Hey guys,
Recently got some exhaust work done which may or not be related to my issue. Now I notice a slight howl around 40 mph when maintaining that speed. Any one else have this same howl?
That wouldn't happen to be the dreaded drone noise i keep hearing about would it?
its not exhaust drone, it sounds either gear related or wind related. its not dependent on rpm. doesn't change if I turn left or right. has to be on a smooth road to hear it otherwise road noise is louder. it comes in and out, always the same pitch and more or less the same volume.
possible tire noise?
Quote from: CroR1 on October 14, 2015, 12:02:28 AM
possible tire noise?
yes possible, will try and rotate tires
How many miles? Does the noise go away if you slip the car into neutral while rolling? What about applying brakes or going around turns at high speed? Front of the car or the rear? Any idea which side it's coming from?
Just going to make a guess before you answer those questions, but I'm going to go with a bad wheel bearing.
Check that the gaskets are sealing properly, and that if any new welds have been made, that they are holding up.
Agree with MANU, it sounds like you have an air leak in the exhaust,start it up in the am when its cold and let it warm up for 10 min,then just move the car so you can check the amount of h20 on the floor,mine only leaks by the mufflers. Z
Rotated the tires, no changes. I do however notice if i Rev in park to 1500 the resonator vibrates quite a bit. Changing gears doesn't change anything, i would assume that changes exhaust flow. if i pop it in neutral, it doesn't affect the sound. The trans was pulled and resealed 10k ago all new seals. All fluids inc ptu changed regularly. Ill check for exhaust leaks and try and stuff a rag in one muffler and see if that changes anything. 50k miles. I should add that going over bumps it stops it briefly and accelerating more than maintaining 40 mph it also goes away.
Setting cruise to 42 mph its pretty much constant on a smooth flat road. I also drove about 45 and turned off the motor and had it in neutral, still there. Has to be drivetrain related.
Have you ever had the half-shaft recall checked/inspected at all? any visible signs of any leaks coming from the front right. Z
Quote from: polskifacet on October 14, 2015, 11:34:31 AM
Setting cruise to 42 mph its pretty much constant on a smooth flat road. I also drove about 45 and turned off the motor and had it in neutral, still there. Has to be drivetrain related.
Sounds just like a wheel bearing going out. How many miles and have they ever been replaced? Mine had very similar symptoms at about 70k miles and it was the bearing. Very low pitched hum that started around 40-45 mph. Jacked the car up and tested the wheels and there wasn't any play, but it was still a bad bearing. Replaced it and the hum was gone.
My vote is on a bearing, whether a wheel hub, or any bearings related to the drivetrain, rear or front differentials.
Best way to find where it's coming from is to lift the car up on the lift and put in D and get it to 40 mph and see where it's coming from. If it is bad it will recreate the noise.
Quote from: ZSHO on October 14, 2015, 11:43:13 AM
Have you ever had the half-shaft recall checked/inspected at all? any visible signs of any leaks coming from the front right. Z
Yes was inspected.
I'm going on a 3500 mile road trip Friday. This should be a good stress test. Will report back with any changes.
Quote from: ZSHO on October 14, 2015, 07:09:03 AM
Agree with MANU, it sounds like you have an air leak in the exhaust,start it up in the am when its cold and let it warm up for 10 min,then just move the car so you can check the amount of h20 on the floor,mine only leaks by the mufflers. Z
2 puddles of water where the cat delete was done. Has to be the source. Will get redone in a couple weeks, will report back!
Quote from: polskifacet on October 14, 2015, 08:43:03 PM
Quote from: ZSHO on October 14, 2015, 07:09:03 AM
Agree with MANU, it sounds like you have an air leak in the exhaust,start it up in the am when its cold and let it warm up for 10 min,then just move the car so you can check the amount of h20 on the floor,mine only leaks by the mufflers. Z
2 puddles of water where the cat delete was done. Has to be the source. Will get redone in a couple weeks, will report back!
That should be your cause right there,any type of codes set?? Best of luck and keep us updated. Z
(http://gompka.selfip.com:55698/uploader/uploads/Pictures/SHO/leak.jpg)
That seems a bit excessive,while your at the shop would also consider installing new gaskets if not done so already for a secure tight seal, (X2 needed). Z http://www.tascaparts.com/ford/taurus/7t4z9450aa/2013-year/sho-trim/3-5l-v6-gas-engine/exhaust-system-cat/exhaust-components-scat/?part_name=muffler-and-pipe-gasket&position=left (http://www.tascaparts.com/ford/taurus/7t4z9450aa/2013-year/sho-trim/3-5l-v6-gas-engine/exhaust-system-cat/exhaust-components-scat/?part_name=muffler-and-pipe-gasket&position=left) http://www.tascaparts.com/auto-parts/2013/ford/taurus/sho-trim/3-5l-v6-gas-engine/exhaust-system-cat/exhaust-components-scat (http://www.tascaparts.com/auto-parts/2013/ford/taurus/sho-trim/3-5l-v6-gas-engine/exhaust-system-cat/exhaust-components-scat)
Yup got new ones. Also decided to put in a magnaflow resonated X in place of the stock resonator since he is going to have to take it apart and weld anyway.
3500 mile commitment to the "new" setup. Best of luck!
Sound is still there after getting the exhaust fixed. I did some more research and on the EB F150 forums it seems to be more common. Could be linked to VTA.
The SHO has a history of making some weird and odd noises when the bov are vta,from duck to geese sounds,you could always put the front bov back to stock since its the easiest one to reinstall just to hear if the howl noise is somewhat less pronounced at 40mph,best of luck and keep us updated. Z
I would also try to rule out if there is any noise present by the brake booster(check valve)could have a leak contributing to the noise your experiencing,while the car is running try to listen for any hissing sound by the firewall area,the hose highlighted below could have a leak. Z
Take it to a garage with lift, have them fire it up and put in D, give it a gas, and you should be able to follow the noise from under the car. my guess is on a bearing, whether wheel, PTU/differential, or....
Put the blow off valves back to recirculate. Howl still exists. Putting on the winter tires soon, will report back once that happens.
I would keep monitoring for any codes set,sometimes they certainly take a while to appear on these cars. Z
I get a drive train howl similar to gear whine when I first drive my car out of my neighborhood in the morning. Its very faint. I'm guessing its part of the awd system.
Quote from: Vortech347 on November 13, 2015, 04:46:37 PM
I get a drive train howl similar to gear whine when I first drive my car out of my neighborhood in the morning. Its very faint. I'm guessing its part of the awd system.
sound like it's time to change the PTU/RDU fluid.
Quote from: glock-coma on November 13, 2015, 05:10:15 PM
Quote from: Vortech347 on November 13, 2015, 04:46:37 PM
I get a drive train howl similar to gear whine when I first drive my car out of my neighborhood in the morning. Its very faint. I'm guessing its part of the awd system.
sound like it's time to change the PTU/RDU fluid.
I just changed them 10ish k ago. Seems to be between 2k and 1k rpm. I get a kind of piuu sound if it up shifts in that range. I don't hear it anywhere else.
Hey Guys,
So after driving the car more, I have howling at 1.5k and 3k. At 3k it's definitely more instrument/tuning fork like. It sounds like it's coming from up front, the stock DPs. Weird that no one else has this with a straight through exhaust.
Retorque the bolts in the exhaust system? Doublegasket if necessary between downpipes & catback.
Exactly what I did last night. No signs of any leakage. Weird, I'll just have to live with it. I got the whole section redone where the 3rd cat sits and we made sure all the pipes were de burred etc. It sounds like its coming from further up.
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