I tuned a frien 5.3 with cam and heads. Gen III cable TB

Idle great, no stalling on-off idle. P/N and gear idle is set and stays as commanded 800rpm.

On a stop, you let go the brake pedal, no accel input, and it climb rpms to about 1500+ rpm!!

You press the brake pedal and idle comes down to commanded value fast and steady.

When cruising also makes the same, you let go thortle, and it will act as if cruise control is engaged, also press brake pedal to complete stop and will go down fast and smooth.

Is there a way to tune thar roll idle out?

Throtle cracker? Thrtle follower? Any other?

Any tip welcome.

Regards