Computer Diagnostics and Tuning Technical discussion on diagnostics and programming of the F-body computers

How to Fix Stall Wall?

Thread Tools
 
Search this Thread
 
Old Dec 18, 2006 | 12:55 PM
  #1  
87bandit's Avatar
Thread Starter
Registered User
 
Joined: Oct 2005
Posts: 660
From: Palm Harbor, FL
How to Fix Stall Wall?

I'm running into the stall wall issue with my car, just what exactly I had to do to fix the stuff as far as tuning goes?

I do a burnout in my car on the street or at the track and then try to launch it the car will refuse to shift into 2nd until I let off. I will let off and resume throttle but then the transmission will lock out either 1st or 2nd gear until I turn off the car and wait a min then everything will work perfect again.

it never did this until I put in the convertor, and was there on my original trans build and still here with the new one, so I'm pretty sure it's stall wall.

Last edited by 87bandit; Dec 18, 2006 at 01:03 PM.
Old Dec 22, 2006 | 11:12 PM
  #2  
VinceTrifecta's Avatar
Registered User
 
Joined: Oct 2006
Posts: 477
From: Seattle area
I have been told that OBD2 PCMs do not have this problem, but I haven't verified it, because my car doesn't have a high enough stall converter ;-). If that is true, you could convert your car to use an OBD2 PCM to get rid of this problem. Send me a PM and I can get you in contact with the guy that told me about it.
Old Dec 24, 2006 | 05:37 AM
  #3  
MichiganSkip's Avatar
Registered User
 
Joined: Jul 2000
Posts: 993
From: Three Oaks MI
Do you have the latest version of TC for OBD1? That is the place to start. If you do a search you will find a ton of discussion on the subject. Most will in a round about way point you in the direction you need to go. I believe that I've even given out the "secret" once or twice. If you still need help PM me.
Old Dec 26, 2006 | 04:33 PM
  #4  
jakesz28's Avatar
Registered User
 
Joined: Nov 2006
Posts: 393
From: Camanche IA
I am not a pro tuner. But I beleave the constant table "Vss Diagnostic Enable Min RPM" should be set to exceed the RPM that your stall engages.
Old Dec 26, 2006 | 08:34 PM
  #5  
MichiganSkip's Avatar
Registered User
 
Joined: Jul 2000
Posts: 993
From: Three Oaks MI
Originally Posted by jakesz28
I am not a pro tuner. But I beleave the constant table "Vss Diagnostic Enable Min RPM" should be set to exceed the RPM that your stall engages.
I think you're right!
Old Dec 26, 2006 | 08:53 PM
  #6  
2xLS1's Avatar
Registered User
 
Joined: Jun 2003
Posts: 208
From: Warr Acres, OK
Originally Posted by s_willis
Do you have the latest version of TC for OBD1? That is the place to start. If you do a search you will find a ton of discussion on the subject. Most will in a round about way point you in the direction you need to go. I believe that I've even given out the "secret" once or twice. If you still need help PM me.
I've never understood why the fix for this is considered such a secret. Care to explain why?
Old Dec 27, 2006 | 01:50 PM
  #7  
MichiganSkip's Avatar
Registered User
 
Joined: Jul 2000
Posts: 993
From: Three Oaks MI
Originally Posted by 2xLS1
I've never understood why the fix for this is considered such a secret. Care to explain why?
Look two posts above yours. It's not a secret anymore Actually I don't know why it's considered "taboo" to tell people to go into the constant table "VSS Diagnostic Enable Min RPM" and set it higher than the converter RPM. I asked about 6 months ago and got someone mad at me for asking. I was told that there is enough info out for me to figure it out.
So now everyone who needs to know will know now.
Old Dec 27, 2006 | 06:12 PM
  #8  
jakesz28's Avatar
Registered User
 
Joined: Nov 2006
Posts: 393
From: Camanche IA
I found that info I beleave on a different site a month or two ago. Hopefully it helps a few people out.
Old Dec 29, 2006 | 12:59 PM
  #9  
EkS's Avatar
EkS
Registered User
 
Joined: Jan 2006
Posts: 214
From: S. Cali
What does your TC stall at?
Old Jan 23, 2007 | 09:53 AM
  #10  
OneFlyn95z28's Avatar
Registered User
 
Joined: Dec 1969
Posts: 1,431
From: Pacific North West
BTW it still does not always work
Old Feb 4, 2007 | 03:40 PM
  #11  
MichiganSkip's Avatar
Registered User
 
Joined: Jul 2000
Posts: 993
From: Three Oaks MI
Originally Posted by OneFlyn95z28
BTW it still does not always work
Ellis, that's the only one that would work on mine. I guess for him, it's worth a try.
Old Feb 5, 2007 | 07:24 AM
  #12  
aifilaw's Avatar
Registered User
 
Joined: Aug 2006
Posts: 199
From: Longview, TX
I had this problem as well because on the cold and hot modes for my kickdown(WOT) tables were set to shift at an unreasonably high speed/RPM from 1->2.
Might check that as well.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
lildemars09
LT1 Based Engine Tech
22
May 28, 2015 07:54 PM
beltrunner
Fuel and Ignition
6
May 17, 2015 10:18 PM
edxiel
LT1 Based Engine Tech
10
Jan 24, 2015 07:40 PM
supercharged94Z28
LT1 Based Engine Tech
12
Feb 24, 2003 10:22 PM
MislMan
Drag Racing Technique
1
Jul 19, 2002 11:41 AM




All times are GMT -5. The time now is 08:21 AM.