LB7: What is limiting my fuel?

JustinD

Plow Truck
Nov 21, 2008
2,067
0
36
42
Tiverton Rhode Island
Is there a way to tell if the trans is calling for a defuel?????????? My truck is back to doing exactly what it used to, feels like I'm towing an anchor?????????? I am going to log it today on my way home from work.
 

Janimal444

Member
Jun 25, 2012
354
0
16
Salem, NH
Is there a way to tell if the trans is calling for a defuel?????????? My truck is back to doing exactly what it used to, feels like I'm towing an anchor?????????? I am going to log it today on my way home from work.


Justin have you tried going into the TCM tune and turning off the Torque Control (de-fuel)? Go to Parameter D5197 and set that to disabled. That is not the proper way to get rid of defuel, it is kind of half-assed, but it will at least let you know if your current tuning is calling for it. Disabling these should eliminate defuel.
 
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SSchmi5519

LLY Cult Leader
Oct 19, 2008
3,387
1
36
Arizona
Justin have you tried going into the TCM tune and turning off the Torque Control (de-fuel)? Go to Parameter D5197 and set that to disabled. That is not the proper way to get rid of defuel, it is kind of half-assed, but it will at least let you know if your current tuning is calling for it. Disabling these should eliminate defuel.

I would only test that for a very shoft period of time. To rule out a tuning issue
 

JustinD

Plow Truck
Nov 21, 2008
2,067
0
36
42
Tiverton Rhode Island
I think either I am just a paranoid freak by now or possibly had the fuel gel up on me yesterday??? After I posted here I pulled the truck inside the shop and let it thaw out, it was covered in ice from rinsing it after plowing. On my way home it felt alot better, I think the tune I have in it may have either an overboost limit or MAF (no codes?) isn't right for my charger? drives good but just doesn't pull as hard as I remember. I do have the correct tune from Toman but I wanted to leave it alone for a while or until the trans re-adapted after the rebuild. I'll post a log with the correct tune.
 

dracing70

SH--- GETTING EXPENSIVE!
Jun 12, 2007
1,210
0
36
45
mantua, oh
My suggestion is to run new supply and return fuel lines. I believe this is the issue. I have just been too lazy to do it. It's the only unchanged item. In your truck and mine. What lift pump u running???
 

JustinD

Plow Truck
Nov 21, 2008
2,067
0
36
42
Tiverton Rhode Island
My suggestion is to run new supply and return fuel lines. I believe this is the issue. I have just been too lazy to do it. It's the only unchanged item. In your truck and mine. What lift pump u running???

Last November I put 2 new Kennedy lift pumps, a 10 micron filter and new bulkhead fittings on the tank, also ran new rubber hose from the tank to the pumps, if there was a leak after the pumps it would leak correct?



I am leaning more toward the transmission being the culprit again.......... I looked at the adaptives with a Modus and some are in slow and some are still in fast, I have put about 500 miles on the truck since the trans was installed, why hasn't it learned yet? If I reset TAPS it is good until it shifts a few times or I jump on it hard.