Weird smell at high rpms? - Mustang Evolution

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Old 12-29-2011, 12:18 PM   #1
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Weird smell at high rpms?

Is there anyone else that notice a different smell at high rpms, not like burning rich or anything almost like there is some blow by but not an oil smell. Just wondering if there is anyone else with this or is it a normal thing on the new 5.0. My 87 has a rich smell to it but that's normal but this is almost like a ethanol smell, actually had a guy ask me if I was running ethanol after I pasted him on a run
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Old 12-29-2011, 08:51 PM   #2
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Anyone? Any thoughts?
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Old 12-29-2011, 08:54 PM   #3
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Auto or stick?
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Old 12-29-2011, 08:56 PM   #4
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I had the same experience with my 96 gt. it had about 150k miles so I figured it would be too dangerous to keep doing it. Lol. So I kept it at low Rpms
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Old 12-29-2011, 09:01 PM   #5
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Stick and high rpms I mean like no higher then 6500 but above 4000 but only at full throttle also

---------- Post added at 09:01 PM ---------- Previous post was at 09:00 PM ----------

This is a 2011 gt with 13000 miles on it
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Old 12-29-2011, 09:06 PM   #6
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Some of the basics to check are trans fluid level diff oil level and engine oil level u can stand behind the car if it makes the smell at high rpms in nutrul or park and look for pressure leaks white smoke out the exhaust or blue smoke if it only does it when in drive it could be the rear diff but if an auto it can also be more serious like a belt slipping or some thing also look for pin hole coolent leaks. Its hard to narrow it down after all i dont know what your car is smelling like and every distenct smell tells something else (burning coolent vs oil for example) can u be more discreptive of the smell like compare it to something similer?

---------- Post added at 07:06 PM ---------- Previous post was at 07:02 PM ----------

As a stike id allmost like to say clutch cause they can slip at high rpms when worn out and are quit stinky almost like a urine smell but not quit but very destinked if i could shove my nose threw the screen i could tell u in a heart beat.
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Old 12-29-2011, 09:06 PM   #7
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No where near burning coolant or burnt oil but maybe oil vapor but not sure never smell a lean condition before but im leaning more to that type of smell. Its only under a load at full throttle all levels are good oil is just a hair under the full mark which I just changed at 12000 miles with RP
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Old 12-29-2011, 09:06 PM   #8
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Yeah, I smell a similar oder when WOT at high RPM's. Mostly when I'm cruising 130+ (on the track... Of course.)
I'm assuming it's burning fuel at a rapid rate making the exhaust gases rich. I like the smell. It's intoxicating.
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Old 12-29-2011, 09:23 PM   #9
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Now the clutch smell might be a concern also never thought of that being the smell besides the burning paper smell of me burning up my clutch in my toyota pickup when I was 15

---------- Post added at 09:11 PM ---------- Previous post was at 09:08 PM ----------

I do have a problem with the clutch not fully disengaging but im waiting on my dealership to call me back with a answer because im the only stick new 5.0 in my town

---------- Post added at 09:23 PM ---------- Previous post was at 09:11 PM ----------

I just was wondering if anyone else has had the same thing happen is having the same thing and is it a normall
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Old 12-29-2011, 09:32 PM   #10
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I have the same thing, and it's only after putting the vehicle under a hard load/long pull. I thought it was detail spray (Armor-All or something like it) on the hot exhaust initially after I bought it, because of the smell. But it continues. I have 19k miles on it now, and no drivability issues. I do notice that the stock tires (P-Nero Zero) are starting to look a little bare on the rear could be related, but I doubt it.
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Old 12-29-2011, 09:36 PM   #11
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Well my tires were about the same but haven't been able to drive it too hard because of the icy roads
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Old 12-29-2011, 09:48 PM   #12
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We haven't had winter in California yet. Basking in the 65 degree sunny days!!
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Old 12-29-2011, 09:54 PM   #13
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Quote:
Originally Posted by MedxGT
We haven't had winter in California yet. Basking in the 65 degree sunny days!!
I'm loving it Man I live in the bay area and the weather is good just rains about a few times a month. So I can drive my mustang with out having it slide all over lol
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Old 12-29-2011, 10:00 PM   #14
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Quote:
Originally Posted by MedxGT
We haven't had winter in California yet. Basking in the 65 degree sunny days!!
I'm jealous!

---------- Post added at 09:00 PM ---------- Previous post was at 08:55 PM ----------

Quote:
Originally Posted by Mweigt07
Is there anyone else that notice a different smell at high rpms, not like burning rich or anything almost like there is some blow by but not an oil smell. Just wondering if there is anyone else with this or is it a normal thing on the new 5.0. My 87 has a rich smell to it but that's normal but this is almost like a ethanol smell, actually had a guy ask me if I was running ethanol after I pasted him on a run
I've seen many others who post mentioning the same issue in other threads, so it's definitely not just you! It's hard to narrow down exactly what it is, especially seeing how everything on these cars is new. Could be something as simple as different exhaust gasket material putting off a smell when super heated after a WOT pass. Does it smell anything like new exhaust/ headers after install?
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Old 12-29-2011, 10:06 PM   #15
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Almost smells like hot coolant, just a little sweeter. Just my perspective.

If it was a clutch, how about some feedback from the guys with dyno experience? Does the same smell happen when it's chained down and pulling?
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Old 12-29-2011, 11:43 PM   #16
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Well I work with burnt coolant pretty often being that I work on diesel generators that run about a thousand hours before a coolant change and its kinda of a coolant smell with the glycol smell to it

---------- Post added at 11:43 PM ---------- Previous post was at 11:42 PM ----------

Without the glycol smell to it
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Old 12-30-2011, 05:01 AM   #17
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Im still leaning towards clutch esspecially if ur having some ingageing/disingageing issues id get it checked out. As for on a dyno chained or not and on the road shouldnt matter if its gunna slip and stink its gunna any time ur rpms get on it and it will only get worse and worse.
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Old 12-30-2011, 08:16 AM   #18
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Well the clutch issue here in the minot is stunning the dealership because they have no idea why it feels hard to shift but they wont take it apart again because they already did the bolt tsp
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Old 12-30-2011, 03:37 PM   #19
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Quote:
Originally Posted by Hawk
Im still leaning towards clutch esspecially if ur having some ingageing/disingageing issues id get it checked out. As for on a dyno chained or not and on the road shouldnt matter if its gunna slip and stink its gunna any time ur rpms get on it and it will only get worse and worse.
+1
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Old 12-31-2011, 09:00 AM   #20
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Re: Weird smell at high rpms?

Being in California, could it be the smell of overheated Catalytic Convertors ?? I get the same smell on occasion & that's what the smell reminds me of.
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Old 12-31-2011, 09:48 AM   #21
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Well im not familiar with that smell but it is strong enough when I pass somebody at full throttle they smell it
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Old 12-31-2011, 11:28 PM   #22
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The only time i ever smelt something weard from my cats was when i worked at a ford dealer and a brand new 06 gt vert came in and i took it for a test spin a couple hard launches later i smelt sort of a burning plasticky smell i traced down to the cats. Most of the time if the cats are a problem its cause ones come loose inside and rattles around making sort of a pinging rattleing sound that makes u think ur motors gunna go boom boom. Usually this is accompained by a loss in throttle responce because whats happening is the inside of the cat is bouncing around under exhoust pressure and basiclly covering the hole stopping flow. Id also make sure all fluid levels are not over full
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Old 01-03-2012, 06:27 AM   #23
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Re: Weird smell at high rpms?

Yessir!!! I get that smell too.......... I found out the smell was coming from the passengers crapping themselves at WOT!!!!!! Sadly it is not covered under warranty.
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Old 01-03-2012, 07:03 AM   #24
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I used to get that smell too. My conclusion was it was the cats. I would get a strong odor from the time it was new until about 7,000 miles. I only got it when the motor was brought to redline and usually at high speed. Now I have 8800 miles and smell is very mild. So it starts to go away with more miles.
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Old 01-03-2012, 03:45 PM   #25
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Quote:
Originally Posted by Ravnus
I used to get that smell too. My conclusion was it was the cats. I would get a strong odor from the time it was new until about 7,000 miles. I only got it when the motor was brought to redline and usually at high speed. Now I have 8800 miles and smell is very mild. So it starts to go away with more miles.
I've heard the cats too. Seems like a common problem.
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Old 01-03-2012, 06:22 PM   #26
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Well mine only started at 11000 miles
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Old 01-03-2012, 08:32 PM   #27
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Re: Weird smell at high rpms?

Must be the higher RPM, distinct smell in the garage after some WOT on the way home from work, hmmm, hope the wife doesnt put 2 and 2 together!
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Old 01-03-2012, 09:27 PM   #28
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Re: Weird smell at high rpms?

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Must be the higher RPM, distinct smell in the garage after some WOT on the way home from work, hmmm, hope the wife doesnt put 2 and 2 together!
Interesting thought, my Pontiacs (older 1970 etc) always have had a specific smell, even different cars, our Harleys are the same way, not sure why but you can always identify what was run last in the gararge............suppose this may be the same case? (guessing the CATS?)
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Old 01-03-2012, 09:35 PM   #29
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At WOT it will run rich. Probably just a small amount of unburnt fuel in the exhaust.
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Old 01-04-2012, 07:55 AM   #30
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Re: Weird smell at high rpms?

Sounds like another convincing argument for putting on an off-road x-pipe...
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Old 01-05-2012, 01:57 AM   #31
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Sounds like another convincing argument for putting on an off-road x-pipe...
Na M.A.C. Prochamber ftw!!!
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Old 01-05-2012, 07:29 AM   #32
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Re: Weird smell at high rpms?

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Na M.A.C. Prochamber ftw!!!
Do they even make those for the 5.0? I'm still not sure I'd want one without knowing more about how they are setup inside. Is there a reason that this is better than the traditional x-pipes that most people run?
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Old 01-05-2012, 09:32 AM   #33
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Well all I want is an offroad h-pipe for my 2011 that's matches up to the magnaflow competion exhaust
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Old 01-05-2012, 10:20 AM   #34
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Re: Weird smell at high rpms?

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Originally Posted by Mweigt07 View Post
Well all I want is an offroad h-pipe for my 2011 that's matches up to the magnaflow competion exhaust
I think Lethal sells an off-road H, how far back does the magnaflow go?
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Old 01-05-2012, 10:38 AM   #35
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I think Lethal sells an off-road H, how far back does the magnaflow go?
If its the catback, I think it mates directly with the stock h-pipe.
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