Hello everyone, I've had this problem with (2) two 2007 4.8 silverados, and (1) one 5.3 silverado 2007 already. What I do is i up spark tables, do fuel enrichment mods, and transmission changes...but when i go to torque management under the engine tab and disable ETC tip in limiting, disable powerhop spark cut fuel cut everything, i flash the pcm, BUT when the pedal is depressed the truck does not accelerate at all..its like its in limp mode..engine reduce power mode or something...but theres no codes... what gives? then all of a sudden the truck accelerates hard like real crisp...then we turn the truck off then turn it on and it starts barely accelerating. You depress the pedal at everything it has and it just barely moves... I am assuming this has to do with something on the ETC tables..im going to upload one file so you guys can check it out.

Does setting the enable rpm at 8192 have anything to do with under speed limiter? its stock at 1500 and i set it to 8192.




4.8 silverado 07 ETC

thats the link where i have the tune file