Is there any 3.5L engine idle bounce that would be considered normal?

[Mangolorian222]

3.5L Tremor with around 4k miles started recently doing this at start up both cold and not cold. You can hear the engine bouncing up and down too. What do y’all think?

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[tony72cutlass's']

sounds normal to me the engine is just trying to meter the fuel and air ratio properly. Another reason why i always disable auto stop/start.

 

[powerboatr]

seems normal as with mine on start up, as well as what my 13 and 16 eco boost did. my 13 actually idled pretty wildly at times 300 or so rpm, until it decided it was ok
actually 100 rpm is nothing for a fluctuation

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