Big cam = no ASR?
07-26-2007, 01:57 PM
#22
TECH Fanatic
iTrader: (12)
Join Date: Oct 2006
Location: Orlando, FL
Posts: 1,724
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Bad30th
I foudn the answer to this a while back -
You need to change the values for P0121 code MAP window.
Larger cams produce less vacuum at idle (and consequently higher MAP values).
The computer does a speed density verification (which uses MAP values) against what the MAF (among other things) is reading and tries to make sure eveything jives. When the MAP value is skewed it will cause the ASR/TCS problem as well as issues/codes for the throttle position sensor (P0121).
The fix is in changing the MAP values/window in the P0121 code. Do a search for P0121 in the tuning section for more info.
Bad30th
You need to change the values for P0121 code MAP window.
Larger cams produce less vacuum at idle (and consequently higher MAP values).
The computer does a speed density verification (which uses MAP values) against what the MAF (among other things) is reading and tries to make sure eveything jives. When the MAP value is skewed it will cause the ASR/TCS problem as well as issues/codes for the throttle position sensor (P0121).
The fix is in changing the MAP values/window in the P0121 code. Do a search for P0121 in the tuning section for more info.
Bad30th
What if I only get the "ASR off" light when I turn my A/C on?
Thanks.
07-27-2007, 07:30 PM
#25
11 Second Club
Thread Starter
iTrader: (27)
Join Date: May 2002
Location: East Palestine, OH - USA
Posts: 2,397
Likes: 0
Received 0 Likes
on
0 Posts
Hold old thread batman!
I don't have any issues when I use my AC but I made quite a few changes to get rid of the MAP error.
Try these:
I don't have any issues when I use my AC but I made quite a few changes to get rid of the MAP error.
Try these:
Originally Posted by Bad30th
07-30-2007, 12:45 PM
#26
TECH Fanatic
iTrader: (12)
Join Date: Oct 2006
Location: Orlando, FL
Posts: 1,724
Likes: 0
Received 0 Likes
on
0 Posts
Its not the MAP sensor. There is no SES light.
I only get the "ASR off" light when I turn the A/C on.
If the turn the A/C off and restart the car there is no ASR light.
I only get the "ASR off" light when I turn the A/C on.
If the turn the A/C off and restart the car there is no ASR light.
07-31-2007, 04:07 PM
#27
11 Second Club
Thread Starter
iTrader: (27)
Join Date: May 2002
Location: East Palestine, OH - USA
Posts: 2,397
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by TheLS1Kid
Its not the MAP sensor. There is no SES light.
I only get the "ASR off" light when I turn the A/C on.
If the turn the A/C off and restart the car there is no ASR light.
I only get the "ASR off" light when I turn the A/C on.
If the turn the A/C off and restart the car there is no ASR light.
