Big Problem with VF Signal on MAFT Pro

[supraguy31]

Ok, Well I got all the codes worked out except the code 43 which is the Starter Signal. Ive had that code for a long time and I just connect the Stock starter wire from the MK2. I dont think that Code will affect the MAFT Pro

Oh, This is a 7MGTE powered MK2 supra just to let you know.

ok now. The only Problem that Im having right now is my VF wont move. Let me give you a Situation or what I did yesterday.

I pull the battery to clear all codes, Turn the Key to the on Position but not start the car, My VF Signal at the Check connector, and at the Maft Pro are reading 4.45, ok now as soon as I start the car it Drops to 0.02 and I can let it sit and Idle for 15 minutes and the VF will not change, I took it out for a Short Drive 2 miles and the VF stayed at 0.02 the entire time and my A/F is sitting at a Constant 18.3-18.6 even when Im driving (Yes car is running like pure **** at that time) The only way I can get the vf Signal to read anything again is to Disconnect the battery and basically reset everything. Turn the Key to the on Position and it reads 4.45 again.

This is my main Issue right now, For some reason Im not getting anything telling the ECU to adjust fuel or whatever it has to do to read 14.7

Here are my Settings as a Friend of mine has the same car with the same engine and he said his settings should work fine so he Sent me is Bin files and all, Only Difference is that his is a 91 and mine is a 88.

TunerPro V.4.14

Vehicle Select: 00
Number of Cyl.: 6
Displacement: 3.00
Airflow Source: 00
Manifold Pressure Source: 00
Load Source: 00
barometer comp mode: 01
Freq out mode: 04
V Out1 Mode: 0
V Out2 Mode: 0
AFR Source: 3 Im using the AEM Wideband connected to the Analog wire, It also has a blue for Datalogging but was told not to use that blue wire.
Freq In Mode: 20
Aux 1 Mode: 00
Main Scale: -25.00
Volts out 1 Limit: 2.51
Volts Out 2 Limit: 3.61
Afterstart enrichment: 12
Tune Load Point Low: 14.30
Tune Load Point Mid: 106.60
Tune Load Point High: 149.50
Freq Out Max: 0
Timing Monitor, Base Adjustment: 0
Timing Monitor Correction: 0.00
FE Smoothing: 30

Im not using any of the boost control settings because I dont know how to set them up for 16 psi and he doesnt use the Boost controller for the MaAFT Pro. Mine is just connected.

AFR Min TPS: 2.50
AFR Min RPM: 2016
AFR Min Load: 100.16
AFR Correction Lean Limit: 20.16
AFR Correction rich Limit: 20.00
AFR Correction Gain: 8.00
AFR Aux % 0.00
AFR Tracking, Enable Delay: 0.00
TPS Enrichment: 0.50
TPS Delay: 0.80
throttle Body Size: 7
TPS Map Max: 104.06
Map Enrichment: .040
Boost Enrichment: 0.00
MAP TPS Min: 0.40
MAP RPM Min 2304.00
MAF Limit TPS Threshold: 0.00
MAF Limit: 0.00
MAF Limit/KRPM: 0.00
MAF Limit RPM Min: 0.00
MAF Limit Time:0.00
Part throttle Tracking Idle TPS: 0.00
Part throttle Tracking Ild RPM: 640
Part throttle Tracking Idle A/F Ratio: 13.50
" " " Cruise TPS: 0.00
" " " " RPM: 2560.00
" " " " Load: 91.05
" " " " A/F Ratio 14.50
" " " Lean Load: 84.55
" " " Lean Delay: 10.00
" " " Lean A/F Ratio: 16.00
" " " Gain: 15.00
" " " Startup Delay: 74.51
Enhanced TPS RPM Threshold: 3008.00
Enhanced TPS Load Threshold: 117.96

Please someone tell me what the Heck I need to do here. Been working on this for 3 days now without any results

 

[supraguy31]

Only way this setup will Idle to 15.5 without any Bumps or anything is I have to set the Mainscale to 20. I know that this isnt right but I wanted to Point this out. Still VF signal is not reading after 20 Minutes as engine is completely warm.

 

[88targarose]

I posted on Full Throttle tech., You need to get rid off the Part Throttle Tracking and AFR tracking BS, whoever gave you the BIN likely made your job far more complex.

 

[supraguy31]

Did that, Now car run 10X better than before. Thanks for that Imput.

Now I need to figure out why Im not getting a VF signal Period, Ive checked at the Check connector and when the engine is complete warm, (30 Minutes) the VF signal from the Check Connector is 0.08 and just sits there. I replaced the O2 sensor to rule that out but no change.

 

[dumbo]

hey i'm new to all the maft pro stuff too, just got my car running and idlesing about 4 days ago, where do you read the Vf signal on the maft/tuner pro. not to jack the thread but i'll be follwoing all of this stuff close, thanks

 

[CRE]

Vf shows up under Ax1 in the SensorMonitor screen in the MAFT Pro and as "Aux Input 1 Voltage" in Tuner Pro.



Supraguy31, go back over your wiring and make sure you haven't connected anything to the OX wire which runs to the ECU.

 

[supraguy31]

I havent, On my AUX Imput 1 its reading 0.00 and flickers to 0.02, Im not getting anything else. Like I said before, When I reset the ECU (Disconnect the battery) and I put the power wire on a Accessories Switch, I turn the Key once I see 4.45 volts at the check connector and the MAFT Pro, As soon as I turn the Key to the next Position everything goes straight to 0.00 and stays there period, Doesnt matter if Im driving the car or Its Idling for 10 Minutes.

 

[CRE]

I said check OX, not Aux.

 

[supraguy31]

Im not tapped into OX, Im tapped into VF on the Engine harness and the MAFT Pro Purple wire off the 6 pin connector. VF is a Small gray wire, Middle harness, Bottom row, Third from the end.