5.3L with big cam won't idle at target speed

[30thta436]

I have a 2014 5.3L with a large cam and I am having a hard time getting it to idle at my target idle speed, and timing is jumping all over the place. It also will just shut off randomly at above 2600 when I let off the pedal. Any help is appreciated.

[69camaro5speedefi]

409Jake 409Jake is offline
Tuner in Training

Join Date
Nov 2011
Posts
21
Im dealing with similar issues on a similar combo, and found that lowering the Airmass A-D tables in the idle area is helping bring the idle up to commanded. I swagged out 80% first, then been fine tuning from there.

I dialed in the SD and Maf first and trims are in line... Still needs some work, but getting closer it seems...


helped me

[30thta436]

Thanks for the reply. I greatly appreciate it

[69camaro5speedefi]

your welcome

[Redline MS]

make sure airflow is correct. What are you grams/cylinder and what hertz is it idling at?

Airflow=torque and the ECM is trying to hit a torque number. It will do what it needs to do so even if the engine idles with negative timing values and messes with the throttle blade.

[Joshtuning]

make sure your fueling is correct it will help you get your targeted idle speed