rough idle - Mustang Evolution

Go Back   Mustang Evolution > 4 Cylinder | V6 | Classic Mustangs || Tech and Talk > 2011-2014 V6 Mustang



Reply
 
Thread Tools Search this Thread
Please support our sponsors and let them know you heard about them here!
Old 02-29-2012, 04:42 PM   #1
Registered Member
Regular
 
NickAP12589's Avatar
 
Join Date: Jan 2012
Region: Maryland
Posts: 107
rough idle

So I have a 2012 v6 MT. Its got about 2600mi and recently, say within past 200mi I have noticed the idle is slightly rough. It drops about 100-200 rpms every few seconds for about a second... I don't know if this is something I should worry about or if I'm just being picky.. but I don't remember it doing this for the first 2500mi. What do you guys think?
NickAP12589 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 02-29-2012, 04:51 PM   #2
Moderator Emeritus
Regular
 
deadsp0t's Avatar
 
Join Date: Aug 2011
Location: MidWorld
Region: Other
Posts: 4,786
Take it to the dealer.
__________________
That's unimpressive
deadsp0t is offline   Reply With Quote
Old 02-29-2012, 04:59 PM   #3
Registered Member
Regular
 
phobik's Avatar
 
Join Date: Sep 2011
Region: New York
Posts: 472
Quote:
Originally Posted by NickAP12589
So I have a 2012 v6 MT. Its got about 2600mi and recently, say within past 200mi I have noticed the idle is slightly rough. It drops about 100-200 rpms every few seconds for about a second... I don't know if this is something I should worry about or if I'm just being picky.. but I don't remember it doing this for the first 2500mi. What do you guys think?
Any aftermarket parts?
phobik is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 02-29-2012, 05:09 PM   #4
Registered Member
Regular
 
NickAP12589's Avatar
 
Join Date: Jan 2012
Region: Maryland
Posts: 107
Nope bone stock at the moment. The dealer is kind of a far drive so if there's something in particular I should check id rather do that
NickAP12589 is offline   Reply With Quote
Old 03-01-2012, 12:06 AM   #5
Registered Member
Regular
 
Whitestang93's Avatar
 
Join Date: Feb 2012
Region: Florida
Posts: 143
Even though I don't have a new mustang, I have a 99 v6 and mine does that exact same thing sometimes. It's never given me a problem but If in doubt just take it to the dealer
Whitestang93 is offline   Reply With Quote
Old 03-03-2012, 10:33 AM   #6
Registered Member
Regular
 
fordfan100's Avatar
 
Join Date: Feb 2011
Region: South Carolina
Posts: 607
Mine does it too i have an 11 with 15000 miles on i took it too the dealer and they said it had something to do with the variable cam timing they said it was normal
fordfan100 is offline   Reply With Quote
Old 03-03-2012, 01:44 PM   #7
Registered Member
Regular
 
NickAP12589's Avatar
 
Join Date: Jan 2012
Region: Maryland
Posts: 107
So no fix? They just left it as is?
NickAP12589 is offline   Reply With Quote
Old 03-03-2012, 02:46 PM   #8
Registered Member
Regular
 
fordfan100's Avatar
 
Join Date: Feb 2011
Region: South Carolina
Posts: 607
Re: rough idle

this was back in september of 2011 there may be a fix by now. but i dont notice now
fordfan100 is offline   Reply With Quote
Old 03-03-2012, 03:16 PM   #9
Registered Member
Regular
 
NickAP12589's Avatar
 
Join Date: Jan 2012
Region: Maryland
Posts: 107
Ok well ill probably take it in in a week or two and see what they say
NickAP12589 is offline   Reply With Quote
Old 03-03-2012, 05:58 PM   #10
Road Trip!
 
Join Date: Mar 2012
Region: Georgia
Posts: 225
You need to run some seafoam through it and use chevron gas for the next couple tanks. It will go away. Just carbon build up the way the new 3.7 is built its more prone to rough idle from a dirty engine
iwalkaline58 is offline   Reply With Quote
Old 03-03-2012, 07:58 PM   #11
Registered Member
Regular
 
NickAP12589's Avatar
 
Join Date: Jan 2012
Region: Maryland
Posts: 107
Really already at only 2600 miles?
NickAP12589 is offline   Reply With Quote
Old 03-03-2012, 08:08 PM   #12
Road Trip!
 
Join Date: Mar 2012
Region: Georgia
Posts: 225
Believe it or not the first few thousand on a motor is the worst miles ever put on a car. Coming from the factory everything is brand new and even though you dont need an extensive break-in there will be metal shavings in the engine and tiny pieces floating around from the wear patterns. Thats why its important to get that first oil change around 1500 miles. But no seafoam if only 2600 or so miles just some techron and youll be good. After wear patterns get worn in it will run smooth as silk!
iwalkaline58 is offline   Reply With Quote
Old 03-03-2012, 08:09 PM   #13
The Blue Dragon
Regular
Supporter
 
GrabberBlue5.0's Avatar
 
Join Date: Feb 2012
Location: Louisville
Region: Kentucky
Posts: 5,661
I work with a guy that is a senior master tech at ford, he worked there for 22 yrs. he told me that many of the modular motors have a very similar thing that happen like that. He mentioned it when I was showing off my 11 gt. Nothing unusual and nothing to worry about. He said it just happens and no one knows why. Now I know that the 3.7 is a variation of the duratec, but I can see how it might happen to those motors too.
__________________
New quick exhaust video

AUGUST 2012 MOTM!!!!
GrabberBlue5.0 is offline   Reply With Quote
Old 03-03-2012, 08:16 PM   #14
Road Trip!
 
Join Date: Mar 2012
Region: Georgia
Posts: 225
+1 german cars idle just as bad but just overload the car with useless insulation. lol
iwalkaline58 is offline   Reply With Quote
Old 03-21-2012, 03:21 PM   #15
Registered Member
Regular
 
NickAP12589's Avatar
 
Join Date: Jan 2012
Region: Maryland
Posts: 107
Re: rough idle

so I have noticed that I can trigger the exact idle tremble I was talking about by opening or closing the window.... soo it appears its caused by some device drawing extra power through the accessory belt. (I'm guessing when it does it and I'm not opening/closing window, it's the fan or something of the sort...)
NickAP12589 is offline   Reply With Quote
Old 03-19-2014, 07:16 PM   #16
Registered User
Newbie
 
srouxd162's Avatar
 
Join Date: Feb 2012
Region: Louisiana
Posts: 12
Quote:
Originally Posted by NickAP12589 View Post
so I have noticed that I can trigger the exact idle tremble I was talking about by opening or closing the window.... soo it appears its caused by some device drawing extra power through the accessory belt. (I'm guessing when it does it and I'm not opening/closing window, it's the fan or something of the sort...)
Did you ever get the rough idle issue resolved? I ask because my car (2012 3.7) has it too.
srouxd162 is offline   Reply With Quote
Old 03-19-2014, 08:05 PM   #17
Registered Member
Regular
 
ak_stang's Avatar
 
Join Date: Jun 2012
Region: Alaska
Posts: 203
You could try the idle relearn and see if it helps
ak_stang is offline   Reply With Quote
Old 03-20-2014, 06:40 AM   #18
Registered User
Newbie
 
srouxd162's Avatar
 
Join Date: Feb 2012
Region: Louisiana
Posts: 12
Quote:
Originally Posted by ak_stang View Post
You could try the idle relearn and see if it helps
I have. It doesn't.
srouxd162 is offline   Reply With Quote
Old 03-29-2014, 07:46 PM   #19
Registered Member
Regular
 
NickAP12589's Avatar
 
Join Date: Jan 2012
Region: Maryland
Posts: 107
I learned to just ignore it. Never had any real problems and i just don't notice it anymore

Sent from my XT1060 using Mustang Evolution mobile app
NickAP12589 is offline   Reply With Quote
Old 04-04-2014, 09:00 AM   #20
Registered Member
Regular
 
ebgonzalez1's Avatar
 
Join Date: Aug 2012
Region: Texas
Posts: 371
I had a rough idle when I would fill up my mustang... I found out it was the return line that would get gas inside and would cause the idle go up and down not a big problem I just stopped filling up all the way up to stop the overkill of the return line

Sent from my SGH-T999 using Mustang Evolution mobile app
__________________
"Just a lil Sixxer...."
ebgonzalez1 is offline   Reply With Quote
Old 04-07-2014, 12:11 PM   #21
Registered User
Newbie
 
Marine8d's Avatar
 
Join Date: Apr 2014
Location: Newport News
Region: Virginia
Posts: 13
My 14 GT just started doing it, it only has 2000 mi. The only Mod I got is a CAI no tune (I'm waiting for other mods and the warranty to expire) some times it gets as low as 100 RPM enough to make the car shake.
Now, it is a rainy and chilly day here, could the weather have anything to do with it?
Marine8d is offline   Reply With Quote
Reply

Lower Navigation
Go Back   Mustang Evolution > 4 Cylinder | V6 | Classic Mustangs || Tech and Talk > 2011-2014 V6 Mustang

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Engine shaking at idle and driving stangin Pre-2005 V6 Mustang 18 03-22-2012 03:46 PM
Rough idle normal? ColeJohnson 1996-2004 Mustang GT 18 02-20-2012 04:12 PM
AOD to T5 Swap & Idle, Bucking Issues Trojan Horse 1979-1995 Mustang GT 5 02-06-2012 10:47 AM
Idle problem captain78 1979-1995 Mustang GT 3 01-25-2012 07:10 AM
Rough idle Blackedout Pre-2005 V6 Mustang 0 01-23-2012 05:27 PM

» Like Us On Facebook



05:03 AM


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0

MustangEvolution.com is in no way associated with or endorsed by Ford Motor Company.