T4M2 Strategy with TunerPro is an Awesome Start but stall Issue

[JOESTANGMAN2024]

So i finally have my fuel dialed in on a stock J4J1 strategy and changed all my load values for N/A to add .9 load and setup my new spark tables car runs great along with a 100 other settings. So i thought i would move on to TunerPro and setup T4M2 and went through all the required values for startup tune and loaded my Prom24 maf curve along with all the other modifications neccessary. Moving Forward I want to use TunerPro i need to overcome this latest hurdle.
Car Started right up and idled fine initially. Cruising and Wide open is amazing love this tune. Then Car would stall on deceleration or out of gear while moving. Recalibrated and reset my idle it stabilized after a Kamrf reset. Same Stall Result

1. Datalogged my idle and watched Kamrf drop down to .70 at idle not sure how far adaptives go but currently idle is extremely rich. My Maf curve needed a 1% change with the J4J1 tune. i am missing something in this tune
2. I remapped my Maf curve to pull 5% fuel from .8 volts down and car flopped and loss some power this didnt work. Something is skewed causing Kamrf to drop like this.
3. As for CID i used 302 high and low slopes are both 24lbs similiar to J4J1 with same breakpoint and Offset.
8. For Crank PW FN348A Used same values as J4J1 with 24lb injectors so i lowered all these values meant for 19Lb injectors.

[decipha]

did you put your injector high slope in first before doing anything?

after you put your injector data in then you need to put in your maf and all else.

you need to remove fuel at idle, either your maf is jacked up or your low slope or offset is wrong.

[JOESTANGMAN2024]

Hi Decipha i used your template and merely used the same conservative values from J4J1. The first thing i did was get the Maf Curve setup.

1. input the stock prom24 curve first
2. ALOSL, AHISL Injector Slopes used 24lb high and 24lb low same for both
3. FUEL_BKPT Injector Breakpoint used the same breakpoint in the J4J1
4. FN 367 Injector Offset used same a J4j1
5. FN 2200 Borderline Spark Table kept same values
6. FN 035 Load Scaling used the same load values in TunerPro
7. FN 348A Crank PW wasnt too sure about the values in this Table as this is rated in LBs in Tunerpro and Caledit uses PW in msecs

So i did a conversion from 19 to 24 lb injectors and not sure if my calculations are correct i do not have a new engine size so the 2nd part of the equation will equates = 302 19/(new injector size) * (new engine size)/302
this is my Crank PW FN348A as it appears in Caledit after changing it in TunerPro

[decipha]

yep thats all wrong

first you have to put the injector high slope in before you can do anything

[JOESTANGMAN2024]

When i updated the Maf in TunerPro i only changed the Volts table and not the Ad Cts tables does Tuner Pro make the neccessary adjustments to the Ad Cnts table.

[JOESTANGMAN2024]

Ok changed my hi slope 1st to 24.9 then changed the rest of the parameters after this

Lo Slope 26.2
BP .00002219
Inj Batt = Man spec
Maf - Volts only to Prom24

Still had to add 30% to the Maf would this make sense as this is quite high.

[decipha]

If you put in 24lb injector data then the maf is already setup for 24lb scaled injectors.

If you changed the maf then you screwed up as your maf curve should match whats already in there. If it doesnt then your maf is wrong.

I have no idea what you mean by maf volts only to prom24 ???

[JOESTANGMAN2024]

Hi Decipha thanks for your reply I really value your input
1. Are you telling me to leave the default Maf settings as they are in this strategy I assumed the Stock T4M0 has 19 Lb injectors so changed it to 24.830 little confused here.
2. Do you recommend i leave hi slope and lo slope of equal value J4J1 uses 24.830 hi and lo
3. Clarification to above enquiry about Volts to Prom 24 - I changed the Maf Curve to the stock Prom 24 curve as suggested.
I think my confusion stems from the instructions as posted in tuner pro
1. Change the high slope to 30 - Then put the actual injector high slope in this scalar and go back and update those other 4 parameters to what they were prior - Is this correct not sure whether to use 30 or 24.
2. When changing the other 4 parameters it sounds like you want us to use the original settings that were in the strategy prior to changing the hi slope. I Modified these settings to the Manufacturers published data for 24 lb injectors
3. If you have a functioning tune and just want scaled values to be shown then change the Scaling percentage scalar to 1. This is already set to 1 by default so i did not change this.
So Sorry Decipha I think i am missing something I cannot nail down the above instructions as posted as the very first line in the instructions state Changing this value will cause the injector low slope, breakpoint, sarchg, and maf to be updated. I updated all 4 parameters is this the mistake i made.

[decipha]

Read the fuel write up and the maf write up on the homepage.

You have to put the fuel injector high slope value in first before you can even open up any other values to view them.

1-No, if you put in 24lb injector data then the maf will be setup for 24lb injectors. This is because changing the injector high slope doesn't really change anything it only changes the values tunerpro displays. Think of it this way, changing the injector high slope is like telling tunerpro that your new injector is actually the stock injector size. Its not like any other tuning software where your just changing the fuel injector size itself.

2-plug in your actual data for your injectors

3- the pro-m curve was already in there from stock, will make sense after you read the maf and fuel write up

4- no, the high slope is the actual size of your injectors and the high slope value from your injector data sheet.
30 is the K-CONSTANT, the default value for the k-constant is already 30 in the t4m2 cal.

2- you enter your actual injector data

3- if its 1 then you screwed up big time, stock value shouldn't even be 1

yes, if you change the high slope for 24lb injectors then the stock maf will match your flow sheet. If it doesn't then your maf sheet is wrong.

correct, anytime you change the injector high slope then the low slope breakpoint and sarchg will change as well as all other SP** values.

[JOESTANGMAN2024]

Hi Decipha thanks for the detailed explanation.
Read through the fuel writeup and understand how the K-Constant comes into effect now. So getting started i came up with a step by step procedure for this T4M2 strategy for others to follow. Would love your input i am using my 75mm Pro-M 24lb Maf, FRP 24lb injectors, Fuel Pressure currently set to 40lbs. No Current Tunes starting fresh with TunerPro once i get this up and running i will purchase EEC Analyzer to get familiar with that software and hopefully get my hands on a quarterhorse before next spring.

Procedure
1. Open TunerPro
2. Select XDF File Cbaza.xdf
3. Open File T4M2.bin file
4. Save File as TestT4M2.bin
4. Open Hi Slope and set to actual Injector size Eg: 24.84 from default value 19.203
5. Close Hi Slope before moving forward.
6. Now Setup Lo Slope, Breakpoint, Sarchg (CID), MinPW =Set to 0, Maf = Known curve? Use actual values and Manufacturers Inj Specs.
7. Save New Strategy TestT4M2.bin
8. If using Tweecer CalEdit open new bin file and load strategy (Never make changes in CalEdit Use Tunerpro for all changes)
Note: For users with 19lb injectors then no changes are needed as T4M2 has stock 19lb injectors?

Eg: Using 24 lb/hr Cobra injectors
*My injector data = 24.84
*High slope = 24.84
*Low slope = 24.84

*Break point = .0000100136
*MAF transfer = from a known
*SARCHG = 301.90
*Min PW = 0
* Global K-constant stays at 30