EFIDynoTuning Forum

efloth

I need a new one. Any recommendations on brands or enclosed/visible spring?

efloth

gracias

efloth

Looks like FN1129 is causing it. Should I just zero it out or is there a good way to figure out how much timing is necessary?

efloth

Assuming you don't care about a touchscreen or 2in1 convertable.

https://www.walmart.com/ip/Lenovo-Ideap ... 82SG00BLUS

If you can spring an extra 100 bucks:

https://www.lenovo.com/us/en/p/laptops/ ... ZUQAvD_BwE

efloth

I still think doing a UV erase / in place reprogram of the factory eprom would be the most useful development. I love the quarterhorse but being able to reprogram the box when done tuning would be amazing. Any hope of using something like this to reprogram it? I have a ECU with a bad injector driver I'd be willing to donate for testing purposes.

efloth

Is it better to pull timing or add fuel when towing? I I'm thinking towing in first gear is going to be pretty light throttle once up to speed so it'll be running stoich. Should I just add some digits to the bdl table?

efloth

I figured this was easier than trying to decipher The first gear tcc functions. I didn't dive into it much but it's very different than the other gears.

efloth

I used the development mandatory tcc lockup code to bypass the factory first gear tcc code. SW_MLK is now read from memory address 77e which is controlled by the patch code now. Lockup at 28 mph and unlock at 20 is hard coded but I made scalars to adjust as needed.

Code: Select all

794a: ef,27,28            call  a174             Sub_a174 ();
794d: ff                  nop                    
794e: 39,42,0c            jb    B1,R42,795d      if (B1_R42 = 0)  {

Code: Select all

Sub_a150:
a150: 99,02,d9            cmpb  Rd9,2            
a153: d7,17               jne   a16c             if (Rd9 = 2)  {
a155: b1,02,34            ldb   R34,2            R34 = 2;
a158: 99,38,8d            cmpb  R8d,38           
a15b: de,05               jlt   a162             if (R8d >= 38)  {
a15d: c7,ee,fe,34         stb   R34,[Ree+fe]     [77e] = R34;
a161: f0                  ret                    return; }

a162: 99,28,8d            cmpb  R8d,28           
a165: d6,04               jge   a16b             if (R8d < 28)  {
a167: c7,ee,fe,00         stb   R0,[Ree+fe]      [77e] = 0; }
a16b: f0                  ret                    return; }

a16c: b1,06,34            ldb   R34,6            R34 = 6;
a16f: c7,ee,fe,00         stb   R0,[Ree+fe]      [77e] = 0;
a173: f0                  ret                    return;

   Sub_a174:
a174: 3f,e0,04            jb    B7,Re0,a17b      if (B7_Re0 = 0)  {
a177: c7,ee,fe,00         stb   R0,[Ree+fe]      [77e] = 0; }
a17b: b3,ee,fe,42         ldb   R42,[Ree+fe]     R42 = [77e];
a17f: f0                  ret                    return;

efloth

Hold 1st patch worked out great towing today. She's got too much timing in her under light throttle above 2500 RPM. Started pinging pretty heavy so I pulled over and stuck it in low range and set wot threshold down to 250 for safety. Pulled fine the rest of the way enriched.

efloth

My brain hurts. I tried setting TM_CS_ENG to TMCSE3 and it's back to disengaging entirely on decel. Not sure if I'm up against the physical limitation of the transmission or my code is hosed. Either way mission accomplished so thanks for all the help.

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