Engine, Drivetrain & Forced-Induction Have Technical Questions or Done Modifications to the G35? Find out the answer in here! (View All Posts)

High Idle After Cleaning?!

  #1  
Old 06-29-2008, 11:57 PM
Registered User
Thread Starter
Join Date: Jun 2007
Location: Rutgers
Posts: 93
Likes: 0
Received 0 Likes on 0 Posts
High Idle After Cleaning?!

Hey. i just cleaned my throttle body and maf sensor today.I used the crc brand sprays and now my cars idle is running high even after a reset. any ideas? thanks
 
  #3  
Old 06-30-2008, 01:22 PM
Registered User
iTrader: (33)
Join Date: Nov 2004
Location: OC - So Cal
Posts: 17,181
Received 147 Likes on 105 Posts
 
  #4  
Old 06-30-2008, 06:18 PM
Registered User
Thread Starter
Join Date: Jun 2007
Location: Rutgers
Posts: 93
Likes: 0
Received 0 Likes on 0 Posts
thanks for the instructions.. ill try them tonight and see if it helps. BTW about 10 miles after i cleaned everything i now have a check engine light..
 
  #5  
Old 06-30-2008, 07:55 PM
Registered User
iTrader: (33)
Join Date: Nov 2004
Location: OC - So Cal
Posts: 17,181
Received 147 Likes on 105 Posts
Originally Posted by acside
thanks for the instructions.. ill try them tonight and see if it helps. BTW about 10 miles after i cleaned everything i now have a check engine light..
yep... its the idle... same exact thing happened to me... Thats why I unplug the battery when I mess with the TB now - and be real careful not to mess with the plate...

If you do the procedure I posted and a full ECU reset it should be fine... you'll need to find someone with consult 2 to clear the CEL...
 
  #6  
Old 06-30-2008, 09:27 PM
Registered User
Thread Starter
Join Date: Jun 2007
Location: Rutgers
Posts: 93
Likes: 0
Received 0 Likes on 0 Posts
thanks for the input. i tried the procedure posted but it doesnt seem to helped. my idle went down about 100rpm now in the 900 range and my car seems to feel a little odd. at idle it feels like the engine is "jumping" ??
 
  #7  
Old 06-30-2008, 09:32 PM
Registered User
iTrader: (33)
Join Date: Nov 2004
Location: OC - So Cal
Posts: 17,181
Received 147 Likes on 105 Posts
did you do an ECU reset too?... disconnect battery, turn on ignition, pump the brakes several times (to drain the capacitors)... doing both worked for me... I had to try a couple of times though because the timing needs to be perfect.

When it works, the idle will come down to about 600-700... clear the code though or dealer will see it if/when they plug in to do future diagnosis and you donít want to hassle with explanations...
 
  #8  
Old 07-02-2008, 07:52 PM
Registered User
Thread Starter
Join Date: Jun 2007
Location: Rutgers
Posts: 93
Likes: 0
Received 0 Likes on 0 Posts
i just finished the procedure and also reset the car.. still same high idle problem and i keep throwing a cel. the code i get is P0507. Thanks
 
  #9  
Old 07-02-2008, 09:54 PM
bull3t's Avatar
Registered User
iTrader: (8)
Join Date: May 2006
Location: LOS ANGELES
Posts: 1,940
Likes: 0
Received 0 Likes on 0 Posts
get it reset at the dealership. that's what i did, i had the same problem. next time don't mess with the butterfly when cleaning it.
 
  #10  
Old 07-02-2008, 10:42 PM
Registered User
iTrader: (33)
Join Date: Nov 2004
Location: OC - So Cal
Posts: 17,181
Received 147 Likes on 105 Posts
Originally Posted by acside
i just finished the procedure and also reset the car.. still same high idle problem and i keep throwing a cel. the code i get is P0507. Thanks
hmmm... sorry it didnt work I guess if there is no vacuum leak and the reset didnít work - dealer service is the other option... hope you donít have to buy a new TB... good luck
 
  #11  
Old 07-03-2008, 03:25 AM
E_K
E_K is offline
Registered User
iTrader: (15)
Join Date: Aug 2003
Location: Toh-rensa,Ahteesia,Ahcadia,Montree Pak, Longa Beacha
Posts: 1,846
Received 9 Likes on 6 Posts
I had that code before. Needed a new throttle body. These throttle bodies can go bad just from messing with the plate.
 
  #12  
Old 07-07-2008, 03:31 AM
Hydrazine's Avatar
Former G35driver Vendor
iTrader: (23)
Join Date: Jul 2004
Location: Los Angeles California
Posts: 3,054
Received 84 Likes on 53 Posts
P0507 = Idle Speed Control System

If you know you did the reset procedure correctly, its time to bring it to the dealer.

Always avoid pushing on the throttle body butterfly valve. Bad stuff can happen.

E K (Albert) can tell you all about what can happen.
 
  #13  
Old 07-07-2008, 07:58 AM
Registered User
iTrader: (2)
Join Date: Jan 2007
Location: Baltimore, MD
Posts: 1,999
Received 17 Likes on 17 Posts
I don't understand how some have problems when cleaning the throttle body.

I've disconnected the harness, I've opened & closed the flap to get in between the nooks and crannies several times, It still doesn't throw any codes or any idle problems. I've known several others that had no problems either when cleaning the TB the way i did.

My best guess is... disconnecting the battery before working on it has something to do with it. I honestly can't remember if i did or not though.

OR....maybe non rev-up and rev-up models have different reactions when cleaning the throttle body?
 
  #14  
Old 07-07-2008, 08:33 AM
Hydrazine's Avatar
Former G35driver Vendor
iTrader: (23)
Join Date: Jul 2004
Location: Los Angeles California
Posts: 3,054
Received 84 Likes on 53 Posts
And always disconnect the batter before doing anything with the TB.

Try the reset proceure again.

Its tricky to do. You have to get the timing just right for it to work.
 

Thread Tools
Search this Thread
Rate This Thread
Rate This Thread:
You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: High Idle After Cleaning?!


Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: