Hi, I was wondering if anyone knows if it's normal to start a car, cold or when hot, and whent he ignition starts, the idle jumps to like 3-4k RPM and drop right down to idle? (not referring to cold start of engine warming feature).

Thanks,

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1997 Silver AMG C36
OEM Advantegarde Grille
OEM Clear Corners
W210 Blinking mirrors
Eibach/Bilstein Combo
Zender Rear Lip Spoiler