KR elimination

[99ssei]

Changes made last night:

- Put OEM low octane table back in
- Put OEM target idle speed back in
- Engine > Fuel Control > Accel Enrich > RE-Enable TPS , change the value to 26%
- Engine > Fuel Control > Accel Enrich > AE vs. TPS Max Delta
0.54999 0.69598 0.73602 0.77600 0.92401 1.12238 1.20367 1.18219 1.20239 1.15814
1.22321 1.26221 1.28827 1.28827 1.28827 1.28827 1.28827 1.28827 1.28827 1.28827
1.28827

- Engine > Fuel Control > Power Enrich > Add vs. TPS
2.00000 2.00000 2.00000 2.00000 1.25000 0.50000 0.00000 0.00000 0.00000 0.00000
0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000
0.00000

Here's this morning's scan data:
http://www.scandepot.net/viewscan.php?pk=5386
http://www.scandepot.net/viewscan.php?pk=5387
http://www.scandepot.net/viewscan.php?pk=5388

[BillBoost37]

One quick note on your PW's is that you are getting close to maxing in one or two cells.

[99ssei]

One quick note on your PW's is that you are getting close to maxing in one or two cells.

What's max?

[superchargedSSEi]

22ms is considered static I think. Usually once you start seeing IPWs of >20ms consistently it's time to consider larger injectors to get the duty cycle in a better range.

[99ssei]

22ms is considered static I think. Usually once you start seeing IPWs of >20ms consistently it's time to consider larger injectors to get the duty cycle in a better range.

Another mod! LOL

[99ssei]

No changes were made from this morning, however, I now logged current gear and TCC %.
http://www.scandepot.net/viewscan.php?pk=5389
http://www.scandepot.net/viewscan.php?pk=5390
http://www.scandepot.net/viewscan.php?pk=5391

Email quote from Foghorn:
"holy mother of pearl...37% TPS at 12 MPH in 2nd gear and the tranny
doesn't downshift...no wonder 35 to 40% TPS are problematic. Your fuel trims aren't that bad, though they've changed on these last scans from -2.3 to -3.9, and lock in reasonably well. The problem is your VE table has been vastly increased over stock which leaves the MAF table to have lower values than stock, which translates to lower engine load calculations. In your case the KR spikes are at relative low rpm in second or third gear while under boost, which is high load."

Our conclusion....reset VE, MAF, and high octane timing tables to stock and start tuning process over. :sad5:

[99ssei]

Started from scratch with the factory 1999 SSEi .bin settings. I kept the fan and speedo settings from the Intense bin. I loaded in all the tranny settings given to me by Foghorn. In regards to engine settings, here's what I kept from the Intense bin:
Target Idle Speed
Fuel Cutoff RPM vs. Gear
RPM Threshold
Spark Limiter Speed vs. Gear
Max Engine Torque vs. RPM vs. Gear (384 across the board - 381 across was stock - thinking about increasing this later)

Everything else is OEM.
I've already completed my 50 miles run for the VE table. Made an adjustment, reset fuel trim, went out for another 30 miles, made an adjustment, reset fuel trim, drove to work this morning, made an adjustment, reset fuel trim. I'm very close on the VE table, so I'm hoping that tonight's ride home, I can put the VE table behind me and focus on the MAF calibration ..... again. I won't clutter this thread with the VE tune info because it's already been covered. I'll post MAF calibration stuff when I get close.

[superchargedSSEi]

Did you keep any torque management changes made by Intense or was that included in the settings Foghorn gave you? Sounds like a good plan though, hopefully this'll clear up that part throttle KR you've been fighting.

[99ssei]

Did you keep any torque management changes made by Intense or was that included in the settings Foghorn gave you? Sounds like a good plan though, hopefully this'll clear up that part throttle KR you've been fighting.

"Torque Management" under the "Engine" configuration, the only different from stock settings are:

Max Engine Torque vs. RPM vs. Gear (OEM was 381 across all cells, 384 was kept value for all cells)
TCS method - Max Torque (only one cell was different @ 6000 RPM by 20)
Supercharger torque enable speed (changed from 116 to 255)

"Torque Management" under "Trans" (which is only "Abuse Mode" and "Torque Reduction") are Foghorn settings.

EDIT: EVAP UPDATE: New canister arrived and was installed last night. Old canister was a few lbs. heavier than new one (wonders how much crap is in there). 2 of the 4 EVAP hoses ordered are at the dealership. Picking them up tonight and putting them in. Hopefully, the other 2 will arrive tomorrow.

[2000Silverbullet]

I figured out how to avoid the massive KR I had been experiencing earlier in the year.

Make sure the lock up torque converter is not engaged.

As long as I manually shift it down to 1st or 2nd gear first, and then go back to D before going WOT, I don't get any KR. No KR from a stop.

[99ssei]

So, you start in D and then at a light or at the track, you put it in 1st, then go back to D before you launch?

Here's the latest scan data before I went to Byron Dragway today.




Foghorn helped me make some adjustments while at the track, however, I ran a miserable 14.443 Here are the histograms from that run. The high KR cells are from the attempted burnout before the run.




Still have more progress to make. :sad5:

[superchargedSSEi]

So, you start in D and then at a light or at the track, you put it in 1st, then go back to D before you launch?

The TC only locks up in 3rd and 4th gear at light-med throttle loads so you'll never have issues when starting from a standstill. You can get it to unlock either by popping the throttle before you go WOT or by manually downshifting to 2nd from 3rd, or to 3rd from 4th when you need to accelerate on the street. At the track you can just leave it in D, but I prefer to launch with the gear selector in 1st until I go WOT, and then bump it back into D. It keeps the trans from upshifting too soon if you have to go light on the throttle to keep the tires from spinning.

[99ssei]

Ah, got it. Thanks for the clarity.
Here's this morning's scan. Still having KR issues.
EDIT: Note, that this scan, I drove in 4th instead of 3rd to work (trying to save gas).
http://www.scandepot.net/viewscan.php?pk=5415
http://www.scandepot.net/viewscan.php?pk=5416
http://www.scandepot.net/viewscan.php?pk=5417

[superchargedSSEi]

Mostly part throttle KR still. The LTFTs on the right side of the histogram look nice at least.

I just got a new laptop battery so I can actually tune again, and spent the weekend getting my own car ready for the winter race season while I had a chance to borrow my roommate's wide band. Apparently things went to *shoot* somewhere in there since the last time I tuned, things looked great a few months ago...AFR now goes down as low as 10:1 during longer WOT pulls, which would explain the lack of top end power and black exhaust tips I've noticed lately. Looks like I've got a bit of work ahead of me too.

[99ssei]

On a suggestion, I did a cylinder compression test.
Here are my results:

CYL TEST 1 TEST 2

1 110 120
3 90 130
5 70 120

2 120 120
4 140 130
6 120 120

[99ssei]

On a suggestion, I logged misfires and Knock sensor in range and out of range for both the front and rear.
Quite some interesting data here. Can anyone help me decipher?
http://www.scandepot.net/viewscan.php?pk=5424
http://www.scandepot.net/viewscan.php?pk=5425

[99ssei]

After some thorough fine combing of the last scan, it was suggested to me that my KR could be caused by the torque reduction the PCM is enabling. Basically stated, the PCM thinks there is too much torque and thus enables the torque reduction, which shows up as KR (retarded timing). To test this theory, we made a few changes to the Engine Torque Management. Here are factory settings:



Here are the changes we made.



One note, we initially put the settings to the max (640) and upon start up, after closed loop was disengaged, the car's advance timing went from 16 to 0, very rough idle and almost dies, however scan did not show any KR or misfires. I'm thinking, the max ft./lbs allowable in the HPT is beyond the threshold for my PCM and it didn't know what to do with the number we put in. After putting in the above changes, I did 2 runs up to 50 mph at WOT and saw 0 KR (streets were wet after a good rain). Tomorrow's scans will verify if these changes were successful.

[2000Silverbullet]

After putting in the above changes, I did 2 runs up to 50 mph at WOT and saw 0 KR (streets were wet after a good rain).

I don't understand how you could have lost so much power.
You should have had no traction under those conditions at WOT up to and beyond 50 mph.

[superchargedSSEi]

Torque management interfering with things does make sense since just about everything else had been fixed during the tune, and a mechanical cause for the KR had been all but ruled out. The max torque in my table was set at 639.98lb/ft for all gears in the original Intense BIN, and the values for upshifts and downshifts in performance mode were tweaked as well. I've never had KR due to TM issues but I know others on the forum have, though it usually manifests itself as KR during shifts. I know you're not running the Intense BIN anymore but now I'm curious as to whether they may have scaled those values down in later pcm's, since the TM problems I've seen have mostly been from people with newer (than my nearly 3yr old one) PCMs...though that could just be coincidence since the number of modded cars had skyrocketed in the past few years.

You should have had no traction under those conditions at WOT up to and beyond 50 mph.

The look on passengers' faces when the tires spin at 80mph on a wet road...priceless.

[99ssei]

Well...that didn't work. I can't post the scan data here from work (seems like my IS group has blocked the site).
However, here's the histograms. I'll post scans later tonight.


Scan from this morning
http://www.scandepot.net/viewscan.php?pk=5433
http://www.scandepot.net/viewscan.php?pk=5434

Changed the engine max torque to 639. Still KR
http://www.scandepot.net/viewscan.php?pk=5435

I also disabled trans torque reduction with no affect. Still KR.