LLY: Won't give me max mm3

[SSchmi5519]

Fueling ( or de-fueling for that matter) should be limited by the ECM, not the TCM.

TCM torque limiting should be left on. Disable this and look forward to a new trans.


Sent from my iPhone.

 

[paint94979]

Fueling ( or de-fueling for that matter) should be limited by the ECM, not the TCM.

TCM torque limiting should be left on. Disable this and look forward to a new trans.


Sent from my iPhone.

TCM torque limiting off for me since 09 trans is good

 

[bluessmax]

Some live, some tie up..some it doesn't even do sh!t....in my eyes its just a unnecessary band-aid....

 

[DIESELMAFIAPER.LB7]

I like the dd of defuel off mike l said no no lol have you found any pending codes sometimes that'll give you a hint were to start looking.

Also have you tried clearing codes and logging again? Fuel temp senor limited me a few times without setting a code

 

[SSchmi5519]

Looks like I never posted that this issue was resolved...thought I had. I scritped the tune and changed to the newest OS and it ran flawlessly...HOWEVER, ran the same 1/4 speed showing same rail and (now) more pulse in the log.


2300uS to 3000uS is a big jump in fuel and would cause a noticible reduction in ET. I made follow up 1/4 passes that were the same ET and trap MPH.

I suspect there was an error in the scan tool or the way it was logging my data, which caused the logged data to be incorrect.
Really drove me crazy all day long at the track, there seems to be no issues with the latest public release of everything (V7.5, V8, EFI Explorer, firmwares, and bootblocks).

 

[hondarider552]

TCM torque limiting off for me since 09 trans is good

You race once a year Torque limiting off on my trans made it shift like crap, was also due to poorly modified DSP2 tunes by the previous owner

 

[ikeG]

Bring this back up cuz our puller never runs over 99.6 or 99.7 mm3 during the length of the pull. Everything else is perfect but it willonly run 99mm3 with all limiter tables maxed out. I cannot find the reason and figured i could be fine with it because i can tune to run the way i want since its so close to 100mm3 any how.
Any thoughts?

 

[juddski88]

Pretty sure Ben had a good thread about this. Simon had some good info too.

 

[sweetdiesel]

The TCM will not limit total fueling, but B0742-4 will limit total fueling. Make sure they didn't get changed along with B1103-B1105.

It did on my LB7, It would not fuel in the 86mm3+ fuel tables. Disable the tq reduction table in the TCM and was back to full fueling.:woott:


I do agree that BO742 and B1103-5 need to be adressed these are the King and Queen fueling tables on a LB7 & LLY.

If your PW tables are set the same at 80 as they are at 80+ then its not a issue,However I dont like this as it starts to mess with shifts ( pending how you set up your tune)


Tables that you might want to look at are TBIQ B0727, B0751 , G0901 to B1101,B0730, B1106 And ofcourse PW tables.

 

[sweetdiesel]

Old thread

http://www.duramaxdiesels.com/forum/showthread.php?t=16504&highlight=speed

Ive seen trucks unaffected by this table change also,Strange but it worked well for me.

 

[THEFERMANATOR]

It did on my LB7, It would not fuel in the 86mm3+ fuel tables. Disable the tq reduction table in the TCM and was back to full fueling.:woott:


I do agree that BO742 and B1103-5 need to be adressed these are the King and Queen fueling tables on a LB7 & LLY.

If your PW tables are set the same at 80 as they are at 80+ then its not a issue,However I dont like this as it starts to mess with shifts ( pending how you set up your tune)


Tables that you might want to look at are TBIQ B0727, B0751 , G0901 to B1101,B0730, B1106 And ofcourse PW tables.

I guess some are different, but I have yet to have a problem getting one to fuel to 120MM3 of fuel without touching anything in the TCM.

 

[sweetdiesel]

I guess some are different, but I have yet to have a problem getting one to fuel to 120MM3 of fuel without touching anything in the TCM.

The issue never arose untill i went over 750hp, I do know a few trucks also that never needed this change. But mine and for sure 1 other did?

It is strange to say the least.