Slight hole off idle - 92' LS400

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LS400x

New Member
Has anyone got any ideas of a slight hesitation just off idle? I have had the plastic cover off the throttlebody and it seems to occur the transition from what i asssume is some sort of bypass circuit (soft take off?) to the initial opening of the butterfly. It does it in neutral also if opened at a moderate speed across this transistion (still very slight throttle opening).
 
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