---===The Official MAFT-Pro Thread===---

[3000GT MR]

at idle what pressure are you guys reading? dumb question i know but i went out and bought a brand new MAP sensor and it reads the same as my old one which is -9.8 to 10.5 i know its wrong but it was from 2 sources and i really dont think i have that big of a leak to drop my manifold down that much. vacuum hoses arnt collaped or anything. i cant figure it out. any suggestions? it idles like junk and stalls out. its also in open loop/or med load. should i try a third one? it reads boost to a tee.... im out of ideas... thnaks

Chris

[Rogue_Ant]

Idling at -9.8 to -10.5 psi is fine. Vacuum in inches is twice psi.. so your actually around 20" of vacuum. Are you using Bob's .bin? What firmware version are you using on the T-Pro?
BTW your AFR gain is really high. Do you have an oscillating AFR at WOT?


-Rogue

[3000GT MR]

Originally Posted by Rogue_Ant

Idling at -9.8 to -10.5 psi is fine. Vacuum in inches is twice psi.. so your actually around 20" of vacuum. Are you using Bob's .bin? What firmware version are you using on the T-Pro?
BTW your AFR gain is really high. Do you have an oscillating AFR at WOT?


-Rogue

oh ok good. i started off using bobs bin. im pretty sure im running 4.8X. and yes i do have oscillating AFR.. i thought it was my wideband speed. i was going to slow the reading down to read every 1/16 of a second and n ot instantainiest. ill lower my gain first. thanks for the advice. where should i start to fix my idle issue? i've searched this thread and nothing seems to match my problem.

-Chris

[UCSB VR4]

New problem:

Sometimes after the car is completely warmed up, I think the ECU is getting stuck in closed loop mode when at idle. When this happens, the afr goes to 13.0 and sticks there no matter what. Any/all changes I make to the Maft Pro have no affect. I've verified this by changing the mainscale by + or - 30%, having no effect whatsoever on the AFR readings.

I have both my stock O2 sensors UNPLUGGED, so, how is the ECU going into closed loop mode when at idle? How can I resolve this issue? I absolutely need to figure this out if I stand a chance at passing smog!

Please any advice is greatly appreciated. I'd rather not plug the stock O2 sensors back in just yet as I feel the stock low fuel trim adjustments are too drastic and cause cycling rich/lean conditions at idle. I'd rather let pt tracking and the wideband make all the fuel adjustments at idle. How can I get the ECU stuck in open loop mode at idle such that maftpro adjustments affect the resulting AFR???

- Jeff

[3000GT MR]

Originally Posted by UCSB VR4

New problem:

Sometimes after the car is completely warmed up, I think the ECU is getting stuck in closed loop mode when at idle. When this happens, the afr goes to 13.0 and sticks there no matter what. Any/all changes I make to the Maft Pro have no affect. I've verified this by changing the mainscale by + or - 30%, having no effect whatsoever on the AFR readings.

I have both my stock O2 sensors UNPLUGGED, so, how is the ECU going into closed loop mode when at idle? How can I resolve this issue? I absolutely need to figure this out if I stand a chance at passing smog!

Please any advice is greatly appreciated. I'd rather not plug the stock O2 sensors back in just yet as I feel the stock low fuel trim adjustments are too drastic and cause cycling rich/lean conditions at idle. I'd rather let pt tracking and the wideband make all the fuel adjustments at idle. How can I get the ECU stuck in open loop mode at idle such that maftpro adjustments affect the resulting AFR???

- Jeff

i have the same thing going on. my idle is so out of wack between lean/rich, stalling. anything i try to do doesnt seem to do anything.i also have a CEL on with no code? i

ill post my setting under this post.

[3000GT MR]

I'd like to some opinions on:
*what you think i could do to get my idle better.
*CEL with no attached code.
* any other adjustments you think i should make.

Thanks in advance.
------------------------
TunerPro Bin Data Export
------------------------
Source File: april twenty five.bin
Source Definition: TPro4400.xdf

------------------------------
Constants
------------------------------

Vehicle Select 02
Number of Cylinders 6
Displacement 3.00 Liter
Airflow Source 0x00 Select
Manifold pressure source 00
Density Comp Source 0x00
Barometer Comp Mode 00
Frequency Out Mode 0x03
V Out1 Mode 0 Select
V Out2 Mode 0 Select
AFR Source 1 Select
Freq In Mode 0
Aux 1 mode 00
Main Scale -18.50
Volts Out 1 Setpoint 2.51
Volts Out 2 Setpoint 3.92
Afterstart enrichment 0.00
Tune Load Point, Low 36.40
Tune Load Point, Mid 100.10
Tune Load Point, High 143.00
Freq Out Max 0
Timing Monitor, Base Adjust 0.00
Timing Monitor, Correction 1.23
AFR Tracking, Enable delay 0.00 Seconds
Boost control TPS Spool 2.50
Boost control RPM Spool 2400 RPM
Boost control TPS Start 3.64 Volts
Boost control PSI Start 7.00 PSI
Boost control DC% Start 50.00 Percent
Boost control PSI Set 14.00 PSI
Boost control PSI Aux 10.00 PSI
Boost Control Gain 30.00
Boost Control DC% Start Aux 10.00 Percent
AFR Min TPS 3.18
AFR Min RPM 3200
AFR Min MAP 54.63
AFR correction lean limit 15.00
AFR correction rich limit 25.00
AFR correction gain 6.00
AFR Aux % 0.00
TPS Enrichment 0.10
TPS Decay 0.44
Throttle Body Size 6
MAP Enrichment 0.20
MAP Decay 0.30
MAP TPS Max 1.02 Volts


------------------------------
Flags
------------------------------



------------------------------
Tables
------------------------------

AFR Tracking

AFR AFR
2000 3000 4000 5000 6000 7000 8000
A/F Ratio 12.50 12.50 12.00 11.50 11.50 11.50 11.50


VE table

MAP(Kpa) RPM
00 400 800 1200 1600 2200 2800 3400 4000 4600 5200 5800 6400 7000 7600
320 78.0 77.0 77.0 80.5 83.5 87.0 90.0 93.5 93.5 92.5 91.5 90.0 89.0 88.0 88.0
300 77.0 77.0 77.0 80.5 83.5 87.0 90.0 93.5 93.5 92.5 91.5 90.0 89.0 88.0 88.0
280 77.0 77.0 77.0 80.5 83.5 87.0 90.0 93.5 93.5 92.5 91.5 90.0 89.0 88.0 88.0
260 77.0 77.0 77.0 80.5 83.5 87.0 90.0 93.5 93.5 92.5 91.5 90.0 89.0 88.0 88.0
240 77.0 77.0 77.0 80.5 83.5 87.0 90.0 93.5 93.5 92.5 91.5 90.0 89.0 88.0 88.0
220 77.0 77.0 77.0 80.5 83.5 87.0 90.0 93.5 93.5 92.5 91.5 90.0 89.0 88.0 88.0
200 77.0 77.0 77.0 80.5 83.5 87.0 90.0 93.5 93.5 92.5 91.5 90.0 89.0 88.0 88.0
180 77.0 77.0 77.0 80.5 83.5 87.0 90.0 93.5 93.5 92.5 91.5 90.0 89.0 88.0 88.0
160 77.0 77.0 77.0 80.5 83.5 87.0 90.0 93.5 93.5 92.5 91.5 90.0 89.0 88.0 88.0
140 77.0 77.0 77.0 80.5 83.5 87.0 90.0 93.5 93.5 92.5 91.5 90.0 89.0 88.0 88.0
120 77.0 77.0 77.0 80.5 83.5 87.0 90.0 93.5 93.5 92.5 91.5 90.0 89.0 88.0 88.0
100 77.0 77.0 77.0 80.5 83.5 87.0 90.0 93.5 93.5 92.5 91.5 90.0 89.0 88.0 87.0
80 70.0 70.0 70.0 75.0 80.0 82.0 83.5 88.5 82.5 81.5 80.5 79.0 78.0 77.0 77.0
60 66.0 62.0 62.0 67.0 71.0 75.0 78.5 82.5 71.5 70.5 69.5 68.0 67.0 66.0 66.0
40 62.0 56.0 56.0 58.0 63.0 64.0 68.0 69.5 60.5 59.5 58.5 57.0 56.0 56.0 56.0
20 57.0 48.0 48.0 51.0 53.0 55.5 58.5 59.5 51.5 49.5 48.5 47.5 47.5 47.5 47.5
00 44.0 50.0 50.0 50.0 48.0 49.5 51.5 53.5 46.0 44.0 43.0 42.0 42.0 42.0 42.0


AF User Tune Hi

RPM
400 800 1200 1600 2200 2800 3400 4000 4600 5200 5800 6400 7000 7600
Percent 0.0 0.0 0.0 0.0 0.0 0.0 0.5 2.5 4.0 5.0 4.0 3.0 3.0 0.0


AF UserTune Mid

RPM
400 800 1200 1600 2200 2800 3400 4000 4600 5200 5800 6400 7000 7600
Percent 12.5 9.5 10.0 10.0 10.0 10.0 10.0 10.0 10.0 12.0 0.0 0.0 0.0 0.0


AF User Tune Lo

RPM
400 800 1200 1600 2200 2800 3400 4000 4600 5200 5800 6400 7000 7600
Percent -0.5 1.0 1.0 1.5 3.0 3.5 3.5 4.5 5.5 0.0 0.0 0.0 0.0 0.0
Air Temp Correction

degrees
-40.00 13.00 41.00 62.00 82.00 103.00 129.00 173.00 315.00
Pecent -3.00 -3.00 -1.50 -1.50 0.00 0.00 0.00 0.00 0.00

[Rogue_Ant]

Originally Posted by 3000GT MR

oh ok good. i started off using bobs bin. im pretty sure im running 4.8X. and yes i do have oscillating AFR.. i thought it was my wideband speed. i was going to slow the reading down to read every 1/16 of a second and n ot instantainiest. ill lower my gain first. thanks for the advice. where should i start to fix my idle issue? i've searched this thread and nothing seems to match my problem.

-Chris

Chris,
First thing I would suggest is updating to version 5.03. And use Bob’s latest .bin that he posted a few pages ago (make sure you adjust the mainscale for your injectors).
I would also disconnect the battery for a little bit to reset the factory ECU. The ECU might have given up looking at the MAF input during idle.


-Rogue

[Rogue_Ant]

Originally Posted by UCSB VR4

New problem:

Sometimes after the car is completely warmed up, I think the ECU is getting stuck in closed loop mode when at idle. When this happens, the afr goes to 13.0 and sticks there no matter what. Any/all changes I make to the Maft Pro have no affect. I've verified this by changing the mainscale by + or - 30%, having no effect whatsoever on the AFR readings.

I have both my stock O2 sensors UNPLUGGED, so, how is the ECU going into closed loop mode when at idle? How can I resolve this issue? I absolutely need to figure this out if I stand a chance at passing smog!

Please any advice is greatly appreciated. I'd rather not plug the stock O2 sensors back in just yet as I feel the stock low fuel trim adjustments are too drastic and cause cycling rich/lean conditions at idle. I'd rather let pt tracking and the wideband make all the fuel adjustments at idle. How can I get the ECU stuck in open loop mode at idle such that maftpro adjustments affect the resulting AFR???

- Jeff

The ECU might’ve just given up looking at the MAF input during idle, which is why your changes aren’t having any effect.. I suggest resetting the ECU, and then tune – watch your AFRs and trims. Get the trims in line.

What T-Pro version are you using?


-Rogue

[UCSB VR4]

Originally Posted by Rogue_Ant

The ECU might’ve just given up looking at the MAF input during idle, which is why your changes aren’t having any effect.. I suggest resetting the ECU, and then tune – watch your AFRs and trims. Get the trims in line.

What T-Pro version are you using?


-Rogue

Hmm, okay I can try this and let you know what happens. FYI I feel that my current tune is good, car is running great... just every once in a while it get's stuck in closed loop mode. Tune is already on-par.

- Jeff

[3000GT MR]

Originally Posted by Rogue_Ant

Chris,
First thing I would suggest is updating to version 5.03. And use Bob’s latest .bin that he posted a few pages ago (make sure you adjust the mainscale for your injectors).
I would also disconnect the battery for a little bit to reset the factory ECU. The ECU might have given up looking at the MAF input during idle.


-Rogue

Thanks Rogue,
im going to try that right now.i tryed updating to V 5.03 but it didnt seem to do anything. it seemed like a folder upload only. do i have to open it up a speacial way?.. ill try to disconnect my battery right now and ill post up in a few hours and let you know how it is.. thanks again.

-Chris