[camarocasanova]

specs: 2010 5.7 6 speed with kenne bell supercharger, srt exhaust.

Sometimes, not always, when I shift into neutral the car stays at higher rpms. It should immediately fall to normal idle, but will stay at let's say 2500 rpm for 5 seconds or more then finally drop. It seems to occur when under slight boost and I have to drop to neutral for some reason like letting off quickly for some reason. I was thinking that maybe the boost isn't getting properly discharged. Kit has low miles on it so I am hesitant to think it is a mechanical issue. Any thoughts?

 

[camarocasanova]

Other thoughts that crossed my mind: IAC, TPS ??

 

[y2krtaf]

More than likely a tune issue,possibly tied to intake air temps spiking under boost.

Talk to your tuner,and do some data logging.