Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - Reply to Topic
Ford Focus Forum
HomeContact UsAbout UsGalleryDiscussion ForumsMarketplace


Go Back   Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum > Ford Focus Third Generation > MK3 Focus > Idle vibration

MK3 Focus The place to chat about general questions, window tinting, exterior body, interior and lighting upgrades for the third generation 2012-Current Focus.

Search This Forum | Image Search | Advanced Search    
Ford Focus Tire & Wheels FocusFanatics Merchandise

Thread: Idle vibration Reply to Thread
Title:
  
Message:
Post Icons
You may choose an icon for your message from the following list:
 

Register Now

In order to be able to post messages on the Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Additional Options
Miscellaneous Options

Topic Review (Newest First)
10-08-2012 12:20 PM
FordService
Quote:
Originally Posted by Michaelc1220 View Post
...When im sitting at a light with my foot on the break, occasionally there is a noticeable vibration. You can feel this from both the drivers and passenger side...
Hi Michaelc1220,

I would recommend that you make an appointment at your dealership. Ford certified techs are in the best position to diagnose and repair your vehicle, in addition to giving you some peace of mind.

I'm happy to escalate your case to your region's Customer Service Manager; just send me a PM with your VIN, dealer, mileage, and daytime contact number. I'll get things rolling!

Quote:
Originally Posted by blank102 View Post
I think it has to do with the direct injection.
Quote:
Originally Posted by Rememo View Post
I've seen some posts fly by about bad motor mounts. That could cause vibes at idle.
Quote:
Originally Posted by SportyChick View Post
This was one of the first things I noticed when I picked up my "new" used Focus a couple of weeks ago (I never noticed it on the test drive though). I would be sitting at the lights with my foot on the brake and the car would be vibrating during idle.

I took my car in to a Ford dealership this past Wednesday and told them about it and they fixed it. The previous owner of the car would have received (so I'm told) notification for 2 recalls, one being the sync and the second being reprogramming the PCM, TCM and ABS module. This second recall is what fixed the shaking car during idle and it in fact did fix mine, recall 12B37B for your reference...
Quote:
Originally Posted by paul21 View Post
If your car feels mostly smooth then random harder jerks at idle, you should reset the car computer by disconnecting the battery for ~30 minutes or something and letting the engine idle for 5 minutes when you start it back up.

If your idle is smooth but causes a lot of vibration in general, then it's the motor mounts...
Thanks, everyone, for bringing good information to the table. I'm sure Michaelc1220 appreciates it!

Crystal
10-06-2012 03:02 PM
suss6052
Quote:
Originally Posted by paul21 View Post
If your car feels mostly smooth then random harder jerks at idle, you should reset the car computer by disconnecting the battery for ~30 minutes or something and letting the engine idle for 5 minutes when you start it back up.

If your idle is smooth but causes a lot of vibration in general, then it's the motor mounts.

12B37 increases idle RPM from 700 to 800.
My car was built after the date range for the 12b37 update, but still idles at approximately 680 rpm with the a/c off and in park with my foot off the brake, or 750 rpm foot on the brake in gear with or without the a/c on approximately. At no point is the idle over 800 rpm per the digital tachometer displayed in test mode. Once you take your foot off the brake the rpms increase as the car begins to engage the clutch for 1st gear.
10-06-2012 02:43 PM
paul21 If your car feels mostly smooth then random harder jerks at idle, you should reset the car computer by disconnecting the battery for ~30 minutes or something and letting the engine idle for 5 minutes when you start it back up.

If your idle is smooth but causes a lot of vibration in general, then it's the motor mounts.

12B37 increases idle RPM from 700 to 800.
10-06-2012 12:17 PM
suss6052
Quote:
Originally Posted by Michaelc1220 View Post
I see now. But I have noticed that sometimes when I let the break out a little, the vibrating becomes more noticeable
Probably because the car thinks you want to go and prepares to engage the clutch? Not 100% certain there.
10-06-2012 12:15 PM
Michaelc1220
Quote:
Originally Posted by suss6052 View Post
With the DCT the car has to be in neutral at idle or else it would stall. The same as letting out the clutch on a manual transmission car at zero vehicle speed. If you had a torque converter the engine is separated from the wheels via the torque converter and allowing for the slippage cooled by fluid trapped inside the gearbox. Since the mechanism on the DCT is mechanically similar to a manual gearbox.
I see now. But I have noticed that sometimes when I let the break out a little, the vibrating becomes more noticeable
10-05-2012 10:46 PM
suss6052
Quote:
Originally Posted by Michaelc1220 View Post
I was thinking maybe it had something to do with the whole "switching to neutral" thing when your on the break but I never really completely understood how that worked. Im talking about like when you sitting on an incline and slowly let off the break; it will roll back a little until you fully let off the break
With the DCT the car has to be in neutral at idle or else it would stall. The same as letting out the clutch on a manual transmission car at zero vehicle speed. If you had a torque converter the engine is separated from the wheels via the torque converter and allowing for the slippage cooled by fluid trapped inside the gearbox. Since the mechanism on the DCT is mechanically similar to a manual gearbox.
10-05-2012 10:37 PM
jdetzel
Quote:
Originally Posted by suss6052 View Post
I haven't noticed a difference in idle between a/c on and a/c off at idle with a foot on the brake, but idling in park with the foot off the brake seems to be about 680 rpm target idle with the DCT at least vs the 750 with the foot on the brake with or without the a/c on.
It has just been the last few weeks that it has been cool enough here to turn off the A/C. So I just noticed it. That is in gear, foot on the brake at idle and I don't remember at what rpm but 680 to 750 sounds about right. It picks up about 50 to 100 rpm when the A/C compressor comes on. So I would say at 680 it is a little rough and at 750 it is smooth.
The other thing I notice is the rough idle is not consistent, it seems to modulate a little.
10-05-2012 10:33 PM
Michaelc1220 I was thinking maybe it had something to do with the whole "switching to neutral" thing when your on the break but I never really completely understood how that worked. Im talking about like when you sitting on an incline and slowly let off the break; it will roll back a little until you fully let off the break
10-05-2012 10:23 PM
suss6052
Quote:
Originally Posted by jdetzel View Post
With the A/C on mine idles very smooth. Turn off the A/C, the RPMs drop a little and I get a vibration. Not bad but noticeably different. It doesn't seem the be a problem but it is a little annoying. The next time I am at the dealer I thought I might ask if the idle could be adjusted.
I haven't noticed a difference in idle between a/c on and a/c off at idle with a foot on the brake, but idling in park with the foot off the brake seems to be about 680 rpm target idle with the DCT at least vs the 750 with the foot on the brake with or without the a/c on.
10-05-2012 10:21 PM
jdetzel With the A/C on mine idles very smooth. Turn off the A/C, the RPMs drop a little and I get a vibration. Not bad but noticeably different. It doesn't seem the be a problem but it is a little annoying. The next time I am at the dealer I thought I might ask if the idle could be adjusted.
This thread has more than 10 replies. Click here to review the whole thread.

Posting Rules
You may post new threads
You may 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


All times are GMT -5. The time now is 05:27 PM.


Copyright 2002-2014 FocusFanatics.com. All Rights Reserved : Privacy Policy : Advertise Information

Focus Fanatics Ford Focus Forum offers many fun ways for you to engage with other Ford Focus Owners from across the world. Whether it be about the aftermarket performance modifications, technical how-to's, European tuned suspension or awesome fuel economy similar to the Audi S3, Ford Fusion and Acura TLX. You can find all Ford Focus and Focus ST related information here. Join our Ford Focus discussion forums and chat with local Focus enthusiasts in your area. Challenger Hellcat - Charger Hellcat