
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2011 F-250 Lariat with 38,000 miles. What is the cause or source of humming or buzzing noise from the under the hood that starts once I turn the truck off and close the door? Lasts from 3-4 minutes and only started noticing it in the last two thousand miles or so.
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The issue: when I reach 37-40mph I have a new sound which I believe is the transmission 4R100. It sounds like a flat spot on a tire, or the sound tires make when they leave the sticker on them. The cadence of the sound is slower than the rotation of the wheels.
If I let off the accelerator, the sound stops, as soon as I add load by pressing the accelerator the sound returns. If I shift to Neutral the sound is gone.
If I coast at any speed the sound is gone. It is only audible when under load at speeds above 37-40 mph. The cadence does increase as I speed up, but it doesn't sound as fast as the motor is turning (~1900 rpm's).
I monitor the truck with torque pro using the PIDs defined here on FTE. I can see lock-up in 3rd and the shift to overdrive. When in lock-up, I see 1-7rpm TCSlip.
Watching transmission temp as reported by torque, the hottest I see is 183* pulling an enclosed 6x12 @ 75 mph. Ambient temp is 95*. Excursion currently has 240k miles on the clock.
This sound was first heard by my wife two weeks ago. I thought I had tire issues and they needed to be rotated. The sound is still present, and now identified only when the truck is in drive, and under load, regardless of me pulling a trailer.
Yesterday on my 500 mile trip, the truck hiccuped several times which I believe was around the time I was either moving in or out of overdrive. Details in a different thread: [URL] .....
Anyway, I've looked at all culprits and can't find anything with the motor, or electrical system. I can't get to a transmission shop until Monday, and won't have my AE until I get home Sunday night. I have a 500 mile run tomorrow. I checked the transmission fluid and it's at a good level, pink, and doesn't have a bad smell.
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I have an electrical problem on my 2003 f250 7.3 diesel. Sometimes it starts and sometimes it doesn't (mostly doesn't). I have two new batteries in it and have cleaned the grounds at the batteries and at the engine. When I go to start the truck all the lights in the dashboard work and it dings at me but when i crank the key nothing. I wanted to see if i was getting power to the starter and when I put my multi-meter down on the ignition wire on the starter and put my ground lead on the chassis bolt it starts every time.....I'm thinking this should not happen?? Is that a bad ground or a short or something else?
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The last week or so I have been having a screeching belt sound driving me insane in my 2003 F-250 7.3. After further investigating I have found out it is coming from my 11 month old GTP38R bearing. It has an aftermarket billet compressor wheel in it and I sold the factory wheel when I installed the Billet wheel. Where to locate a factory Garrett GTP38R wheel? All I can find online are Billet wheels or random off brands. At this point I would even trade my Billet wheel for a factory 38R wheel.
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