How do you stop a cammed LS from stalling when coming to a stop?
In HP Academy's method, stalling or dipping as the car comes to a stop usually means the computer isn't allowing enough airflow at idle for the cam:
- Idle target high enough for the cam (about 800–850 rpm for an aggressive cam, higher when cold).
- Base running airflow filled in from logged airflow, plus 1–2 g/s of margin to stop rpm dropping out.
- Idle "percentage max" raised from about 2% to 4% or more so the computer can open the throttle.
- Adaptive spark (over/underspeed) halved from factory, so timing doesn't swing the idle.
Get fuel and spark right before touching idle tables. See cam tuning.
Want to do it yourself? See who tunes it, and how to learn.
Confidence: medium — sources disagree or are limited; check the sources below.
Related questions
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Sources
- LS Tuning For Optimum Performance — LSX Magazine
- LS Idle Tuning Basics With HP Tuners — High Performance Academy