I got a 05 5.3 wit pacesetter lt's wit true duals no cat ported throttle body and nelson tune. Every since i had my truck even when it was all factory it wont do a burnout i can hold d brakes and gas. It will stop at 2000rpm i had torque management pull off 80% it there something else i can do to maybe fix this problems

 

i think its brake torque management or something like that

 

Im not an expert but your exhaust might be to free flowin for the mods you have done to it. Resulting in a low end loss. I have LPP longtubes 90% TQ managment removed and mine will powerbrake, I have a single 3in pipe to a 40series flowmaster, which I know isnt the best muffler. I could powerbrake even before the headers though.

 

what gears you got?

 

i had true dual 2.5 flowmasters with long tubes and i could always roast them

 

stock 4.10 gears rite now i have a dual in dual out 70 series big block flowmaster. im gonna call nelson in the mornin and see what they say