Tips for programming a rich idle
Thread Starter
Safety Car
Joined: Mar 2005
Posts: 4,723
Likes: 11
From: Winnipeg Manitoba, Canada
Tips for programming a rich idle
Im been messing around with datamaster and tunerpro for a few weeks now. I'm slowly gettin the hang of it but still have problems with a rich idle. My upper RPM's are alot better but it seems that no matter what I do, my low RPM's are still very rich. Once it enters closed loop my BLM's go to 108 at idle. Does anyone have any tips?
Advanced
Joined: Oct 2003
Posts: 77
Likes: 0
From: Cave Creek AZ
You may be having the common problem where the stock program forces "fuel cell 4" during certain conditions of the CCP (charcol canister purge). There is a lot of info on this subject at thirdgen.org. Search on "CCP".
This makes fuel adjustment at idle confusing. Disable this in the constants section:
set the "Forced BLM Idle Cell CCP %D.C. Threshold" to 0
If I remember correctly, my car idles in fuel cell 8 with the cam I have.
This makes fuel adjustment at idle confusing. Disable this in the constants section:
set the "Forced BLM Idle Cell CCP %D.C. Threshold" to 0
If I remember correctly, my car idles in fuel cell 8 with the cam I have.
Thread Starter
Safety Car
Joined: Mar 2005
Posts: 4,723
Likes: 11
From: Winnipeg Manitoba, Canada
You may be having the common problem where the stock program forces "fuel cell 4" during certain conditions of the CCP (charcol canister purge). There is a lot of info on this subject at thirdgen.org. Search on "CCP".
This makes fuel adjustment at idle confusing. Disable this in the constants section:
set the "Forced BLM Idle Cell CCP %D.C. Threshold" to 0
If I remember correctly, my car idles in fuel cell 8 with the cam I have.
This makes fuel adjustment at idle confusing. Disable this in the constants section:
set the "Forced BLM Idle Cell CCP %D.C. Threshold" to 0
If I remember correctly, my car idles in fuel cell 8 with the cam I have.
Last edited by jimmers; Jul 25, 2007 at 12:30 PM.
Thread Starter
Safety Car
Joined: Mar 2005
Posts: 4,723
Likes: 11
From: Winnipeg Manitoba, Canada
I'm using Tunerpro RT and don't see the "Forced BLM Idle Cell CCP %D.C. Threshold" under constants. There is a "Canister Purge Force BLM Idle Cell Duty Cycle though" There is a min. and max. one. My max is set to 0.00 and the minimum is set to 19.92. Do I change the minimum to 0.00 aswell?
Last edited by jimmers; Jul 25, 2007 at 12:34 PM.
Thread Starter
Safety Car
Joined: Mar 2005
Posts: 4,723
Likes: 11
From: Winnipeg Manitoba, Canada
You may be having the common problem where the stock program forces "fuel cell 4" during certain conditions of the CCP (charcol canister purge). There is a lot of info on this subject at thirdgen.org. Search on "CCP".
This makes fuel adjustment at idle confusing. Disable this in the constants section:
set the "Forced BLM Idle Cell CCP %D.C. Threshold" to 0
If I remember correctly, my car idles in fuel cell 8 with the cam I have.
This makes fuel adjustment at idle confusing. Disable this in the constants section:
set the "Forced BLM Idle Cell CCP %D.C. Threshold" to 0
If I remember correctly, my car idles in fuel cell 8 with the cam I have.
Advanced
Joined: Oct 2003
Posts: 77
Likes: 0
From: Cave Creek AZ
That must be it. I use TunerCat. Set the min. to zero also. The stock motor idles normally in cell 4. With your new cam you'll be at a lower vacuum (higher MAP) probably around 60 kPa which is in cell 8. I recommend making it a permanent change.
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Thread Starter
Safety Car
Joined: Mar 2005
Posts: 4,723
Likes: 11
From: Winnipeg Manitoba, Canada
I scaned my car again tonight with the changes and it doesnt seem like anything really changed. The car idles in cell 5 which is still very rich. Any ideas? I also have code 33 now which is MAP Voltage High - Low vacuum.
Last edited by jimmers; Jul 29, 2007 at 07:40 PM.
