For part throttle or wot?
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For part throttle or wot?
Both lol
Ok I'm guessing power enrichment eq ratio is for wot but still don't know which one to use for partial
Finally figured out how to get the log and tune to send on the forum lol! All I've done is what I was told to do to get the car idling decent, input appreciated! Still have the same questions as far as tuning spark and which fuel tables to use. And how to dial in what I've done so far with the quick instructions I got. Thanks!
These should help get you logging what you need to log to make the necessary corrections... Attached are Layout and Channel configurations for 3.2...
The MATH parameter "fuel correction" you'll most likely need to enter in yourself - it's ([7.156] + [6.156] + [9.156] + [8.156]) / 2
To dial in your VE table, you'll need to kill the MAF - then you can use the fuel correction parameter in the scanner to dial this in... Same goes for MAF dial in... You'll need a wideband for PE and open loop fueling, but you know that ;)
You may want to add in more channels? Then these have my widebands in them - you'll need to delete them out and put yours in to work with everything... Schpenxel has posted some pretty good write-ups on how to work the new scanner setups...
Hope this helps you.
Thanks GHuggins, so I should switch to the new 3.2 platform? Is it easier to use?
3.2 is way faster but you'll basically be starting from scratch, Scanner is totally different. Editor is about the same
Do you have a wideband? I don't have any of your logs open at the moment
Yep I have a wideband, basically the whole time it was bouncing between 14.5-15.5 very quickly the entire time
That's basically what it should be doing most of time. In closed loop fuel trims will get AFR to +/- 14.7
At WOT you can set the AFR you want with the PE EQ ratio. Stoich AFR / EQ Ratio = Commanded AFR. So 14.7 / 1.2 = 12.25 as an example
But.. it's up to the tuner to make actual WOT AFR and commanded AFR match. The factory O2 sensors are useless away from 14.7:1, so there are no corrections @ WOT. It's up to the tuner to make the AFR end up where you want it
If you're running MAF only then you'll adjust the MAF table to make it richer or leaner. Increasing values in the MAF table will make richer. Decreasing them will make it run leaner
Ok thank you so much! The maf calibration table or is there another maf table? And so the higher the eq ratio the richer wot is? And so if I command the wot to be a certain ratio it wont be actual so I will have to compensate? Or do I put eq ratio where I want it and then fine tune it with the maf table?
Oh and I'm figuring I would have to wait until its warmed up to tune so its in closed loop?
Are you logging your eq error vs maf table? If not here is a link on how to set up the maf table to log http://www.hptuners.com/forum/showth...er-V3&p=419231Quote:
Originally Posted by bloodcamarosexmagic
Once you have that table set up you will want to use eq error as the item that is plotting the value. Then go and log. Once youre done copy that tables values and...go into the editor, maf table and right click, multiply by percent. Down load and go log again. That should get your maf table in considerably better shap and get you pretty close. Its always a good idea i have found to hand smooth out thr table if there are any really big peaks of valleys.
You can also set up a second graph (exactly the same) but instead of logging afr error you can log ltfts, stfts or ltft/stft (what Ghuggins posted) and dial in your steady state cruising, idle and anything in closed loop with factory o2s and fuel trims.
Sorry if you already know this but it sems like you ars still a bit lost on how to do it. And i cannot blame you as i felt the same when i first started. I know i didn't really answer you question there.
Ok so sorry again but i know i always want to understand exactly whats going on, so if you already know this quit reading :) So the pcm uses the maf htz to calculate how much airflow is being drawn into the engine, with that it calculates how much fuel it needs to reach stoich. With a maf table that has larger values that tells the pcm that more air is entering the engine there for more fuel is needed vs smaller numbers less fuel. What youre doing is using the error between what maf htz values you have in the pcm at the time of logging vs what the pcm is having to do to correct that value. This only applies to closed loop fueling when the pcm is learning, once it goes wot you need to make those adjustment from your wideband error because the pcm only uses what you tell it via the maf table. All this is maf mode only, the same principle applies with the vve table but much harder.
Dude JBZ no need to apologize at all! And you were right to assume I still seem lost because I totally am and every bit of info that is explained helps so much. And no I was not logging that and had no idea that I had to so I will do that and post another log file. Thanks again!
Yes, MAF calibration table is the one I was talking aboutQuote:
Originally Posted by bloodcamarosexmagic
Higher PE EQ ratio = richer commanded
Change PE EQ ratio to change commanded. Change MAF table to make actual match commanded
Hello guys, hope everyone had a good holiday weekend. Ok so I think I am just starting to understand whats going on. But still have some questions... Once commanded is set do I have to keep going back and changing it or its set for good? And I have downloaded the log graph JBZ advised but am still not exactly sure how to apply it to tuning. Still have not really messed with fueling so I haven't screwed anything up yet lol, just not going over 2,500 rpm as I'm driving.
Multiplying maf by 1.1 was just a means to add a little more fuel as a safety margin until correct fueling is known, as a base start up program
Ok, so the baby was about ready for a nap so we went for a car ride for nap time. So I was still unsure about what PE was so I multiplied the table by 1.1 just to see what it would do and smashed the throttle and watched it go rich so I understand what that table does now. And saw the hot PE table and am assuming that it is for PE activation by throttle percentage. It's 30 percent across the board factory specs. Do people usually leave that alone? Also assuming that once I have PE table set then I can tune the maf cal. table then timing and then go back and forth between the two 'til its right? And if someone could elaborate a bit more on how to use the log table that I added to tune maf cal. that would really help! Thanks again!
you tune the ve and maf first, once you have hit the target(stoich) in all cells of ve, maf. Then you go back to pe. For pe to function correctly the base fueling must be correct. If you wanted a generic setting to place in the pe table, you could put in a base number in. Most guys use the same number across the board Usually 12.5-13.0
I would go 12.5 for starters. I find 12.8 is usually the sweet spot, however I find these on a dyno with a wideband.
if your stoich is 14.67,
your equation would be 14.67/12.5=1.1736. or 1.174
put 1.174 across the board, that will give you a consistent pe once your fuel tables are dialed in
to answer your question whether anybody tunes that table, yes most guys do, its a easy table to manipulate. A lot of tuners do what is considered PE raping, where instead of dialing in ve/maf at wot, they manipulate the pe table to get desired fueling. In my opinion not the best way of doing things, but guys have gotten away with doing it for years, so I guess to each their own