a little tuning help(positive ve)
Thread Starter
On The Tree
Joined: Apr 2012
Posts: 154
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a little tuning help(positive ve) i'm not getting much activity on hp tuners so i'm going to try here. basically i have tuned my ve table using several methods all with the same basic results. using ltft, stft, and wideband. i always dissabled maf and confirmed i got the engine code, and ran logs at operating temp. i have also tuned my maf.
everything looks and runs perfect while in tuning modes. the problem i have is when i turn maf back on after tuning, i have fuel trims over +10 all over my table. i am currently running with LTFT dissabled. is this a normal issue or am i missing something.
i've read over several tuning guides and hit every step with the same results.
everything looks and runs perfect while in tuning modes. the problem i have is when i turn maf back on after tuning, i have fuel trims over +10 all over my table. i am currently running with LTFT dissabled. is this a normal issue or am i missing something.
i've read over several tuning guides and hit every step with the same results.
i'm not getting much activity on hp tuners so i'm going to try here. basically i have tuned my ve table using several methods all with the same basic results. using ltft, stft, and wideband. i always dissabled maf and confirmed i got the engine code, and ran logs at operating temp. i have also tuned my maf.
everything looks and runs perfect while in tuning modes. the problem i have is when i turn maf back on after tuning, i have fuel trims over +10 all over my table. i am currently running with LTFT dissabled. is this a normal issue or am i missing something.
i've read over several tuning guides and hit every step with the same results.
everything looks and runs perfect while in tuning modes. the problem i have is when i turn maf back on after tuning, i have fuel trims over +10 all over my table. i am currently running with LTFT dissabled. is this a normal issue or am i missing something.
i've read over several tuning guides and hit every step with the same results.
you will have to set the MAF to 100% in control by changing the MAF High RPM Diable value to a lower value...
stock it is set to 4000 rpm...I set it to 600 for tuning MAF stuff, then either change it back when you are done, or set it to its max value so it continues to be a blend of VE/MAF at all rpms...which will be better for sudden changes in throttle position at higher rpms (like when you peddle it to control wheel spin)
you can run with LTFT disabled or re-enable them...or you can tune your MAF by wideband or a combo of all 3...
personally, I like to make sure the stock o2's also follow your stoic point in the wideband..other wise you have to relocate the stock o2's to get them closer to the heat coming out of the exhaust...if they trim weird, its usually because they dont have enough heat to work properly
there are some other solutions to the o2 issue...but they are more complex.
Teching In
Joined: Sep 2013
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From: Straya
If you have to change the MAF calibration a lot at higher airflows it is probably dirty or bad, from a quick glance through your log it looks like that might be the case. Give it a clean before trying to tune it. I use metho and q-tips, you have to be very gentle on the wires though.
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no q-tips needed...
just buy a few cans of MAF cleaner from the parts store...
clean over a bucket, and let the thing soak in a puddle of the stuff before you hose it off with more cleaner...
and its not necessarily dirty or bad...
stock calibration of MAF is for "ideal conditions on a bone stock motor".... which doesnt exist in the real world.
the MAF will need tuning to get it correct for your vehicle, your airflow, your turbulence, your complete setup
just buy a few cans of MAF cleaner from the parts store...
clean over a bucket, and let the thing soak in a puddle of the stuff before you hose it off with more cleaner...
and its not necessarily dirty or bad...
stock calibration of MAF is for "ideal conditions on a bone stock motor".... which doesnt exist in the real world.
the MAF will need tuning to get it correct for your vehicle, your airflow, your turbulence, your complete setup
Last edited by soundengineer; Apr 20, 2014 at 07:36 AM.
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Thread Starter
On The Tree
Joined: Apr 2012
Posts: 154
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yes, this is my daily driver and we have massive climate swings here in tx. I want my maf.
after my maf tuning i'm even more positive ft's and I go way lean at first start. i'm guessing I need to order a maf??
I took it out and cleaned it and notice PO descreened it.
after my maf tuning i'm even more positive ft's and I go way lean at first start. i'm guessing I need to order a maf??
I took it out and cleaned it and notice PO descreened it.
no...you do not need a new MAF
you either need to work on Afterstart Enrichment if its lean at first start when hot
or you need to work on your OLFA table if its lean on first start when cold
or a combo of both...
you either need to work on Afterstart Enrichment if its lean at first start when hot
or you need to work on your OLFA table if its lean on first start when cold
or a combo of both...
Thread Starter
On The Tree
Joined: Apr 2012
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here is a screen shot of my stft after lots of tuning of ve and maf. all looks good until I connect everything back up in my running tune. idk what i'm doing wrong or missing. maybe my NB o2 are still controlling fuel trims while i'm logging maf or something?
I am also noticing my truck is feeling lazy the more I tune.
I am also noticing my truck is feeling lazy the more I tune.
Thread Starter
On The Tree
Joined: Apr 2012
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i'm attaching my maf log I did. it appears that I get 0 to -3 on most cells upto a certain point then it goes positive larger numbers. this is where I believe my o2's are no longer in play, or I reach PE? every log I have done looks close to this one so inturn im subtracting throughout most of my scale and adding on the end, if my rpms reach high enough in the log. it feels like the more of this I do the weaker the truck feels. like i'm going the wrong direction each tune.
also i'm including my setup tune for maf cal, and ve cal.
edit, I just looked at this file. am I supposed to have my stft openloop disabled. im thinking I am
also i'm including my setup tune for maf cal, and ve cal.
edit, I just looked at this file. am I supposed to have my stft openloop disabled. im thinking I am
Last edited by tashspop; Apr 30, 2014 at 07:44 PM.
Thread Starter
On The Tree
Joined: Apr 2012
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well, i think i figured this out on my own but would like an assurance on this. i've download a few different tuning guides and followed them to my understanding. all of which would go through the file setup to tuning the ve table using a WB sensor. i've had great success with this.
next step on these guides was to setup your MAF tuning file by turning maf back on, (*and return everything back to normal, then> OL & CL enable all to 284F, Hi/Lo RPM thresh to zero, then log)
the way i understood this and setup my files, my STFT is still enabled so i am running closed loop chasing my tail.
if im right, all i need to do is use my same setup file for ve tuning which is open loop, maf fail Fq back to 16500, OL/CL enabled at 284, Hi/Lo rpm thresh to 0. correct???
next step on these guides was to setup your MAF tuning file by turning maf back on, (*and return everything back to normal, then> OL & CL enable all to 284F, Hi/Lo RPM thresh to zero, then log)
the way i understood this and setup my files, my STFT is still enabled so i am running closed loop chasing my tail.
if im right, all i need to do is use my same setup file for ve tuning which is open loop, maf fail Fq back to 16500, OL/CL enabled at 284, Hi/Lo rpm thresh to 0. correct???
Thread Starter
On The Tree
Joined: Apr 2012
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one more post here, i loaded my current maf tuning file up with no changes. then went to the on/off controls in my scanner and turned off closed loop and i get alot different maf error table. could i just use my current tune file above with this control shut off as a correct way to tune my maf?