Woooohooooo MAFT-Pro is running !!!
- Thread starter chriso
- Start date
Yes, thank you I got it. I haven't had a chance to upload it to the pro yet since I was still fooling with my knock sensor issue (which I finally figured out). I loaded up your files on the tunerpro software and was playing around with the program.mhopemk3 said:
I did do the 4.63 update (I think) on the pro unit and my car ran even worse than it did before. There is a bad smell of gas when I first start it up and my AFR are all over the place. At around 2500-4000 rpm's I have what sound like a terrible miss. I don't want to run it until I get the pro straightened out since, like I said, my AFR's are from <10 to >18.
Check to see what your stock o2 is reading. Your stock o2 should be reading around 2.5. Not sure what Wideband you are using. I hope with your afr comment you have a WB. If so pull it out of the pipe and recalibrate it. When the maft pro turns on it will tell you what version you are using. Upload that Bin I sent and see how it runs..
Did you upgrade your fuel pump?
Did you upgrade your fuel pump?
Wideband is AEM UEGO (30-4100), Walbro 255 and RC Engineering 550 injectors. Hopefully tonight I can get my laptop hooked up and I will start getting some information. Thanks again for your help.mhopemk3 said:
Ok Matt, I was able to fire up the laptop and connect to the pro. I uploaded your file and it worked pretty good. I have less of a stumble going from idle to acceleration. I still have to work on the AFR's and my boost control (that is another story). At idle it stays within 14.5-15.2 which I think is pretty good and when I am cruising, with the rpm's remaining fairly constant, the AFR stabilizes. However, when I am accelerating or decelerating the AFR's are all over the place oscillating between 10-18 and gradually settle out. Does anyone know which setting(s) keeps this in check??? or is it RPM dependant.
Keep in mind that when you shift The AFR's will go rich even more so with an aftermarket BOV vent to atmosphere.. When you let off the gas it will probably peg lean which it should. I am curious on the sweep to rich when you press the gas. How much throttle are using when it goes rich? These are probably where some tweaks need to be made. The bin I sent you is adjusted to my TPS which is at .51 at idle. What is your TPS @ Idle? If you are using a laptop connect it up and record a 15-20 min drive and go back and see what's happening when the sweep occurs.
chriso said:
Those are the settings that I input on 4.40 I think. Went to 4.65 and then back to 4.63. Still jerkin around with it. Matt is helping me a great deal.
Wayne
TPS at idle is .42 btw. Tonight I did a couple more runs and things look like they are settling out with a little more tweaking. I am still all over the place with my AFR though. During a boost cycle, my AFR looks good in the 14's until I hit about 3/4 into the boost then it pegs out rich, it doesn't seem to matter at which RPM I am at either. What is that telling me???? Anyone?
Yea, pimp may be on to something there. You could be going into afr tracking. That by default will throw you rich. The question would be when you boost 3/4 what is your tps at? What is your MP at? These "could" be starting points of the richness. I would also ask what RPM (roughly) does this happen if your 3/4 the way through boost? Could be your mid and high tune as well..
If I posted a screen shot of my monitor that would probably be able to explain it a lot better than me. Can someone explain how I would do this.
I was under the impression that if you set the AFR, the Pro would compensate to maintain that under all ranges....
I was under the impression that if you set the AFR, the Pro would compensate to maintain that under all ranges....
chriso said:
take a look @ the manual, p. 22, it outlines what all the AFR tracking parameters do....
Chris. To take a screen shot of your monitor push "Print Screen" (Next to F12 usually)
Then go to an image program such as Paint(I use Irfan view for this crap, Ill get it for you enxt time I stop by)
Open edit and paste it in there. Save it as a JPEG and then host it up
Then go to an image program such as Paint(I use Irfan view for this crap, Ill get it for you enxt time I stop by)
Open edit and paste it in there. Save it as a JPEG and then host it up
A couple of questions however regarding the AFR Tracking.drjonez said:
1. At what point does the ECU operate in "Open Loop" vs. Closed Loop? And how do I know?
2. My gain is set to 0.00 and I still have the oscillating thing happening.
3. Isn't the perfect stoich at 14.7? If so, then shouldn't my AFR be set at this consistently across the board during all operating parameters? Or does that not apply under heavy load conditions?
4. AUX% - What auxiliary could one use to activate this for example?
It has been my understanding that in order to properly tune a vehicle, you would closely monitor the AFR conditions. Your goal is to make this reading as close to 14.7 under all operating conditions....is that not correct? Or, under higher load conditions (ie under boost, heavy acceleration, etc...) would you want a slightly rich condition, say in the 11.5-12.5 range?
from my understandings, idle, cruise and slight load, (still in vac, below boost) you want 14.7 , the stock ecu should attain this, and go lean ,rich,lean ,rich,lean,rich,lean,rich,lean so numbers would show below 14.7, above 14.7 and should average out to 14.7
also from my understanding, any boost scenario, you want atleast 11.5 from what im hearing any leaner and you will be on the virge of detonation
also from my understanding, any boost scenario, you want atleast 11.5 from what im hearing any leaner and you will be on the virge of detonation
chriso said:
>70% TPS and above 3500 RPM or so.
chriso said:
the stock ECU is doing the oscillating.
chriso said:
yup, stoich for gas is 14.7. nope, you should NEVER tune to that @ WOT. 14.7 is the "ideal" ratio.....i.e. in a perfect world. the only time you'll see that AFR is during cruise and idle.
forced induction cars should be tuned for approx. 12.0 or so @ WOT. exact ratio depends on how crazy you feel and what fuel you're running.
chriso said:
meth/alky/water inj.
chriso said:
you're close. the idea is achieve desired AFR and to satisfy the ECU, monitor Vf.
drjonez said:
Excuse me if these are questions that have been covered before:
If the ecu is doing the oscillating, and the gain is at 0.00, does adjusting the gain help to counteract this condition?
I think most of us understand what we are trying to accomplish, its just getting it handled that some of us are having trouble with. You say we need to monitor Vf, man I don't have clue as to what it should be.
Care to elaborate on Vf.
Again not trying to sound like a dick, hoping I'm not coming across that way.
Wayne
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