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Exhaust drone? #4596459
12/06/17 08:48 PM
12/06/17 08:48 PM
Joined: Feb 2011
Posts: 6,719
Hudson, NH
LeakySeals Offline OP
LeakySeals  Offline OP
Joined: Feb 2011
Posts: 6,719
Hudson, NH
After months of exhaustive searches and $$$ replacing various engine components, would appear my "rough idle" is actually exhaust drone. Is anyone else familiar with this issue??


06 Escalade 6.0L LQ9 AWD 165k M1 5w30
03 Maxima 3.5L POS 152k ST HM 10w30
Re: Exhaust drone? [Re: LeakySeals] #4596462
12/06/17 08:50 PM
12/06/17 08:50 PM
Joined: Jun 2005
Posts: 11,330
Santa Barbara, CA
bdcardinal Offline
bdcardinal  Offline
Joined: Jun 2005
Posts: 11,330
Santa Barbara, CA
Factory exhaust?


2014 Ford Mustang GT Track Pack
1995 Ford Mustang GT

Ford/Mazda Parts Counter
NRA Benefactor Member
Opinions expressed are my own.
Re: Exhaust drone? [Re: LeakySeals] #4596465
12/06/17 08:52 PM
12/06/17 08:52 PM
Joined: Dec 2016
Posts: 6,241
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,241
Waco, TX
At IDLE RPM?!?!?

Usually, exhaust systems do not resonate at such a low frequency.

Typically, build a Helmholtz exhaust resonator to fix the issue.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Exhaust drone? [Re: LeakySeals] #4596466
12/06/17 08:52 PM
12/06/17 08:52 PM
Joined: Sep 2016
Posts: 513
Vienna, VA
TinyVoices Offline
TinyVoices  Offline
Joined: Sep 2016
Posts: 513
Vienna, VA
Common with cheap aftermarket mid pipes.


1993 Toyota MR2 Hardtop N/A - 160k miles - Valvoline Max Life 5w30
2006 Toyota Matrix XR AWD (Fiancee) - 130k miles - Valvoline Max Life 5w30
Re: Exhaust drone? [Re: LeakySeals] #4596472
12/06/17 09:00 PM
12/06/17 09:00 PM
Joined: Sep 2015
Posts: 5,858
Kalifornia Kollective
BrocLuno Offline
BrocLuno  Offline
Joined: Sep 2015
Posts: 5,858
Kalifornia Kollective
How did you diagnose? Usually a rough idle will have the engine shaking under the hood. So open hood, vehicle chocked and in gear at idle and you can see the engine moving. If it's sitting still, it's something else ...


Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.
Re: Exhaust drone? [Re: LeakySeals] #4596496
12/06/17 09:16 PM
12/06/17 09:16 PM
Joined: Nov 2017
Posts: 683
South Carolina
eyeofthetiger Offline
eyeofthetiger  Offline
Joined: Nov 2017
Posts: 683
South Carolina
Aside from the cheap aftermarket replacement exhausts, this can also happen with gutted catalytic converters. Is it the Escalade or the Maximia?


2017 Ford Fiesta 1.0T - Valvoline SynPower 5W-20, Motorcraft FL910S
1988 GMC K1500 4.3/700R4 - Supertech 15W-40, Fram TG3980
1986 Ford Ranger 2.0 - uhh
Re: Exhaust drone? [Re: LeakySeals] #4596501
12/06/17 09:20 PM
12/06/17 09:20 PM
Joined: Aug 2006
Posts: 9,804
Central Washington
Colt45ws Offline
Colt45ws  Offline
Joined: Aug 2006
Posts: 9,804
Central Washington
Is it possibly a big leak and not a drone per say?


-Colton
2002 Ford Crown Vic PI 207k, Ex-Kootenai County, ID Unit #42
Down for engine swap
2003 Ford Crown Vic PI 75k
Castrol EDGE HM 5W30, Fram XG2
Re: Exhaust drone? [Re: LeakySeals] #4596520
12/06/17 09:28 PM
12/06/17 09:28 PM
Joined: Feb 2011
Posts: 6,719
Hudson, NH
LeakySeals Offline OP
LeakySeals  Offline OP
Joined: Feb 2011
Posts: 6,719
Hudson, NH
Its the Escalade 6.0 AWD. OEM exhaust. Brand new catalyst. And apparently the OEM exhaust is partly to blame. Because some claim to get rid of the moan/drone using a rerouted aftermarket exhaust for huge money. The area that wraps from the driver's side over the transmission pan vibrates for some like me. Got worse after the new 3 way cat was installed by dealer. Its real throaty, many would love it. I hate all that noise and vibration. I knocked that area it with a rubber mallet, feels just like what I feel at the gas pedal.

Supposedly 2 of these weird things hanging off the exhaust helps.




I also found this which refers to the issue

Document ID# 1820205
Subject: Exhaust Vibration,Resonance,or moan.
Also look for #PIP3121E (04/24/06)
Includes:
01-06Cad Escalade
02-06 Chev Av
99-06 Chev Silv
00-06 Chev Sub, Tahoe
99-06 GMC Sierra
00-06 GMC Yukon
03-06 Hummer

Condition is listed as "some 99-06 with single exhaust system may exhibit exhaust vibration that is engine load sensitive. Typically, this will happen just off idle to 2000 RPM on light acceleration."


06 Escalade 6.0L LQ9 AWD 165k M1 5w30
03 Maxima 3.5L POS 152k ST HM 10w30
Re: Exhaust drone? [Re: LeakySeals] #4596547
12/06/17 09:44 PM
12/06/17 09:44 PM
Joined: Feb 2013
Posts: 10,704
Phoenix, AZ
Nick1994 Offline
Nick1994  Offline
Joined: Feb 2013
Posts: 10,704
Phoenix, AZ
Have you crawled underneath to look at it? The exhaust could be rubbing on something.


2015 Hyundai Sonata 2.4L 84k Mobil 1 AFE 0w30 & OEM
2000 Toyota Camry 2.2L 230k Valvoline 5w30 & Fram Ultra
1996 Jeep Cherokee 4.0L 147k Mobil 1 HM 10w40 & Fram Ultra
Re: Exhaust drone? [Re: LeakySeals] #4596554
12/06/17 09:46 PM
12/06/17 09:46 PM
Joined: Nov 2017
Posts: 683
South Carolina
eyeofthetiger Offline
eyeofthetiger  Offline
Joined: Nov 2017
Posts: 683
South Carolina
Oh yeah, I think I know exactly the drone you are talking about now. I never had anyone complain about it, so I never had to fix it. I have seen those vibration damping weights on some models. That is probably a good fix as long as the weights are designed for this specific application.


2017 Ford Fiesta 1.0T - Valvoline SynPower 5W-20, Motorcraft FL910S
1988 GMC K1500 4.3/700R4 - Supertech 15W-40, Fram TG3980
1986 Ford Ranger 2.0 - uhh
Re: Exhaust drone? [Re: Nick1994] #4596565
12/06/17 09:53 PM
12/06/17 09:53 PM
Joined: Feb 2011
Posts: 6,719
Hudson, NH
LeakySeals Offline OP
LeakySeals  Offline OP
Joined: Feb 2011
Posts: 6,719
Hudson, NH
Originally Posted By: Nick1994
Have you crawled underneath to look at it? The exhaust could be rubbing on something.

Oh yeah. I know every inch of that truck. My baby. She's clean under there. The exhaust is very close to a mount. But thats supposedly normal. Other than that a rubber muffler mounting bracket has a small tear. The rest has no rust, like new.


06 Escalade 6.0L LQ9 AWD 165k M1 5w30
03 Maxima 3.5L POS 152k ST HM 10w30
Re: Exhaust drone? [Re: LeakySeals] #4596684
12/07/17 12:30 AM
12/07/17 12:30 AM
Joined: Jul 2008
Posts: 457
Maryland USA
rubberchicken Offline
rubberchicken  Offline
Joined: Jul 2008
Posts: 457
Maryland USA
I would go with the exhaust weights: cheap fix. Not sure why you would need 2 though, but whatever others have claimed works, I would do that and be done with it.
They are just painted , so I would not expect them to last more than 5 years.

Re: Exhaust drone? [Re: LeakySeals] #4596736
12/07/17 03:40 AM
12/07/17 03:40 AM
Joined: Dec 2013
Posts: 3,989
Manchester, England
Olas Offline
Olas  Offline
Joined: Dec 2013
Posts: 3,989
Manchester, England
Fit an external tach to verify idle rpm.


Cable ties should hold it
Re: Exhaust drone? [Re: LeakySeals] #4596919
12/07/17 10:01 AM
12/07/17 10:01 AM
Joined: Feb 2011
Posts: 6,719
Hudson, NH
LeakySeals Offline OP
LeakySeals  Offline OP
Joined: Feb 2011
Posts: 6,719
Hudson, NH
It has a tach. It does happen 1800-2k rpms under certain conditions. Vibration runs right up your leg.. lol


06 Escalade 6.0L LQ9 AWD 165k M1 5w30
03 Maxima 3.5L POS 152k ST HM 10w30
Re: Exhaust drone? [Re: LeakySeals] #4601053
12/11/17 09:33 PM
12/11/17 09:33 PM
Joined: Dec 2016
Posts: 6,241
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,241
Waco, TX
LOL, your issues wan't "acoustic drone", you are experiencing an unintentional mechanical harmonic.

Try the weights - they are cheap.

ANY amount of mass WILL affect the frequency that the harmonic occurs.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
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