maftpro tipin stumble, 2krpm hickup....

[bwest]

(cross posted from http://www.fullthrottletech.com/showthread.php?t=3297)

question for you guys (new install)-

I have a real bad rpm stumble at initial tip in of the throttle, as well as a bad hesitation right around 2k. I tried fooling with the tps enrich and decay settings, and it improved some, but I noticed my values were way different than any others I could find.

I also noticed when playing the log back that the map pressure (inhg, not kpa) was significantly different than my digital boost gauge, which leads me to believe that the vaccum source for the MAP sensor is getting pinched some where...and I would imagine this would have a direct impact on this stumble that I am fighting....

Any input would be appreciated. Few notes: this is a really basic tune - PTT is off as well as FTT - right now I am trying to tune for VF as well as break the motor in.

engine set-up:
New engine (14mi so far)
JE pistons and rings, crower rods, clevitte clearanced @ .0015-0016, ati dampner, shimed pump, ARZ pump output, custom pan (7qts) oil cooler w/ 180 thermostat
fresh head (ferrea valves, springs, retainers), 550cc RC injectors, 2 1/2" IC pipes, Spearco IC, fresh TD06 on stock manifold.
IG timing @10deg btdc, cams are strait up (on adjustable gears), toyota 192thermostat, koyo rad, alum flywheel, DXD feramic clutch, marlin crawler R154


pro settings:
------------------------
TunerPro Bin Data Export
------------------------
Source File: tpro4600_brandon.bin
Source Definition: TPro4600.xdf

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

Vehicle Select 00
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 0x04
V Out1 Mode 0 Select
V Out2 Mode 0 Select
AFR Source 1 Select
Freq In Mode 0
Aux 1 mode 00
Main Scale -11.00
Volts Out 1 Setpoint 2.45
Volts Out 2 Setpoint 3.53
Afterstart enrichment 2.20
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 1.27
AFR Tracking, Enable delay 1.00 Seconds
FE Smoothing 30
Boost control TPS Spool 2.50
Boost control RPM Spool 2400 RPM
Boost control TPS Start 3.70 Volts
Boost control PSI Start 5.00 PSI
Boost control DC% Start 10.00 Percent
Boost control PSI Set 10.00 PSI
Boost control PSI Aux 10.00 PSI
Boost Control Gain 4.00
Boost Control DC% Start Aux 10.00 Percent
Boost Control Max RPM 0.00
AFR Min TPS 2.40
AFR Min RPM 3008
AFR Min MAP 161.30
AFR correction lean limit 10.00
AFR correction rich limit 18.00
AFR correction gain 5.20
AFR Aux % 0.00
TPS Enrichment 1.00
TPS Decay 0.30
Throttle Body Size 7
TPS MAP Max 0.00
MAP Enrichment 0.10
Boost Enrichment 1.20
MAP TPS Min 0.80 Volts
MAP RPM Min 1504.00
MAF Limit TPS Threshold 0.00 Volts
MAF Limit 0.00
MAF Limit / KRPM 0.00 Grams/Sec

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

AFR Tracking

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

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 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0


AF UserTune Mid

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 0.0 0.0 0.0 0.0 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 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0


Aux Triggered tune


400 800 1200 1600 2200 2800 3400 4000 4600 5200 5800 6400 7000 7600
Percent 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00


Air Temp Correction

degrees
-40.00 13.00 41.00 62.00 82.00 103.00 129.00 173.00 315.00
Pecent 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Edit/Delete Message

 

[NewWestSupras]

have you benched the tps to make sure its all good? I had a couple of bad spots on mine which caused similar probs. Perhaps swap it out...? no codes but it made a night & day diff with mine.

 

[dbsupra90]

try turning the boost enrich off.

try turning the boost control function off. one of the cars i was trying to tune it was causing some issues. atleast take that out of the equation.

might also try lowering the displacement to 2.8 or 2.9L that seems to help as well.

also, you say you have ptt disabled. 4.6 doesnt have ptt, 4.8 does. you sure you have the software, asd and xdf matching? you may try to do a hard reset on the mpro, then reflash the software version. i've had the best luck w/ 4.65

 

[bwest]

whoops, I thought I had updated this thread (I did over of FTT). anyway, here was Wednesday's results:
update:

moved the vac source and it was better. fooled with the TPS and MAP settings (in response) and it was much better still - almost stockish (good).

So I put ~ 25mi on it (gas station, through the mountains, etc) and here is the question(s) that I now have:

hot start: idles @ ~16.5:1 and then comes down to 14~ (30sec). No stumble if I let is settle out. Afterstart is 2.2, but I doubt that it affects hot starts. Can I tune this out or should I just not worry about it?

tuning for VF vs realtime AF: I will be cruising along with my af's @14.x and vf ~2v, then for no apparent reason, vf will drop to 0v, af stays the same. Let off the throttle (fuel is cut), pick the throttle back up, 14.5-15.5af, vf ~2v. Then after 30sec or so, vf drops to 0v, af stays the same.... any ideas there?

This is all on 4.65, so there is no PTT - so that can't be what is fighting the system. Ideas would be appreciated.

Here are my settings, have logs if need be...

------------------------
TunerPro Bin Data Export
------------------------
Source File: tpro4600_brandon.bin
Source Definition: TPro4600.xdf

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

Vehicle Select 00
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 0x04
V Out1 Mode 0 Select
V Out2 Mode 0 Select
AFR Source 1 Select
Freq In Mode 0
Aux 1 mode 00
Main Scale -10.00
Volts Out 1 Setpoint 2.45
Volts Out 2 Setpoint 3.53
Afterstart enrichment 2.20
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 1.27
AFR Tracking, Enable delay 1.00 Seconds
FE Smoothing 30
Boost control TPS Spool 2.50
Boost control RPM Spool 2400 RPM
Boost control TPS Start 3.70 Volts
Boost control PSI Start 5.00 PSI
Boost control DC% Start 10.00 Percent
Boost control PSI Set 10.00 PSI
Boost control PSI Aux 10.00 PSI
Boost Control Gain 4.00
Boost Control DC% Start Aux 10.00 Percent
Boost Control Max RPM 0.00
AFR Min TPS 2.40
AFR Min RPM 3008
AFR Min MAP 161.30
AFR correction lean limit 10.00
AFR correction rich limit 18.00
AFR correction gain 5.20
AFR Aux % 0.00
TPS Enrichment 0.50
TPS Decay 0.80
Throttle Body Size 7
TPS MAP Max 0.00
MAP Enrichment 0.40
Boost Enrichment 1.20
MAP TPS Min 0.50 Volts
MAP RPM Min 608.00
MAF Limit TPS Threshold 0.00 Volts
MAF Limit 0.00
MAF Limit / KRPM 0.00 Grams/Sec


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



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

AFR Tracking

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

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 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0


AF UserTune Mid

RPM 400 800 1200 1600 2200 2800 3400 4000 4600 5200 5800 6400 7000 7600
Percent 0.0 0.0 0.0 0.0 -2.0 -3.0 -3.0 -3.0 -3.0 -3.0 -3.0 -3.0 -3.0 0.0


AF User Tune Lo

RPM 400 800 1200 1600 2200 2800 3400 4000 4600 5200 5800 6400 7000 7600
Percent 0.0 4.0 3.0 1.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0


Aux Triggered tune


400 800 1200 1600 2200 2800 3400 4000 4600 5200 5800 6400 7000 7600
Percent 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00


Air Temp Correction

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

 

[bwest]

And then I drove it some more yesterday, made some additional changes and I think i'm getting there. The only issue I'm having is that the VF signal doesn't seem to be working anymore on the pro - so I'll check it at the diag block and see if its a wiring issue (shouldn't be, as all connections are soldered, but stranger things have happened). Here is where I ended up yesterday (idle around 15-15.4, cruise in the high 13s, low 14s). I also popped an IC coupling somewhere during yesterday's drive, so I'm not sure how its going to act when I run it next (after fixing the issue) - might need some more tweaking.

------------------------
TunerPro Bin Data Export
------------------------
Source File: tpro4600_brandon.bin
Source Definition: TPro4600.xdf

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

Vehicle Select 00
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 0x04
V Out1 Mode 0 Select
V Out2 Mode 0 Select
AFR Source 1 Select
Freq In Mode 0
Aux 1 mode 00
Main Scale -11.00
Volts Out 1 Setpoint 2.45
Volts Out 2 Setpoint 3.53
Afterstart enrichment 1.00
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 1.27
AFR Tracking, Enable delay 0.00 Seconds
FE Smoothing 30
Boost control TPS Spool 2.50
Boost control RPM Spool 2400 RPM
Boost control TPS Start 3.70 Volts
Boost control PSI Start 5.00 PSI
Boost control DC% Start 10.00 Percent
Boost control PSI Set 10.00 PSI
Boost control PSI Aux 10.00 PSI
Boost Control Gain 4.00
Boost Control DC% Start Aux 10.00 Percent
Boost Control Max RPM 0.00
AFR Min TPS 2.10
AFR Min RPM 3008
AFR Min MAP 144.39
AFR correction lean limit 10.00
AFR correction rich limit 18.00
AFR correction gain 4.40
AFR Aux % 0.00
TPS Enrichment 0.45
TPS Decay 0.80
Throttle Body Size 7
TPS MAP Max 100.16
MAP Enrichment 0.40
Boost Enrichment 1.20
MAP TPS Min 0.46 Volts
MAP RPM Min 544.00
MAF Limit TPS Threshold 0.00 Volts
MAF Limit 0.00
MAF Limit / KRPM 0.00 Grams/Sec

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

AFR Tracking

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

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 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0


AF UserTune Mid

RPM
400 800 1200 1600 2200 2800 3400 4000 4600 5200 5800 6400 7000 7600
Percent 0.0 0.0 0.0 0.0 -3.0 -3.0 -3.0 -3.0 -3.0 -3.0 -3.0 -3.0 -3.0 0.0


AF User Tune Lo

RPM
400 800 1200 1600 2200 2800 3400 4000 4600 5200 5800 6400 7000 7600
Percent 1.0 3.0 3.0 0.0 -3.0 -4.0 -4.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0


Aux Triggered tune


400 800 1200 1600 2200 2800 3400 4000 4600 5200 5800 6400 7000 7600
Percent 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00


Air Temp Correction

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