RPM's bounce after revving

Osiris_Y2K

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Brighton
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Austin, Texas
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2021 A90 Supra Phantom
Hello, there's been a handful of instances where after I turn my car on and rev it the RPM's bounce for a little before returning to a smooth idle car was warm every time I did this it just seems to be after turning it on?
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suicidaleggroll

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Adam
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I'm not sure if it's normal, but mine always lopes a little when returning to idle before smoothing out. That's with an intake, turboback, and E50 tune.
 

Escapist

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Alex
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I don't remember if mine did it stock but mine does it after a cold start with my tune and a few bolt ons. Idle smooths itself out after a few seconds, I wouldn't worry about it.
 

MisterSkiz

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Don't rev up a cold car - your bearings will thank you :)
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