2004 Sonata Fast Idle Problem - Hyundai Forums : Hyundai Forum
 
LinkBack Thread Tools
#1 Old 07-22-2011, 01:00 AM
Junior Member
 
Join Date: Jan 2010
Posts: 1
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
srsrsi
(Thread Starter)
I have a 2004 Sonata with a 2.4L engine. I recently changed the timing belt as preventive maintenance and am now having an issue a sustained fast idle that will not go below 1200rpm. Occassionally an error code P0507 (fast idle code will pop up on the OBD-II code reader following code reset and two fully warmed up drive cycles) but not always. The P0507 code and fast idle problem did not exist to the timing belt change.

I checked the timing marks for the Crankshaft, the two overhead camshafts, the balance shaft and the oil pump shaft and they are all dead on following the appropriate number of revolutions of the crankshaft index mark. I even took before and after photos and the positions are identical. I also confirmed that the tooth count and length of the timing belt was identical prior to installation.

I checked for vacuum leaks and found none. Vaccum holds steady at about 21 Hg on my vacuum guage. PCV valve and hose are functioning and leak free. I even had my mechanic do a vacuum smoke test and it also showed no vacuum leaks. He also checked that there was no air trapped in the cooling system where the temperature sensor is located and also ran ECM diagnostics. He found the Idle Control Motor at 20% during warm idle and that the LTFT will be in the negative during road testing (-3 to -11% and varying). That said there is no code indicating that the Idle Contol Motor (valve) is faulty.

Any thoughts?


srsrsi is offline  
Sponsored Links
Advertisement
 
#2 Old 07-22-2011, 06:59 AM
Senior Member
 
sbr711's Avatar
 
Join Date: Apr 2010
Location: hiding from those who might be looking for me
I dont own Hyundai car, I drive everybody else Hyundai during day
Posts: 8,851
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 61 Post(s)
sbr711 is an unknown quantity at this point
When you replaced timing belt, you did not unbolt the cruise module, so you pulled the jacket out of the threaded nut, thus putting excess tension on the cable and hold throttle open.

You will have to razor blade the plastic jacket off so cable will sit beck in the threaded adjuster thing to allow throttle to close.

0507 code is result of the goof up.

<--- please fill in the 'location' and 'what you drive' boxes on your personal profile page.
This information makes it much easier for other members to answer/comment on your posts.
sbr711 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hyundai Forums : Hyundai 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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



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

 
For the best viewing experience please update your browser to Google Chrome