LLY: my truck's weird issues...revisited...again

[TrentNell]

Ben log the rough part throttle shifts and let me know a time frame in the log , also have you considered swaping ECM's with a known good one out of another truck ? also considered putting the truck on a charger while flashing ? I have ran into some weirds flashing issue's since a went to a single battery , have since hooked up a charger or jumper cables when flashing . Just some simple things to try , and i would be interested to see some logs from the new tune , also did you try the non-dsp tune ?

 

[x MadMAX DIESEL]

also have you considered swaping ECM's with a known good one out of another truck ??

Great minds think alike. I was just gonna say that

 

[duratothemax]

Ben log the rough part throttle shifts and let me know a time frame , also have you considered swaping ECM's with a known good one out of another truck ? also considered putting the truck on a charger while flashing ? I have ran into some weirds flashing issue's since a went to a single battery , have since hooked up a charger or jumper cables when flashing . Just some simple things to try , and i would be interested to see some logs from the new tune , also did you try the non-dsp tune ?

I have not tried putting a charger on the truck while flashing, but that is a good idea; Ill try it. I am actually now running two batteries though and I always shut off the headlights etc... while flashing.

I did not try the non-DSP tune yet. Perhaps there is some underlying issue with the DSP 2 OS that never really was brought to the surface because everyone went straight to DSP 5? I mean how many people still run DSP2? Im old school I guess; I dont even have a DSP 5 switch wired up and dont really have any desire to...I have my drive/tow tune (which is basically just a stock tune, except I have the big injectors so its a little more than "stock" power level), and my big/race tune. I never really saw any merit in having more than two???

 

[TrentNell]

If I do an extended WOT run, it still throws MAF codes (and subsequently does odd fueling things) with the new MAF calibration that Trent helped me out with, so I still have some messing around to do with that. Even with the "out of range" enablers set way high it still throws P0101 and P0103.

Also Ben , those tables are for a 5" intake , it may need diff scaling for your 4" intake , the velocity is going to be quite a bit different i would think , Also as i stated before I have ran into some weird issue's with the DSP 2 OS, the first time i ever saw it was on a truck at the track , I barely new the guy but he was having issue's spooling so I tried to help him fix it , It didnt matter what we put in the base torque or TLIQ it would not fuel right , this is a LB7 even ,after several hours of tweeking and tuning we flashed a non dsp tune in it , it fixed it and non of the tables were very different in the tune we flashed in ,it wasnt the same as your issue's Ben but was simalr in the way it would or wouldnt command TLIQ like it had a mind of its own.

 

[stacks04]

Trent I tried your base torque and torque limited tables and it seems to be better. But it shifts badly at part throttle, and you can see in the logs the main rate is still jumping all over the place. (only the defuel isnt actually felt because of the tliq and base torque tables)

The weird thing though is initially it defueled just the same with trents modified torque-table tune. Then I reflashed it to a stock LBZ-airbox calibration with the Tech 2, then re-full-flashed my tune back in and thats when it started acting not as goofy anymore.

Another odd thing is trent's base torque tables and tliq tables were similar to some of my very old tunes (like from back in 06 when I had a stock LLY motor and BD turbo and raced it all the time) yet they only defueled sometimes...

So from what I can see, somewhere along the line maybe something outside of efilive's capability got screwed up in the ECM.

If I do an extended WOT run, it still throws MAF codes (and subsequently does odd fueling things) with the new MAF calibration that Trent helped me out with, so I still have some messing around to do with that. Even with the "out of range" enablers set way high it still throws P0101 and P0103.

You cant set those codes to "not report no mil" on an LLY (from what I have found) because that causes other weird issues and 'phantom' codes. For example if you set P0101 and P0103 to not report, you will be driving along, doing some WOT runs and all of a sudden you notice the truck just doesnt feel "right"...not as punchy as it normally is. Check for current or pending DTC's and there are none. But if you tell it to "clear codes" anyways, you suddenly regain the "normal" feeling in the truck. I had this happen a lot back in 06 when I first started racing my truck, so before each run I would clear all codes with the Tech 2 (didnt always work with efilive, sometimes it would still stay in the "phantom code" mode) and didnt really have as many problems.

i am glad i am not alone on this. i am running the dsp5 setup. i might make a big tune to flash in as a tune only and see if it changes. i may also do a flash of the stock lbz rescale tune through vis and use that as my base now. instead of the script i used from someone here when i changed the intake. like you said ben, there may be more stuff changed and we really cant see it.

 

[sweetdiesel]

If your part thottle shifts bad you need to fix your base tq and tliq to make it right a few 100 in the base tq table makes a huge difference!


Odd that it was the tq tables? Didn't someone mention that a while ago?

 

[duratothemax]

and like I said, its still not "right". The tech-2 reflash made it a little better.

 

[TrentNell]

Also , I still havent seen the TCM tune being used and that can play a small part too , I am just trying to help Ben and will spend as much time as it takes as long as you get me info to work with . Also I think we should focus on WOT first then trickle down to the rest of the issue's , If we can get the WOT working, then part throttle stuff can the be addressed .

 

[Mike_S]

Any progress?

 

[duratothemax]

Ive been busy working on customers trucks here, as well as my lockup switches so I havent had much time to mess around with it.

I also have a boost leak that I need to fix.

So far Ive really only had time to modify trent's tables to make my truck shift properly at lower throttle % and speeds (this is not trents fault at all, my unique base tune/timing/injectors/etc all affect part throttle shifting so there was no way for trent to really figure out my shifting fueling) for daily driving.

The WOT 4-5 shift on the big tune lays over a lot for a second, but then it seems to come back with close to full fueling??? Again, every run seems to be slightly different as far as what the ECM does. I dont know if its MAF related or what.

also I just want to say that what we are doing here/trent is helping me with, is MASKING the issues...not "technically" eliminating the root cause of the problem, which is related to some other table/limiter in the ECM that EFILive does not have access to. The ECM is still reducing/limiting torque internally, but we are trying to play with the TLIQ tables so that even when the ECM does command a torque reduction (this is what that Driver demanded torque PID refers to, and yes, DDT can override throttle position, maybe efilive has it incorrectly labeled? DDT sometimes follows throttle % but not always), its "defueling/reducing torque" to 100mm3....which is of course still full fuel.

Another thing that I didnt really think of before is my torque converter lockup, or something else in the TCM...I wonder if there is something else in the TCM (that efilive doesnt have access to, I think thats what everyone using EFILive tends to forget, that there are plenty of other tables in both the ECM and TCM that are invisible to EFILive) that denotes TCC slip rpm or TCC apply with a torque reduction value?

ben

 

[TrentNell]

If you get a chance Ben send me a WOT log up to 100mph ( on a closed course ) :rofl: I am curious to see in alog what its doing compared to before the changes , and yes in a since it does only cover it up , or Masks it but I havent seen a log to know one way or another , but we all know that with our tools at hand we can not control all the toque requested by the computer / TCM fully , simply the fueling associated with said torque # I wont know untill i see the logs what improvement we have made . The only way to stop the torque reduction request is in the TCM (D5197), but it takes all of it away which as we both know is bad but i want to see what your truck is doing compared to others i have tuned to seeif it is comparable or not . One of these days i am going to try one of the "Destroked" transmission controllers , it will be interesting to see how that changes the equation if any .

 

[duratothemax]

One of these days i am going to try one of the "Destroked" transmission controllers , it will be interesting to see how that changes the equation if any .

I think you will like the results Trent.

 

[dmaxvaz]

I think you will like the results Trent.

I am curious if you bead rolled the cold pipe in between the turbos? your pics didnt look like it was?

 

[duratothemax]

I am curious if you bead rolled the cold pipe in between the turbos? your pics didnt look like it was?

No I did not, but I have not had any problems with it blowing off at 55+psi.

The reason its leaking is because my silicone boot that attaches the cold pipe to the [stock] turbo mouthpiece/inlet isnt long enough...the bend is a little awkward so I ordered a longer silicone boot to make up for the difference and allow the clamps to seal properly.

ben