MAF recalibration, PE enabled?
MAF recalibration, PE enabled? After tuning the VE table, it's time to recalibrate my MAF.
But, does PE influence dynamic airlflow?
The reason I ask is that you recalibrate your MAF based on dynamic airflow.
Then, when you're done recalibrating, you change PE.
If it does influence dynamice airflow, then how would you calibrate the MAF at WOT (the time the MAF is used most)?
But, does PE influence dynamic airlflow?
The reason I ask is that you recalibrate your MAF based on dynamic airflow.
Then, when you're done recalibrating, you change PE.
If it does influence dynamice airflow, then how would you calibrate the MAF at WOT (the time the MAF is used most)?
for the last time:
MAF AND PE DON'T HAVE ANYTHING TO DO WITH EACH OTHER!
they're indpendent and orthogonal variables, so all such questions are moot.
what scares me is that asking such questions shows you don't understand the process, yet you're making changes to the computer, which is dangerous.
another good thing to point out, is that you should not disable PE UNLESS you have it compensated for in OLFA AND _verfied_ that it will be stuck in Open Loop permanently.
I had a case where a guy bravely set PE to 1.0, but didn't lock it in Open Loop, so he got WOT, but he was in Closed Loop, so he never went below stoich at WOT! so verify that you're in Open Loop, before you got WOTing.
MAF AND PE DON'T HAVE ANYTHING TO DO WITH EACH OTHER!
they're indpendent and orthogonal variables, so all such questions are moot.
what scares me is that asking such questions shows you don't understand the process, yet you're making changes to the computer, which is dangerous.
another good thing to point out, is that you should not disable PE UNLESS you have it compensated for in OLFA AND _verfied_ that it will be stuck in Open Loop permanently.
I had a case where a guy bravely set PE to 1.0, but didn't lock it in Open Loop, so he got WOT, but he was in Closed Loop, so he never went below stoich at WOT! so verify that you're in Open Loop, before you got WOTing.
Originally Posted by RedHardSupra
for the last time:
MAF AND PE DON'T HAVE ANYTHING TO DO WITH EACH OTHER!
they're indpendent and orthogonal variables, so all such questions are moot.
what scares me is that asking such questions shows you don't understand the process, yet you're making changes to the computer, which is dangerous.
another good thing to point out, is that you should not disable PE UNLESS you have it compensated for in OLFA AND _verfied_ that it will be stuck in Open Loop permanently.
I had a case where a guy bravely set PE to 1.0, but didn't lock it in Open Loop, so he got WOT, but he was in Closed Loop, so he never went below stoich at WOT! so verify that you're in Open Loop, before you got WOTing.
MAF AND PE DON'T HAVE ANYTHING TO DO WITH EACH OTHER!
they're indpendent and orthogonal variables, so all such questions are moot.
what scares me is that asking such questions shows you don't understand the process, yet you're making changes to the computer, which is dangerous.
another good thing to point out, is that you should not disable PE UNLESS you have it compensated for in OLFA AND _verfied_ that it will be stuck in Open Loop permanently.
I had a case where a guy bravely set PE to 1.0, but didn't lock it in Open Loop, so he got WOT, but he was in Closed Loop, so he never went below stoich at WOT! so verify that you're in Open Loop, before you got WOTing.
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Originally Posted by RedHardSupra
for the last time:
MAF AND PE DON'T HAVE ANYTHING TO DO WITH EACH OTHER!
they're indpendent and orthogonal variables, so all such questions are moot.
what scares me is that asking such questions shows you don't understand the process, yet you're making changes to the computer, which is dangerous.
another good thing to point out, is that you should not disable PE UNLESS you have it compensated for in OLFA AND _verfied_ that it will be stuck in Open Loop permanently.
I had a case where a guy bravely set PE to 1.0, but didn't lock it in Open Loop, so he got WOT, but he was in Closed Loop, so he never went below stoich at WOT! so verify that you're in Open Loop, before you got WOTing.
MAF AND PE DON'T HAVE ANYTHING TO DO WITH EACH OTHER!
they're indpendent and orthogonal variables, so all such questions are moot.
what scares me is that asking such questions shows you don't understand the process, yet you're making changes to the computer, which is dangerous.
another good thing to point out, is that you should not disable PE UNLESS you have it compensated for in OLFA AND _verfied_ that it will be stuck in Open Loop permanently.
I had a case where a guy bravely set PE to 1.0, but didn't lock it in Open Loop, so he got WOT, but he was in Closed Loop, so he never went below stoich at WOT! so verify that you're in Open Loop, before you got WOTing.
Obviously, it doens't work when PE is in effect since the fuel trims zero out.
I'm not using this method. Just checking it out.
And no, I don't completely understand how everything works together. That's why I'm asking questions.
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Verdad Gallardo And, it's not like they have "nothing" to do with each other.
I'm tuning MAF based on my VE table. I'm tuning my VE table based on fuel trims.
PE affects fuel trims. I just wanted to make sure it didn't affect dynamic airflow.
I'm tuning MAF based on my VE table. I'm tuning my VE table based on fuel trims.
PE affects fuel trims. I just wanted to make sure it didn't affect dynamic airflow.
Originally Posted by RedHardSupra
for the last time:
MAF AND PE DON'T HAVE ANYTHING TO DO WITH EACH OTHER!
they're indpendent and orthogonal variables, so all such questions are moot.
what scares me is that asking such questions shows you don't understand the process, yet you're making changes to the computer, which is dangerous.
another good thing to point out, is that you should not disable PE UNLESS you have it compensated for in OLFA AND _verfied_ that it will be stuck in Open Loop permanently.
I had a case where a guy bravely set PE to 1.0, but didn't lock it in Open Loop, so he got WOT, but he was in Closed Loop, so he never went below stoich at WOT! so verify that you're in Open Loop, before you got WOTing.
MAF AND PE DON'T HAVE ANYTHING TO DO WITH EACH OTHER!
they're indpendent and orthogonal variables, so all such questions are moot.
what scares me is that asking such questions shows you don't understand the process, yet you're making changes to the computer, which is dangerous.
another good thing to point out, is that you should not disable PE UNLESS you have it compensated for in OLFA AND _verfied_ that it will be stuck in Open Loop permanently.
I had a case where a guy bravely set PE to 1.0, but didn't lock it in Open Loop, so he got WOT, but he was in Closed Loop, so he never went below stoich at WOT! so verify that you're in Open Loop, before you got WOTing.
I tell ya Marcin....
Same 10 questions asked every day huh, it's like clockwork... 
Originally Posted by silverTA2002
And no, I don't completely understand how everything works together. That's why I'm asking questions.
Originally Posted by RedHardSupra
stop asking questions and start reading, these questions have been beat to hell already, and no, the sucky search isn't an excuse, just about all the basics you need to know are in the stickies.
When I have a question I haven't seen, I post a topic.
You've been extremely helpful so far. Why do you seem pissed off now?
The more I read, the more contradictory stuff I come across. Some people tune one way, others another.
VE tuning, for example.... Some uplug the MAF, other just set fail frequency to zero.
Some use LTFTs only, some STFTs only, some both.
Some set OLFA to zero, COT off, PE enable TPS and MAP to a high number. Some don't touch it.
Even the "stickies" disagree as to whether or not you have to tune VE above 4k rpm, and NONE of the "guides" I've read explain how to do it properly and safely without a wideband.
Isn't asking questions and discussing tuning ideas and helping the NOOBIES out what the whole idea of this forum is?
I've probably spent over 200 hours reading about tuning, and still don't know crap. So, please don't criticize me for "taking the easy way out" or whatever by posting a topic I don't know the answer to.
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Originally Posted by silverTA2002
I've read them. I've searched. I've been reading and tuning for 2 years now. But, I hardly know it all.
When I have a question I haven't seen, I post a topic.
You've been extremely helpful so far. Why do you seem pissed off now?
The more I read, the more contradictory stuff I come across. Some people tune one way, others another.
VE tuning, for example.... Some uplug the MAF, other just set fail frequency to zero.
Some use LTFTs only, some STFTs only, some both.
Some set OLFA to zero, COT off, PE enable TPS and MAP to a high number. Some don't touch it.
Even the "stickies" disagree as to whether or not you have to tune VE above 4k rpm, and NONE of the "guides" I've read explain how to do it properly and safely without a wideband.
Isn't asking questions and discussing tuning ideas and helping the NOOBIES out what the whole idea of this forum is?
I've probably spent over 200 hours reading about tuning, and still don't know crap. So, please don't criticize me for "taking the easy way out" or whatever by posting a topic I don't know the answer to.
When I have a question I haven't seen, I post a topic.
You've been extremely helpful so far. Why do you seem pissed off now?
The more I read, the more contradictory stuff I come across. Some people tune one way, others another.
VE tuning, for example.... Some uplug the MAF, other just set fail frequency to zero.
Some use LTFTs only, some STFTs only, some both.
Some set OLFA to zero, COT off, PE enable TPS and MAP to a high number. Some don't touch it.
Even the "stickies" disagree as to whether or not you have to tune VE above 4k rpm, and NONE of the "guides" I've read explain how to do it properly and safely without a wideband.
Isn't asking questions and discussing tuning ideas and helping the NOOBIES out what the whole idea of this forum is?
I've probably spent over 200 hours reading about tuning, and still don't know crap. So, please don't criticize me for "taking the easy way out" or whatever by posting a topic I don't know the answer to.
Originally Posted by silverTA2002
VE tuning, for example.... Some uplug the MAF, other just set fail frequency to zero.
Some use LTFTs only, some STFTs only, some both.
Some set OLFA to zero, COT off, PE enable TPS and MAP to a high number. Some don't touch it.
COT should be off if you don't have cats.
The people who change PE enable are the one's who modify the OLFA.
Even the "stickies" disagree as to whether or not you have to tune VE above 4k rpm,
and NONE of the "guides" I've read explain how to do it properly and safely without a wideband.
Isn't asking questions and discussing tuning ideas and helping the NOOBIES out what the whole idea of this forum is?
Anything else?
And just for the record, I've tuned other's cars MAF by dynair with no issues. My personal car is a bit of a ***** about it though, as up high it was pretty lean and down low it was rather rich. Tuning it with a wideband has worked out better but its still a little sketchy, especially in the lower Hz (from reversion more than likely - thanks RHS).
Originally Posted by D_Run
Same here, I read all stickys and how to´s i find... but they aren´t the same always something different. It would be nice to find a "how to" that is confirmed 100% accurate...
Maybe I am a quick learner because it only took me like 1-2 weeks to learn it well enough to tune closed loop and then tune WOT with a 100% accurate tune, the AFR in my PE table is my actual read AFR. And Im using old *** LS1 edit.
There are a lot of threads that will get you in the right direction, I have even made a fair amount of posts about my tuning experiences and the threads were very informative, all the gurus here help me out and posted.
I will say this, you can read read read all you want but until you just get out there and get your hands "dirty" and expose yourself to all kinds of conditions/exceptions/tests/trials&errors you will not see the big picture. Just as Brad mentioned, the stickies and write-ups are to point you in the right direction. I'd trust a good log file over a write-up anyday. I think the problem is that there are those of us out there who will go and spend the time on the streets or on the dyno or out at the track to learn this stuff, (and some it takes years, some it takes months, some weeks), while there are others who want to learn it all behind a keyboard. Unfortunately, for every person who makes a contributive effort to share a broad spectrum of knowledge, they create 100 "monkey see, monkey doers"
But something I've been thinking about for awhile is how there's no real introductory for newbs to explain how EFI systems work in modern vehicles today. I think it would be beneficial to have an understanding of how all the hardware interacts with the PCM and how it references the parameters. Then the parameters will start to make alot more sense and you will be able to follow the logic process the PCM goes through when deciding the hows/whens/whats. So who feels like making another write up!!! haha....
But something I've been thinking about for awhile is how there's no real introductory for newbs to explain how EFI systems work in modern vehicles today. I think it would be beneficial to have an understanding of how all the hardware interacts with the PCM and how it references the parameters. Then the parameters will start to make alot more sense and you will be able to follow the logic process the PCM goes through when deciding the hows/whens/whats. So who feels like making another write up!!! haha....
Exactly, once you understand what each sensor does and what role it plays in the overall system then you will know what is going on.
For anyone who may be afraid to just go and change some tables because they think it will mess the car up, the only real way you are going to learn is to just do it and see how the logs respond. Thats what i did, i got so confused reading the million different ways to do it and I just developed a way that I thought was best and hit the street for many hours and miles and figured it out, along with some questions here. There was a LOT of trial and error. Thats just a part of it.
For anyone who may be afraid to just go and change some tables because they think it will mess the car up, the only real way you are going to learn is to just do it and see how the logs respond. Thats what i did, i got so confused reading the million different ways to do it and I just developed a way that I thought was best and hit the street for many hours and miles and figured it out, along with some questions here. There was a LOT of trial and error. Thats just a part of it.
Originally Posted by txhorns281
But something I've been thinking about for awhile is how there's no real introductory for newbs to explain how EFI systems work in modern vehicles today. I think it would be beneficial to have an understanding of how all the hardware interacts with the PCM and how it references the parameters.
Hell, I've been working on my ve tables for the last 2-3 weeks and I'm just now getting some of this stuff figured out (with a little guidance from RHS and the stickies). Once my LC-1 shows up next week, we'll see how close I was tuning with LTFT's and STFT's.
