SOLVED!!!! Well, made the problem go away at least, not sure exactly "why" but hopefully this thread now can serve to help someone else out too.
- Took the VSS signal away from the engine...
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SOLVED!!!! Well, made the problem go away at least, not sure exactly "why" but hopefully this thread now can serve to help someone else out too.
- Took the VSS signal away from the engine...
The tune and log file in the first post are the cleanest ones I have on hand, Frame 310 in that log is where the issue in question starts. Is there another PID I should be logging? Not sure where...
A search for D9401 in the calibration file came up with no results.
If by TCM you mean transmission control; The GMPP e67 controller unfortunately doesn't have any transmission parameters, it just...
Ah, youre right in that particular tune file (few iterations ago) I did have throttle limit active and lower values set in the higher rpm cells trying to do some torque clipping to keep the previous...
Hey thanks for the quick input. A while back I did set all of those drivetrain parameters to no (built 4l80e and ford 9" so should be safe in this case) which still did not affect the SEMRET timing...
*** ISSUE SOLVED*** (findings posted on page 2)
Man, this e67 has been kicking my butt in efilive. How the heck do I get GM.SEMRET to stop pulling 20-30deg timing on launch!?!?! I'm not exactly...
Update, so I did confirm that the work-around did in fact work! would really be nice to simply be able to see that hidden idle rpm value/table in the lsx376-480/525 tune files, but in the meantime,...
OK, so.... potential solution! Start with tune file "2010 GMPP E-ROD" (12638778) and update all values/tables with your tune file parameters "RevS idle Checkpoint" (12638778) in my case, and viola;...
*EDIT* Changed title once I realized what was going on. The tune/OS 12638778 in the GMPP E67 controllers have a known issue of not being able to get the idle rpm to go below 875, regardless of ANY...
SOLVED! Put an old grungy used LS1 IAC motor I had laying around on there and its dead consistent now! Apparently, the nice new IAC motor was reporting that it was increasing the steps for...
Hmm, I have not done any testing with the airflow parked table. It had seemed on the surface that it only set the IAC position during engine shutdown or key on, engine off, but things aren't always...
After running a half-tank of fuel through this thing just idling, and carefully methodically collecting crazy amounts of data, graphing in excel....i'm stumped!
First issue I solved (tip for...
Finally had a chance to do some testing and all seems great on the calc airflow and trans pressures. :)
I think the trace not starting was just due to either me having two instances of the tune tool...
Thanks for the clarification joecar.
So, I did verify that I do not have a spark issue; the correct timing values are being pulled from the entire spark Low table, the trace simply wasn't following...
Its a swap application, 68 Impala show car with w30 olds style functional ram-air hood.
The genIII engine and 4l80e combo is up and running with a preconfigured pcm and harness (looks like they used...
Tried to search and read up as much as possible, but wanted to see if there was a definitive answer.
An accurate airflow measurement on this application isn't feasible. But, as I understand it, a...
You were right, sure enough, b4003, 4, and 5 were responsible for that floor I was hitting. So to me it seemed like b9021 really is a transient value and in my case did some screwy things, and...
Well, just had a very interesting experience...
The stock b9021 value was 0.988 and not knowing exactly how that was influencing the pulse width floor, I just reduced it by 20% to gauge the effects....
Ahh, sure enough, there it is, a cax for 12592618 OS! Somehow I missed that instance when I used the search for that number... it pulled up a LOT of results. Thanks for pointing me back in the...
Per supplied data for my injectors, I have:
B4003 Min Injector Pulse Width set to 1.299mS
B4004 Default Min Pulse Width set to 1.280mS
B4005 Small Pulse Adjust are negligibly small values
During...
Ah, thanks for the PM info, coincidentally it looks like i just reached it lol.
Thanks for the tip on the 2nd gear slip too. I have a billet converter with HD clutch, but honestly I never have...
Hey Taz, that would be awesome! My current tune file is attached. It seems like I don't have the ability to PM on here (maybe my post count is still too low?) but I updated my settings to allow...
Reviving an old thread... but any confirmation the TCC lock on decel for 4l80E's in trucks is working? Still interested in being able to keep mine locked!
Thanks for the info on that Max torque by RPM table, I'll have to see if that has any effect on mine also!
The WOT tip-ins were all done from a stop (since I was mostly seeing the timing dip at...
Cool, would be interested to hear what that was, thanks!
Another thing I'm looking at now, is since I'm mostly seeing these huge deviations in quick transient conditions, I think having to log...