well the truck runs way better with the maf unplugged. been trying to do my ve calc but all the numbers are way lower then what is already in my ve table not sure what is going on with that.
well the truck runs way better with the maf unplugged. been trying to do my ve calc but all the numbers are way lower then what is already in my ve table not sure what is going on with that.
Kelly:
Not sure what you are doing here. The CALC.VE Table is for closed-loop MAF-enabled tunes.
Are you truing to do a SD Tune? Closed or Open-Loop?
If you want to do a SD Tune, unplugging the MAF is not the way to go. Look at the AUTOVE Tutorial concerning C2901-C2904. You still have them enabled in your Tune.
You can't do CALC.VE Table unless your MAF is enabled. But unless you specifically have a need for a SD Tune, it is really not necessary. If you are ditching the MAF, then CALC.VE Table will not really help you...
well I first said I don't know what I am doing. LOL that makes more sense. I had unplugged it to see how it ran and it runs so much better so i guess I need to do the calc.ve and try and get my maf calibrated because it runs like poo with is plugged in compared to when its not
Kelly:
No problem. It can all get very confusing.
I re-reviewed your Tune and Log. Even though unplugging the MAF is not first choice, it does appear that you successfully failed the MAF. So, what you were running was Speed-Density (SD) closed-loop. That is O.K. Your Trims were very similar to the first log (that is good).
So ironically you were indeed running off the VE Table you have in your Tune. If that VE Table was from your original CALC.VE Values, then that is even better news.
Your Spark defaulted to Low-Octane. Perhaps that is why it felt like it ran better?
Here is the bottom line. Are you keeping your MAF? If you want to bypass it and run SD Closed-Loop..it is good news..you already are. You just need to realize that without a COS, you will be running off one Spark Table..Low Octane.
interesting. If its running of the ve table even with the maf plugged in why does it run like crap compared to it being unplugged.
With the MAF plugged in, the majority of your Airflow and Trim calculations are indeed coming from the MAF. Some people don't like running off the MAF. The MAF frequency oscillates a lot, there is sometimes a restriction..etc. Some people just like the feel of SD and prefer it.
Personally I run MAF. I do clean the MAF sensor every other month and have familiarity tuning it. You always want your VE Table and MAF airflow calculations to be as accurate as possible. Remember, the CALC.VE Table Tutorial was designed simulating a total MAF Failure. It is possible to tune both, but in all honesty a SD closed-loop Tune can be just as accurate and reliable. A SD Closed-Loop Tune simply utilizes the Trims correction plotted against the VE Table. Its very simple and very clean to do.
Again, just remember you will lose some functionality with Spark and Misfire detection..unless you run a COS.
Good luck. We can help you out no matter which way you want to go.
I will plug it in and keep working on my calc.ve. If I can get it to run as good with the maf plug in as it does with it unplugged I wouldn't care if its there or not. Time to go for a ride and do some logging. LOL
Thanks Weatherman. might go to cos but, not until I see if I can figure it out. Besides it kinda fun. By the time I get this all kinda figured out I can do my motor swap and be able to tune it correctly
ok that seems better. I lowered c2907 to 400 vs 4000. ran another log. I lowered my ve table so I am sure what that means but, take a look and let me know if I did it right.
As far as I can tell your CALC.VE Table Log and Tune look perfect.
All your trims are good and other than some minor smoothing on your VE Table, it looks good. You are still picking up some 'KR'..right off hand some of it looks 'false', but occasionally it has more of the sawtooth pattern evident of slight detonation. How we doing on that wideband?.
Where is your MAF located in relationship to your air-box and intake? Just keeping your air filter and MAF clean help a lot. If you feel your MAF is a 'problem', just a slight change to C2901-C2904 will allow you to 'disable' the MAF, but keep the ability to log the MAF frequency. Just a thought.
Overall, looks very good..Congratulations..now just hit WOT with a wideband!
whats the best way to smooth it out?
wideband will probably get ordered friday. (payday) Was looking at the autometer since I already have some in my truck but, then started looking at the MTX-L
Maf is located about 6" from the filter and about 18 to 20" from the throttle body
Posting Permissions
Reply With Quote