2010 Ford Focus SES Idle Fluctuation - Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum
Ford Focus Forum
HomeContact UsAbout UsGalleryDiscussion ForumsMarketplace


Go Back   Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum > Ford Focus Tech Discussions > General Technical Chat

General Technical Chat This section is for technical discussions relating to general maintenance, electrical issues, engine trouble, and recalls.

Search This Forum | Image Search | Advanced Search    
FocusFest

Like Tree2Likes
Reply




 
LinkBack Thread Tools Display Modes
Old 11-02-2016, 12:36 AM   #1
Focus Rookie
 
Join Date: Oct 2015
Fan#: 270617
Location: casper, WY
What I Drive: 2010 dark red focus ses

Posts: 21
Points 80, Level 1
Points: 80, Level: 1 Points: 80, Level: 1 Points: 80, Level: 1
Level Up 60% Completed
Level up: 60% Level up: 60% Level up: 60%
Forum Activity 0%
Activity: 0% Activity: 0% Activity: 0%
FF Reputation: 1 andrews red foci Good Standing Member
Buy-Sell-Trade Rating: (0)
Exclamation 2010 Ford Focus SES Idle Fluctuation

Hi, all. I have done some checking on my foci, and cannot figure out what the issue is. I have an idle fluctuation that goes from 600-1000 rpms. When using any electrical it causes it to stumble as well. I have replaced all motor mounts, with motorcraft. Cleaned the maf, cleaned the throttle body, and still has rolling idle issue. Any ideas, or know causes for this? Also no codes come up on scan tool. I am kind of stumped.


andrews red foci is offline  
    Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 11-02-2016, 05:58 AM   #2
Focus Enthusiast
 
road.ripper's Avatar
 
Join Date: Dec 2015
Fan#: 280593
Location: Hamilton, Canada
What I Drive: 2009 Ford Focus SES

Posts: 153
Points 3,186, Level 34
Points: 3,186, Level: 34 Points: 3,186, Level: 34 Points: 3,186, Level: 34
Level Up 91% Completed
Level up: 91% Level up: 91% Level up: 91%
Forum Activity 7%
Activity: 7% Activity: 7% Activity: 7%
FF Reputation: 1 road.ripper Good Standing Member
Buy-Sell-Trade Rating: (0)
charging issues ? low voltage can cause idle stumble. check all ground connections test alt output voltage check battery too ..

vacuum leak ? ( Brake booster vac leak, How does the brake peddle feel ? ) dirty injectors ? when is the last routine maint ? plugs oil & filters ?
road.ripper is offline  
    Reply With Quote Quick reply to this message
Old 11-02-2016, 07:17 PM   #3
Focus Rookie
 
Join Date: Oct 2015
Fan#: 270617
Location: casper, WY
What I Drive: 2010 dark red focus ses

Posts: 21
Points 80, Level 1
Points: 80, Level: 1 Points: 80, Level: 1 Points: 80, Level: 1
Level Up 60% Completed
Level up: 60% Level up: 60% Level up: 60%
Forum Activity 0%
Activity: 0% Activity: 0% Activity: 0%
FF Reputation: 1 andrews red foci Good Standing Member
Buy-Sell-Trade Rating: (0)
This car has always had a squishy pedal, and noticed when I start it cold it's rock hard sometimes. So I can say I feel there is a vacuum leak. As for the idle jumping around when I use power, not sure what to check. I have had battery and alternator checked. They are okay. Anything else? Tpi ? Or some other idle regulating sensor. I had heard of crankshaft position sensor possibly being a problem as well. From what I've read on these cars, a pile of them do this same rolling idle.
andrews red foci is offline  
    Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 11-02-2016, 07:18 PM   #4
Focus Rookie
 
Join Date: Oct 2015
Fan#: 270617
Location: casper, WY
What I Drive: 2010 dark red focus ses

Posts: 21
Points 80, Level 1
Points: 80, Level: 1 Points: 80, Level: 1 Points: 80, Level: 1
Level Up 60% Completed
Level up: 60% Level up: 60% Level up: 60%
Forum Activity 0%
Activity: 0% Activity: 0% Activity: 0%
FF Reputation: 1 andrews red foci Good Standing Member
Buy-Sell-Trade Rating: (0)
I'm going to check all grounding locations to nite as well. I have never checked where the ground cable attaches underneath.
andrews red foci is offline  
    Reply With Quote Quick reply to this message
Old 11-02-2016, 07:21 PM   #5
Focus Rookie
 
Join Date: Oct 2015
Fan#: 270617
Location: casper, WY
What I Drive: 2010 dark red focus ses

Posts: 21
Points 80, Level 1
Points: 80, Level: 1 Points: 80, Level: 1 Points: 80, Level: 1
Level Up 60% Completed
Level up: 60% Level up: 60% Level up: 60%
Forum Activity 0%
Activity: 0% Activity: 0% Activity: 0%
FF Reputation: 1 andrews red foci Good Standing Member
Buy-Sell-Trade Rating: (0)
One more thing I have done a test on the booster and it always checks out fine. When starting and using sometimesoon its rock hard to push, bad check valve or small leak? Trying to put everything I know out there.
andrews red foci is offline  
    Reply With Quote Quick reply to this message
Old 11-03-2016, 08:53 AM   #6
Focus Enthusiast
 
road.ripper's Avatar
 
Join Date: Dec 2015
Fan#: 280593
Location: Hamilton, Canada
What I Drive: 2009 Ford Focus SES

Posts: 153
Points 3,186, Level 34
Points: 3,186, Level: 34 Points: 3,186, Level: 34 Points: 3,186, Level: 34
Level Up 91% Completed
Level up: 91% Level up: 91% Level up: 91%
Forum Activity 7%
Activity: 7% Activity: 7% Activity: 7%
FF Reputation: 1 road.ripper Good Standing Member
Buy-Sell-Trade Rating: (0)
also I forgot about the IAC as a possibility

my brakes are the same almost like they need to be bled. spongy one time then harder the next. I read some where the booster could have an internal vac leak. it 'll bitch to change that. throttle position sensor could be an issue IMO try the cheapest repair first before spending cash

let us know
road.ripper is offline  
    Reply With Quote Quick reply to this message
Old 11-04-2016, 02:29 AM   #7
Focus Enthusiast
 
Join Date: Aug 2016
Fan#: 317729
Location: North, Canada
What I Drive: Silver 2007 SE

Posts: 105
Points 249, Level 4
Points: 249, Level: 4 Points: 249, Level: 4 Points: 249, Level: 4
Level Up 98% Completed
Level up: 98% Level up: 98% Level up: 98%
Forum Activity 0%
Activity: 0% Activity: 0% Activity: 0%
FF Reputation: 3 mp470 Good Standing Member
Buy-Sell-Trade Rating: (0)
I'd check the line going to the brake booster for cracks, leaks etc.

Sent from my A0001 using FF Mobile
road.ripper likes this.
mp470 is offline  
    Reply With Quote Quick reply to this message
Old 11-11-2016, 11:23 PM   #8
Focus Rookie
 
Join Date: Oct 2015
Fan#: 270617
Location: casper, WY
What I Drive: 2010 dark red focus ses

Posts: 21
Points 80, Level 1
Points: 80, Level: 1 Points: 80, Level: 1 Points: 80, Level: 1
Level Up 60% Completed
Level up: 60% Level up: 60% Level up: 60%
Forum Activity 0%
Activity: 0% Activity: 0% Activity: 0%
FF Reputation: 1 andrews red foci Good Standing Member
Buy-Sell-Trade Rating: (0)
Thanks again everyone! I did go through vacuum, had smoke test done. Found vacuum to be in normal range. Checked the booster, seems to be okay as well. As far as the charging system, battery, and alternator check out too. Which still has me stumped, because it has excessive drain when using electronics. I will be replacing the +, - cables just to be safe, they are pretty well corroded. So hopefully that may help. On to the tps. As far as idle control on these cars, is it the tps, and the ecm that controls this? When I do change this part, is there a proper relearning procedure?
andrews red foci is offline  
    Reply With Quote Quick reply to this message
Old 12-22-2016, 03:35 AM   #9
Focus Rookie
 
Join Date: Oct 2015
Fan#: 270617
Location: casper, WY
What I Drive: 2010 dark red focus ses

Posts: 21
Points 80, Level 1
Points: 80, Level: 1 Points: 80, Level: 1 Points: 80, Level: 1
Level Up 60% Completed
Level up: 60% Level up: 60% Level up: 60%
Forum Activity 0%
Activity: 0% Activity: 0% Activity: 0%
FF Reputation: 1 andrews red foci Good Standing Member
Buy-Sell-Trade Rating: (0)
So this car has had a lot checked out. Cannot find any vacuum leaks. Booster checked out okay. Sprayed everywhere with spray to get a shutter. I have cleaned throttle body very well, looks like new. Problem still persists. I ordered tps and will be installing this week. Has anyone ever had a solid fix for the rolling idle. Mine goes from 600's to 800's rpm. Are the computers possibly bad on these cars ? At my wits end here with this car. I love this car, and have not lost hope yet.
andrews red foci is offline  
    Reply With Quote Quick reply to this message
Old 12-22-2016, 10:42 AM   #10
Old Phart
 
sailor's Avatar
 
Join Date: Jun 2008
Fan#: 57268
Location: Lockport, NY
What I Drive: 2013 Black 5-spd SE Hatch

Posts: 44,596
Points 33,746, Level 100
Points: 33,746, Level: 100 Points: 33,746, Level: 100 Points: 33,746, Level: 100
Level Up 0% Completed
Level up: 0% Level up: 0% Level up: 0%
Forum Activity 21%
Activity: 21% Activity: 21% Activity: 21%
FF Reputation: 135 sailor Excellent Standing Member sailor Excellent Standing Member
Buy-Sell-Trade Rating: (0)
The electronic TB may be the issue itself, that's the only control on your version (No IAC like earlier models).

Throttle % would be the item to check even before replacing the TPS, or now before/after since a new one is on the way. You'd want to see it changing to try & adjust RPM as the speed changes.

Test both with and without variable loads, it's supposed to adjust for things like turning on electrical items loading the alternator/engine or turning on A/C.

If it's no longer able to do those small changes consistently that's the expensive issue.
road.ripper likes this.
__________________
"Rubber Side Down"

S.R. #275
Focus Takeover #003 / Tarbo Fan #003
sailor is offline  
    Reply With Quote Quick reply to this message
Reply

Bookmarks & Social Networks

Quick Reply
Message:
Options

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:
What I Drive
Year, color, and model of your car. Example: 2003 Focus Centennial Edition Sedan
Name
Your real name.
City
State
Country
Insurance
Please select your insurance company (Optional)

Log-in


Thread Tools
Display Modes

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
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 05:20 PM.


Copyright 2002-2015 FocusFanatics.com. All Rights Reserved : : 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 Mazda CX-3, Audi S3, Mazda MX-5 Miata and Acura TLX. You can find all Ford Focus, Focus ST and Focus RS related information here. Join our Ford Focus discussion forums and chat with local Focus enthusiasts in your area. If you own other makes have a look at Challenger Hellcat Forum, Charger Hellcat Forum, Cadillac ATS-V Forum, Cadillac CTS-V Forum, Lexus RC-F Forum, Lexus GS-F Forum, Mercedes GLA Forum, Mercedes GLE Forum and Volvo XC90 Forum.




 

Search Engine Optimization by vBSEO 3.6.1