RPM's Bounce with A/C on? - 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    
Ford Focus Tire & Wheels FocusFanatics Merchandise

Reply
 
Thread Tools Display Modes
Old 02-28-2013, 01:16 AM   #1
k2_boarder
Focus Rookie
 
Join Date: Feb 2013
Fan#: 110545
Location: Phoenix, AZ
What I Drive: 2009 Ford Focus SES Coupe

Posts: 8
FF Reputation: 1 k2_boarder Good Standing Member
Buy-Sell-Trade Rating: (0)
RPM's Bounce with A/C on?

So I just bought a used 2009 Ford Focus SES coupe with 72k miles on it and I love it! not a big thing i guess but i noticed that when I turn the A/C on, after awhile the Idle like when i'm at a stoplight it kinda pulses up and down, from normal idle to down a few hundred rpm then back up. Then when i drive it seems fine. Also when i turn the A/C off car idles fine. Anyone have this similar problem or ways to correct this? Thanks


k2_boarder is offline  
    Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 02-28-2013, 01:37 AM   #2
freemind
Vince your Moderator
 
freemind's Avatar
 
Join Date: Jul 2009
Fan#: 67513
Location: Seattle, WA
What I Drive: 2002 ZX3 and a 2010 Focus SE (Work)

Posts: 4,505
Points 6,375, Level 52
Points: 6,375, Level: 52 Points: 6,375, Level: 52 Points: 6,375, Level: 52
Level Up 13% Completed
Level up: 13% Level up: 13% Level up: 13%
Forum Activity 47%
Activity: 47% Activity: 47% Activity: 47%
FF Reputation: 24 freemind Great Standing Member
Buy-Sell-Trade Rating: (23)
Have your battery and alternator tested
__________________
133whp-126ftlbsTQ Eclipse CD8443,Eclipse PA5422, JBL GTO751EZ, PPI 356cs(Rebranded A/D/S 346cs), JBL p1024, SubThump enclosure, RAAmat BXT, Damplifier Pro

Hatch Nation #140
Caeci caecos ducentes
freemind is offline  
    Reply With Quote Quick reply to this message
Old 02-28-2013, 01:40 AM   #3
k2_boarder
Focus Rookie
 
Join Date: Feb 2013
Fan#: 110545
Location: Phoenix, AZ
What I Drive: 2009 Ford Focus SES Coupe

Posts: 8
FF Reputation: 1 k2_boarder Good Standing Member
Buy-Sell-Trade Rating: (0)
okay i'll have to do that. Do you think it could be a problem with my Idle Air Control Valve? I've been trying to research this problem too but some others peoples situations haven't quite matched up with mine haha
k2_boarder is offline  
    Reply With Quote Quick reply to this message
Old 02-28-2013, 01:42 AM   #4
sleepyboy
FF's Night Security
 
sleepyboy's Avatar
 
Join Date: Nov 2004
Fan#: 15335
Location: SW Houston, TX, United States
What I Drive: 01' Yellow ZX3 euro, 04' ZX5 SVT

Posts: 26,383
Points 136,394, Level 100
Points: 136,394, Level: 100 Points: 136,394, Level: 100 Points: 136,394, Level: 100
Level Up 0% Completed
Level up: 0% Level up: 0% Level up: 0%
Forum Activity 44%
Activity: 44% Activity: 44% Activity: 44%
FF Reputation: 48 sleepyboy Great Standing Member
Buy-Sell-Trade Rating: (11)
I'd lean towards the Idle Air Control valve my self. You can take it off and try cleaning it before buying a new one. Sometimes they get gunked up.
__________________
I started out with nothing and I still have most of it left

Hatch Nation #15 (Ole' Yeller') & #150 (The SVT)
Moderator for
Technical Chat
Zetec Performance Chat
Southern Fanatics Chat
sleepyboy is offline  
    Reply With Quote Quick reply to this message
Old 02-28-2013, 01:46 AM   #5
k2_boarder
Focus Rookie
 
Join Date: Feb 2013
Fan#: 110545
Location: Phoenix, AZ
What I Drive: 2009 Ford Focus SES Coupe

Posts: 8
FF Reputation: 1 k2_boarder Good Standing Member
Buy-Sell-Trade Rating: (0)
okay, what do i clean it with?
k2_boarder is offline  
    Reply With Quote Quick reply to this message
Old 02-28-2013, 02:10 AM   #6
sleepyboy
FF's Night Security
 
sleepyboy's Avatar
 
Join Date: Nov 2004
Fan#: 15335
Location: SW Houston, TX, United States
What I Drive: 01' Yellow ZX3 euro, 04' ZX5 SVT

Posts: 26,383
Points 136,394, Level 100
Points: 136,394, Level: 100 Points: 136,394, Level: 100 Points: 136,394, Level: 100
Level Up 0% Completed
Level up: 0% Level up: 0% Level up: 0%
Forum Activity 44%
Activity: 44% Activity: 44% Activity: 44%
FF Reputation: 48 sleepyboy Great Standing Member
Buy-Sell-Trade Rating: (11)
I cleaned mine with Throttle body cleaner I had laying around and some q-tips.
__________________
I started out with nothing and I still have most of it left

Hatch Nation #15 (Ole' Yeller') & #150 (The SVT)
Moderator for
Technical Chat
Zetec Performance Chat
Southern Fanatics Chat
sleepyboy is offline  
    Reply With Quote Quick reply to this message
Old 02-28-2013, 02:11 AM   #7
my_beautious_ZX3
Focus Addict
 
Join Date: Feb 2006
Fan#: 32386
Location: Chicago, IL
What I Drive: 2002 charcoal XZ3

Posts: 746
Points 1,342, Level 20
Points: 1,342, Level: 20 Points: 1,342, Level: 20 Points: 1,342, Level: 20
Level Up 43% Completed
Level up: 43% Level up: 43% Level up: 43%
Forum Activity 0%
Activity: 0% Activity: 0% Activity: 0%
FF Reputation: 5 my_beautious_ZX3 Good Standing Member
Buy-Sell-Trade Rating: (0)
read thru this entire thread:

http://www.focusfanatics.com/forum/showthread.php?t=262990
__________________
"I'm jealous of girls because they get to wear dresses." (Todd Flanders)
my_beautious_ZX3 is offline  
    Reply With Quote Quick reply to this message
Old 02-28-2013, 02:12 AM   #8
sleepyboy
FF's Night Security
 
sleepyboy's Avatar
 
Join Date: Nov 2004
Fan#: 15335
Location: SW Houston, TX, United States
What I Drive: 01' Yellow ZX3 euro, 04' ZX5 SVT

Posts: 26,383
Points 136,394, Level 100
Points: 136,394, Level: 100 Points: 136,394, Level: 100 Points: 136,394, Level: 100
Level Up 0% Completed
Level up: 0% Level up: 0% Level up: 0%
Forum Activity 44%
Activity: 44% Activity: 44% Activity: 44%
FF Reputation: 48 sleepyboy Great Standing Member
Buy-Sell-Trade Rating: (11)
HERE is the how to for cleaning the Zetec one, it'll help you see what you need to do. I know you don't have a Zetec just posting this for the tips it has in it.
__________________
I started out with nothing and I still have most of it left

Hatch Nation #15 (Ole' Yeller') & #150 (The SVT)
Moderator for
Technical Chat
Zetec Performance Chat
Southern Fanatics Chat
sleepyboy is offline  
    Reply With Quote Quick reply to this message
Old 02-28-2013, 02:15 AM   #9
k2_boarder
Focus Rookie
 
Join Date: Feb 2013
Fan#: 110545
Location: Phoenix, AZ
What I Drive: 2009 Ford Focus SES Coupe

Posts: 8
FF Reputation: 1 k2_boarder Good Standing Member
Buy-Sell-Trade Rating: (0)
okay awesome! Thank's guys i'll see what i can do tomorrow and get back to ya.
k2_boarder is offline  
    Reply With Quote Quick reply to this message
Old 02-28-2013, 03:02 AM   #10
sleepyboy
FF's Night Security
 
sleepyboy's Avatar
 
Join Date: Nov 2004
Fan#: 15335
Location: SW Houston, TX, United States
What I Drive: 01' Yellow ZX3 euro, 04' ZX5 SVT

Posts: 26,383
Points 136,394, Level 100
Points: 136,394, Level: 100 Points: 136,394, Level: 100 Points: 136,394, Level: 100
Level Up 0% Completed
Level up: 0% Level up: 0% Level up: 0%
Forum Activity 44%
Activity: 44% Activity: 44% Activity: 44%
FF Reputation: 48 sleepyboy Great Standing Member
Buy-Sell-Trade Rating: (11)
Quote:
Originally Posted by my_beautious_ZX3 View Post


Beat me too it
__________________
I started out with nothing and I still have most of it left

Hatch Nation #15 (Ole' Yeller') & #150 (The SVT)
Moderator for
Technical Chat
Zetec Performance Chat
Southern Fanatics Chat
sleepyboy 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:

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.



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

Forum Jump


All times are GMT -5. The time now is 08:48 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