2018 6.2 Silverado 67% tps WOT

[Matt_lq4]

Tsp lt1 stage 2 (227/242) (0* lockout so I selected "none" in the vvt tab) cammed 2018 6.2 silverado, 8 speed, Circle D converter. Cai, catless, longtubed headers. Disabled map high voltage test and the tab for "P0101, P0106, P0121.

When I go full throttle, the throttle body is definitely not opening fully based on the 87 kpa map at 5400 rpm and low 67% tps percentage. Accelerator pedal position shows 99.6% in the scanner.

I took away 20% from the torque tables in those airmass and rpm areas, no change.
Added 30% to the "Driver Demand Normal" table from 74% accelerator pedal position to 100%, no change.

I did increase the airflow limits in the engine diagnostic tables by about 20-30%, not sure if that has a background effect to my issue.

[Alvin]

ECM 32920 will likely need to be bumped up out of the way. Do not max out. Use realistic values + a small buffer.


All the torque limiters can be maxed out starting with ECM 2811

[Matt_lq4]

Thank you Alvin, I'll give it a shot

[Matt_lq4]

Unfortunately that didn't work, still at 67% tps wot

[Alvin]

post your file now so I can double check your work. Post the stock file also.

[Matt_lq4]

post your file now so I can double check your work. Post the stock file also.

Here is a picture, I didn't alter the 4wd limiters though, not sure if that's important or not.

[Alvin]

All the torque limiters can be maxed out starting with ECM 2811

Untitled.jpg

Take all the torque limiters off. Circled red

[Matt_lq4]

Screenshot_20241119_124348_Gallery.jpg
Still the same low tps% unfortunately.

Screenshot_20241120_151514_Gallery.jpg

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Tsp lt1 stage 2 (227/242) (0* lockout so I selected "none" in the vvt tab) cammed 2018 6.2 silverado, 8 speed, Circle D converter. Cai, catless, longtubed headers. Disabled map high voltage test and the tab for "P0101, P0106, P0121.

When I go full throttle, the throttle body is definitely not opening fully based on the 87 kpa map at 5400 rpm and low 67% tps percentage. Accelerator pedal position shows 99.6% in the scanner.

I took away 20% from the torque tables in those airmass and rpm areas, no change.
Added 30% to the "Driver Demand Normal" table from 74% accelerator pedal position to 100%, no change.

I did increase the airflow limits in the engine diagnostic tables by about 20-30%, not sure if that has a background effect to my issue.

Attach your tune file so everyone can see what's wrong with it.