Any reason I need to idle in cell 4?
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Any reason I need to idle in cell 4?
Just as post says, I remember seeing that it was a special cell...
But for me to best utilize cells I will idle in cell 8 or even better 12..
Any reason to not do that?
But for me to best utilize cells I will idle in cell 8 or even better 12..
Any reason to not do that?
Last edited by 87_TA; 03-18-2004 at 06:57 PM.
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Car: 2005 Subaru STI
Engine: 153ci of Turbo Power!
Transmission: 6-Speed
I've been idling in cell 12 for a long time. It's great. Recently I actually CHANGED the code to reflect that the idle cell is cell 12 and not cell 4. Very nice.
Tim
Tim
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im not sure what the big hub bub is about cells for block learns. other then correction facotrs and blm and int update times as well as some o2 pid controll changes and minor ones at that.
just run openloop your engien wil thank you.
just run openloop your engien wil thank you.
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My car would "stick" in cell 4. Also would just switch to cell 4 while driving. Kind of like a faulty manual trans that keeps popping out of gear while driving........ So I now idle in a different cell. No more sticking cell 4. Bet it had to do with my cam.
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im not sure what the big hub bub is about cells for block learns. other then correction facotrs and blm and int update times as well as some o2 pid controll changes and minor ones at that.
just run openloop your engien wil thank you.
just run openloop your engien wil thank you.
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Originally posted by TRAXION
I've been idling in cell 12 for a long time. It's great. Recently I actually CHANGED the code to reflect that the idle cell is cell 12 and not cell 4. Very nice.
Tim
I've been idling in cell 12 for a long time. It's great. Recently I actually CHANGED the code to reflect that the idle cell is cell 12 and not cell 4. Very nice.
Tim
Trax what is a benefit of changing code to reflect idle as cell 12?
im not sure what the big hub bub is about cells for block learns. other then correction facotrs and blm and int update times as well as some o2 pid controll changes and minor ones at that.
But I have been there and done that with my last cam because I had to. I like closed loop better, I guess because you are not running so blind all of the time.
I think it would be much easier if VE showed PW instead of VE, Then again it would be called PW table if it did.
Though I may be going back to being that my Crankcase evacuators play havoc on the o2 sometimes.
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Car: 2005 Subaru STI
Engine: 153ci of Turbo Power!
Transmission: 6-Speed
Originally posted by 87_TA
Thanks Guys,
Trax what is a benefit of changing code to reflect idle as cell 12?
Thanks Guys,
Trax what is a benefit of changing code to reflect idle as cell 12?
Quick Tip:
Make your max idle in the idle RPM table the low BLM boundary in the BLM boundary table that way you will be in Cell 12 even on a cold start.
Tim
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Make your max idle in the idle RPM table the low BLM boundary in the BLM boundary table that way you will be in Cell 12 even on a cold start.
Like I said, I HAD to change my idle cell. The cam (or whatever) would make cell 4 active way too much. It didn't matter on the idle constants (like max mph for idle). I changed every one and it still "stuck". That's why I idle in a different cell
Last edited by 11sORbust; 03-19-2004 at 08:37 AM.
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Car: 2005 Subaru STI
Engine: 153ci of Turbo Power!
Transmission: 6-Speed
Originally posted by 11sORbust
YEP! that can make a big diff when engine is cold
Like I said, I HAD to change my idle cell. The cam (or whatever) would make cell 4 active way too much. It didn't matter on the idle constants (like max mph for idle). I changed every one and it still "stuck". That's why I idle in a different cell
YEP! that can make a big diff when engine is cold
Like I said, I HAD to change my idle cell. The cam (or whatever) would make cell 4 active way too much. It didn't matter on the idle constants (like max mph for idle). I changed every one and it still "stuck". That's why I idle in a different cell
I no longer have a 'forced' idle cell and now my idle cell does agree with the cell in which the car really idles.
Tim
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I was able to keep the code set for idle cell 4 and NEVER touch cell 4. Ever. I did this by simply doing what I have been telling everyone else about; namely, the force idle cell with regard to CCP. This will stop a forced idle cell. It sounds like your setup still has the forced idle cell ... but now it is being forced to the cell of your choice.
My question is why did MY car require that constant to be zero'd out? I have two ideas and none of em is the cam......
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Car: 2005 Subaru STI
Engine: 153ci of Turbo Power!
Transmission: 6-Speed
Originally posted by 11sORbust
Ok one guess is that the CCP has an outut going to ecm? When I removed CCP, the ecm wasn't getting a signal?
Ok one guess is that the CCP has an outut going to ecm? When I removed CCP, the ecm wasn't getting a signal?
ALL of our cars $8D require the CCP DC threshold to be zeroed out in order to stop a forced idle block learn cell. Again - I pointed this out a long long time ago. The CCP has no output going to the ECM. All the logic is internal. The ECM knows the CCP DC because it is commanding that DC. This is the same value that is pushed to the ALDL stream. The code has a logic statement that says ...
IF the CCP DC is less than XX% then force the idle cell.
When you set the CCP DC threshold to 0% then the forced idle cell will never occur because you can never be less than 0%. You and I have covered this before.
Tim
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We never covered why my car does this. I have several ideas. But no real answer WHY I had to set that constant to 0%. Before the intake,cam,ccp delete my blms worked fine. The ccp didn't make anything hang up before (or on other cars). Know what I mean?????
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Car: 2005 Subaru STI
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I think I might be confused because I don't understand why you are confused. I apologize if I'm being too brief on this subject (it's just been beaten to death).
The $8D code specifically forces the idle Block Learn cell (stock is 4) ANYTIME that the commanded CCP Duty Cycle is less than the specified constant. This does not happen for just your car. It happens for every single one of us running the $8D code. Normally this is never a problem. However, when the MAP and RPM indicate that you should be in block learn cell 12 and you are in 4 it gets really screwy. Thus, by changing the CCP DC threshold you can remove this forced idle cell condition. I already stated why you had to set it to 0% ...
You said that the CCP "didn't make anything hang up before (or on other cars)". I beg to differ. It won't lock up the BLMs ... it forces a block learn cell of 4 (unless you've changed it). Please review the following ...
Tim
The $8D code specifically forces the idle Block Learn cell (stock is 4) ANYTIME that the commanded CCP Duty Cycle is less than the specified constant. This does not happen for just your car. It happens for every single one of us running the $8D code. Normally this is never a problem. However, when the MAP and RPM indicate that you should be in block learn cell 12 and you are in 4 it gets really screwy. Thus, by changing the CCP DC threshold you can remove this forced idle cell condition. I already stated why you had to set it to 0% ...
When you set the CCP DC threshold to 0% then the forced idle cell will never occur because you can never be less than 0%.
Tim
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I understand. BUT my car would stay in cell 4 up to 25+mph from a stop. Befor the cam,etc it didn't do that. Also on deaccel it would pop nto cell 4, it didn't before. There is a couple of other spots cell 4 "stuck". I checked my friends car and everything works fine, just like mine did before. So something happened. Not sure why.......
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