MAFT-Pro Tuning Thread Unofficial and Uncensored

[Adjuster]

Any thing like making timing based on manifold pressure?

IE: when you are running a larger turbo, and you hit the gas, it allows additional timing advance untill the manifold pressure comes up, and then it adjusts to the changes real time v/s off some set map/parameters based on RPM/TPS/KS (Assuming the TCCS uses that combination to set the timing advance now.)

This low boost, open throttle "kick start" would really help with spool up I believe (Especially if the fuel is already being fooled into adding more, it's going to pull timing somewhat right? Not exactly what you want for that second or so while the turbo is spooling up to speed. I'd want to pull/adjust timing based on MAP/TPS v/s RPM/TPS?

Just thinking out loud.

 

[polobai]

sounds like a dumb question, but where do I update to the newest software, and is there a walkthrough somewhere to do it?

 

[drjonez]

there are no dumb questions.

fullthrottletech.com

 

[kmfdmk]

there are no dumb questions.

fullthrottletech.com

I did a quick search in this thread for MT, Manifold Temp. On my setup the GM AIT that sends the Manifold Temp (MT) to the MAFT-Pro is located directly in front of the turbo intake.

Would it not aid the efficiency of performing Speed Density calculations to have the AIT/MT sensor located directly in the manifold, or immediately prior to the Throttle Body?

Just a thought, has any one else thought of this? Is any one else running like this? Are you experiencing heat soak with it immediately prior the TB?

EDIT - Just read the User Manual for the MAFT-PRO and saw that installing it prior to the TB or in the Manifold is suggested.

 

[CRE]

Damn... I was looking forward to a snack. :evil2:



The one problem that people encounter with putting the IAT over the engine is heat soak. I would always (as a bare minimum) put it in after the IC though.

 

[polobai]

I am having a problem running past 19-20 psi on my setup. With a maf pro v 4.4 (i like this one), i cant seem to get past fuel cut. I am tuned at 11.5 afrs, no boost leaks, and no other problems. I have full supporting mods on my gt 4082, but cant figure it out. I remember reading about putting a hertz block on the maf pro unit, but i dont know where to set it or how it affects previous tuning. Anyone have any other ideas? I would like to run about 25 psi on methanol without hitting fuel cut (and no i dont want to try a FCD). Thanks!

 

[dumbo]

Has anyone got the spark control working, i just finally tried to start my car after about 2 months, went na-t. i updated my maft pro to version 5.11

my car is throwing codes 24,32 intake air temp, and air flow meter(i'm guessing cause i am running speed density.

right now i have the timing control hooked up like this.. http://www.turboninjas.com/supra/ma...ra/Timing control connections for a Supra.pdf


but i think it has to be like this right? http://www.fullthrottletech.com/attachment.php?attachmentid=916&d=1216749530

it doesn't even try to fire,
i can smell fuel from the tail pipe so i figure its spark.

any help or advice is appreciated, thanks.

 

[spoolint78]

quick question, for the pt tracking idle and cruise the stock o2 sensor must be disconnected to go into open loop. However, when you set up the pt tracking for idle and cruise via the maft pro and confirm that it works, when you connect back the stock o2 sensor doesn't the ecu just override all of those settings on the maft (idle and cruise a/f) and just go back to what the ecu was setup for?

 

[dumbo]

quick question, for the pt tracking idle and cruise the stock o2 sensor must be disconnected to go into open loop. However, when you set up the pt tracking for idle and cruise via the maft pro and confirm that it works, when you connect back the stock o2 sensor doesn't the ecu just override all of those settings on the maft (idle and cruise a/f) and just go back to what the ecu was setup for?

sorry dude your beyond me, my car wont even start yet, but i think i figured it out. tell you in a few days.

 

[djordan97]

quick question, for the pt tracking idle and cruise the stock o2 sensor must be disconnected to go into open loop. However, when you set up the pt tracking for idle and cruise via the maft pro and confirm that it works, when you connect back the stock o2 sensor doesn't the ecu just override all of those settings on the maft (idle and cruise a/f) and just go back to what the ecu was setup for?

you are correct sir. if you re-hook up the stock o2 your car will no longer run in open loop and the tccs will try to override the maft-pro.

 

[CRE]

when you connect back the stock o2 sensor doesn't the ecu just override all of those settings on the maft (idle and cruise a/f) and just go back to what the ecu was setup for?

If I follow your question then NO. You must disable part throttle tracking (idle, cruise and lean AFR tracking) if you reconnect the stock O2 sensor. Otherwise the car will probably run like crap as the ECU fights with the MAFT Pro.

 

[spoolint78]

CRE, so in other words the pt tracking idle and cruise is only good if the stock o2 sensor is disconnected all the time and therefore in open loop, correct?
So the pt idle and cruis tracking is ineffective with the stock o2 plugged back in.

 

[CRE]

CRE, so in other words the pt tracking idle and cruise is only good if the stock o2 sensor is disconnected all the time and therefore in open loop, correct?
So the pt idle and cruis tracking is ineffective with the stock o2 plugged back in.

Correct. You can still use WOT tracking, as long as you make sure it doesn't come in until you're in open loop.

 

[spoolint78]

cool, so i guess the pt tracking for idle and cruise is pretty much useless for those who still have there stock o2 sensor connected which I'm sure is 99% of us.

Now a question on tuning. When I come off the gas slightly my a/f's go rich around 11 af's anyone have experience with leaning that out on decel?

I set the tps decay to the max 2.00 (btw using version 4.80) and when I do let off slightly it goes rich.

 

[CRE]

cool, so i guess the pt tracking for idle and cruise is pretty much useless for those who still have there stock o2 sensor connected which I'm sure is 99% of us.

Errr, from everyone I've talked with I suspect the second 9 you typed there is in error. Should read about 9%.

cool, so i guess the pt tracking for idle and cruise is pretty much useless for those who still have there stock o2 sensor connected which I'm sure is 99% of us.

Now a question on tuning. When I come off the gas slightly my a/f's go rich around 11 af's anyone have experience with leaning that out on decel?

I set the tps decay to the max 2.00 (btw using version 4.80) and when I do let off slightly it goes rich.

You should update your software. The newer versions (5.x in particular) have had a fair amount of refining with regard to the enrichment and decay calculations.

Post up the rest of your setting so we get a better picture of how you've got things set. A number of things can cause you to go rich when you let off the throttle.

Where are you getting the vac source for the MAP sensor from?

 

[atlpd3147]

I noticed today that while on my laptop using tunerpro my readings for wideband was showing 10:1 but my actual plx wideband was showing me a reading of about 14.6:1 has anyone had this same issue? What should I be looking for to fix this? Thanks for any advise.

 

[CRE]

Using a cig lighter adapter to power the laptop? Is the MAFT Pro set for the correct wideband? Are you sure you've got a good connection and that the WB's analog out is set up properly?

 

[atlpd3147]

no im using my flux capacitor to run the laptop. but seriously though i set up the maftpro to read the output of my plx wideband. i know theres a number which must be set on the maftpro but im not near my car at the moment. im running maftpro version 4.65 and i am pretty certain the wiring is done correctly. ive had my maftpro wired in since 2006. if im not mistaken the plx wideband is the same number as the aem 5v widebands. so whatever that number would be on the maftpro setup i think thats the same number i need to use.

 

[CRE]

Har har... funny guy. I asked for a reason.


Does the reading on the MAFT Pro (SensorMonitor section) Show the same as TunerPro or the same as the wideband? A corrupt definition file for TunerPro's not unheard of.


If you've got the input set correctly then the next things to look at are:

Sensor ground and MAFT Pro's sensor ground... need to be wired to eachother and not the chassis. If your WB doesn't have a sensor ground then you need to wire the MAFT Pro's to the place where the WB is grounded. Otherwise you may create an offset like the one you're seeing.

If the wideband's analog output is programmable, make sure the scaling is correct.

Make sure all of your wiring connections are solid.



EDIT:
Oh and if you've had this wired since 2006 was the wideband previously accurate or is it a new addition? Wiring can break and connections can weaken... check it just to be sure.

 

[atlpd3147]

will check what u suggested thank you.