rpm drop lower than idle after throttle release

[Ludlow]

hello everyone.

i have noticed that while in park if i rev engine normally(1500-2200rpm) then let off the throttle, when the rpms come back down they drop to about 500-600, the engine will "stall" for a split second, the interior lights will flicker, then rpms come back up to normal idle range (750-900rpm)

i would like to know where to start looking to solve this problem. is it deceleration fuel cut off?

i havent done a log of this situation yet, but i will attach my tune file

could this be a vacuum problem? the cam is a 107 lsa.

[LS ROB]

Probably need to add more airflow in the 500-800 range.

[Ludlow]

Im new to tuning and hp tuners, i checked every chart under airflow, but i didnt find anything to do with rpms.

Would you be able to guide me in the right direction?

[edcmat-l1]

Idle/Airflow/Base running airflow final minimum.

[Ludlow]

Thank you!!

[Alvin]

hello everyone.

i have noticed that while in park if i rev engine normally(1500-2200rpm) then let off the throttle, when the rpms come back down they drop to about 500-600, the engine will "stall" for a split second, the interior lights will flicker, then rpms come back up to normal idle range (750-900rpm)

i would like to know where to start looking to solve this problem. is it deceleration fuel cut off?

i havent done a log of this situation yet, but i will attach my tune file

could this be a vacuum problem? the cam is a 107 lsa.

This is often cause it is going too rich when you lift off the throttle. Or the airflow models are incorrect.

[Ludlow]

what do you suggest i do? i attached my log in the post, do you see anything strange? i checked the airflow final minimum as edcmat suggested. but it seemed pretty smooth.

[morepowerjoe]

How about a list of your mods with cam specs?