Page 1 of 3 123 LastLast
Results 1 to 10 of 28

Thread: Idle after 30 minutes goes rich

  1. #1
    Member
    Join Date
    Oct 2005
    Posts
    83

    Default Idle after 30 minutes goes rich

    Can someone take a look at my tune. I start out with a nice 14.6 idle then after 20-30 min it goes rich to about 12.5. Water and air temps have not changed also

    I am in open loop and it doesnt look like any stft or ltft are active at all. I am thinking I may have missed a setting somewhere but cant locate it.

    One other question I have is when adding from logging file to main ve should I be smoothing the whole table every time I see a peak or just the peak surrounding area?

    Thanks

    Louis
    Attached Files Attached Files
    Last edited by louis; November 9th, 2007 at 06:21 AM.

  2. #2
    Lifetime Member Chalky's Avatar
    Join Date
    Sep 2003
    Posts
    617

    Default

    Regarding VE table, I assume you are doing AutoVE. Once you start getting the table close, just work on spikes. If you have a good cell count in surrounding cells and a spike in the middle, you can assume the spike needs to be smoothed in. If I can get cell counts of a minimum of 25 and preferably 50, then those values become very reliable and I try not to change those cells that much.

    My guess is someone will jump in and review your tun. if not, I will take a look tomorrow when I get to my other computer.
    2015 Z06 A8

  3. #3
    Lifetime Member mr.prick's Avatar
    Join Date
    Nov 2006
    Posts
    3,195

    Default

    change your PE AFR table {B3618}.
    14.63 is a no no.
    also leave your commanded AFR stock,{B3647} in your case.
    probably why you have so many dips in your spark table.(i guess you subtracted knock)
    also your fan come on too soon,
    in OL, STFT and LTFT are off.
    Last edited by mr.prick; November 17th, 2007 at 04:53 AM.

  4. #4
    Member
    Join Date
    Oct 2005
    Posts
    83

    Default I am running autove

    Sorry if I didnt mention it but in the tutorial I followed this.

    6. Open calibration {B3618} “PE Modifier Based on RPM” Select all cells by clicking in the extreme top-left, grey cell. If the calibration is displayed as EQ Ratio then enter 1.0 into the Adjust text box and click the [#] button to set all values to 1.0 EQ Ratio. If the calibration is displayed as AFR then enter 14.63 into the Adjust text box and click the [#] button to set all values to 14.63 AFR.

    So B3618 is 14.63 yes in open loop tuning with autove. Am I missing something here because I thought in open loop this had to be 14.63?

    Thanks for the reply

    Louis

  5. #5
    Lifetime Member Chalky's Avatar
    Join Date
    Sep 2003
    Posts
    617

    Smile

    You are using same tutorial as everyone. By setting PE to 14.63, you are using the CFOL table to control AFR throughout the range. should be fine as long as your CFOL table is setup per the tutorial.

    In the 80-100 C temp range, your afr's should trend from 14.63 to 12.99 or so, maybe 12.95.
    2015 Z06 A8

  6. #6
    Senior Member
    Join Date
    Dec 2004
    Posts
    124

    Default

    What's PE got to do with idle?

  7. #7
    Lifetime Member Chalky's Avatar
    Join Date
    Sep 2003
    Posts
    617

    Default

    Quote Originally Posted by SSbaby
    What's PE got to do with idle?
    Refer to post #3, #4 and #5
    2015 Z06 A8

  8. #8
    Lifetime Member Chalky's Avatar
    Join Date
    Sep 2003
    Posts
    617

    Default

    Can you pist a log file showing the car going rich? Your tun files looks fine for AutoVE from what I see.

    Are you stock, cam, headers, any mods?
    2015 Z06 A8

  9. #9
    Lifetime Member mr.prick's Avatar
    Join Date
    Nov 2006
    Posts
    3,195

    Default

    Quote Originally Posted by SSbaby
    What's PE got to do with idle?
    nothing.
    but when you are at 4000 RPM and are in the low end of the
    kPa range it can be harmful

  10. #10
    Senior Member
    Join Date
    Dec 2004
    Posts
    124

    Default

    Quote Originally Posted by mr.prick
    nothing.
    but when you are at 4000 RPM and are in the low end of the
    kPa range it can be harmful
    How so? His engine is operating on the Open Loop table?

Page 1 of 3 123 LastLast

Similar Threads

  1. help! rich at idle
    By drdarthinvader in forum Custom Operating Systems
    Replies: 3
    Last Post: December 13th, 2008, 06:00 PM
  2. New cam - rich idle??
    By Tomcat in forum Gen III V8 Specific
    Replies: 18
    Last Post: May 13th, 2008, 07:38 AM
  3. Rich Idle - Please Help!
    By white01ss in forum General (Petrol, Gas, Ethanol)
    Replies: 36
    Last Post: April 30th, 2008, 04:09 AM
  4. Car Wont Idle And Runs Rich At Idle ( Tune Inside)
    By mikeyayell in forum Gen III V8 Specific
    Replies: 13
    Last Post: January 8th, 2008, 03:17 PM
  5. Idle is rich
    By zapp168 in forum Gen III V8 Specific
    Replies: 0
    Last Post: August 14th, 2007, 09:29 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •