PCM Diagnostics & Tuning HP Tuners | Holley | Diablo
Sponsored by:
Sponsored by:

Startup Friction Airflow Correction table?

Thread Tools
 
Search this Thread
 
Old 10-31-2005, 11:24 AM
  #1  
Moderator
Thread Starter
iTrader: (4)
 
JNorris's Avatar
 
Join Date: Nov 2001
Location: Montgomery, AL
Posts: 2,074
Likes: 0
Received 0 Likes on 0 Posts

Default Startup Friction Airflow Correction table?

Below is on a 98Z28 A4 using EFILive

Today I played with this table in an effort to correct a warm starting problem and it seemed to work okay. But…
The problem is that when you transition from park to drive or drive to park it seems that the values in {B4343} Startup Friction Airflow Correction table are also added to the {B4703} Desired Airflow table and the IAC counts jump up and as expected the idle increases.
I thought that the values in {B4343} were only applied at startup and for a very short time afterwards as controlled in the {B4344} Startup Friction Airflow Decay and {B4345} Startup Friction Airflow Delay tables.


Does anyone have any experience with the idle start-up tables?

Thanks

John
Old 12-12-2005, 03:59 PM
  #2  
Moderator
Thread Starter
iTrader: (4)
 
JNorris's Avatar
 
Join Date: Nov 2001
Location: Montgomery, AL
Posts: 2,074
Likes: 0
Received 0 Likes on 0 Posts

Default

Any feedback on this?

John
Old 12-12-2005, 04:31 PM
  #3  
TECH Addict
 
technical's Avatar
 
Join Date: Mar 2004
Location: Fat Chance Hotel
Posts: 2,336
Likes: 0
Received 0 Likes on 0 Posts

Default

What is your startup issue?
Old 12-12-2005, 06:12 PM
  #4  
Moderator
Thread Starter
iTrader: (4)
 
JNorris's Avatar
 
Join Date: Nov 2001
Location: Montgomery, AL
Posts: 2,074
Likes: 0
Received 0 Likes on 0 Posts

Default

I am trying to get a little but more air through the IAC on startups without adding it to the running airflow table.
Old 12-12-2005, 09:48 PM
  #5  
TECH Addict
 
technical's Avatar
 
Join Date: Mar 2004
Location: Fat Chance Hotel
Posts: 2,336
Likes: 0
Received 0 Likes on 0 Posts

Default

Right, but what are you trying to fix? Maybe that's not the best solution.
Old 12-13-2005, 07:59 AM
  #6  
Moderator
Thread Starter
iTrader: (4)
 
JNorris's Avatar
 
Join Date: Nov 2001
Location: Montgomery, AL
Posts: 2,074
Likes: 0
Received 0 Likes on 0 Posts

Default

If I set the running airflow (desired airflow) table to a value that is high enough for car to start and run it ends up being too high and when I go to park/neutral from gear the engine races.


John
Old 12-13-2005, 08:13 AM
  #7  
TECH Senior Member
iTrader: (7)
 
Ragtop 99's Avatar
 
Join Date: Nov 2001
Location: Bethesda, MD
Posts: 9,491
Likes: 0
Received 1 Like on 1 Post

Default

John, after porting your TB did you redo your IAC effective area table?




All times are GMT -5. The time now is 06:42 AM.